/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:41:06,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:41:06,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:41:06,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:41:06,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 22:41:06,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 22:41:06,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 22:41:06,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 22:41:06,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 22:41:06,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 22:41:06,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 22:41:06,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 22:41:06,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 22:41:06,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 22:41:06,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 22:41:06,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 22:41:06,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 22:41:06,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:41:06,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:41:06,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:41:06,375 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:41:06,407 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:41:06,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:41:06,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:41:06,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:41:06,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:41:06,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:41:06,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:41:06,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:41:06,409 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:41:06,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:41:06,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:41:06,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:41:06,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:41:06,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:41:06,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:41:06,410 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:41:06,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:41:06,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:41:06,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:41:06,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:41:06,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:41:06,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:41:06,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:41:06,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:41:06,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:41:06,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:41:06,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:41:06,420 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:41:06,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:41:06,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:41:06,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:41:06,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:41:06,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:41:06,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:41:06,663 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:41:06,663 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:41:06,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2022-01-09 22:41:06,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930e3a8ee/3dd8e82165084620b6a06453b35f770a/FLAGbdc9efb5d [2022-01-09 22:41:07,155 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:41:07,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2022-01-09 22:41:07,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930e3a8ee/3dd8e82165084620b6a06453b35f770a/FLAGbdc9efb5d [2022-01-09 22:41:07,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930e3a8ee/3dd8e82165084620b6a06453b35f770a [2022-01-09 22:41:07,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:41:07,194 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:41:07,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:41:07,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:41:07,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:41:07,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506db391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07, skipping insertion in model container [2022-01-09 22:41:07,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,206 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:41:07,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:41:07,376 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c[524,537] [2022-01-09 22:41:07,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:41:07,411 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:41:07,421 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c[524,537] [2022-01-09 22:41:07,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:41:07,439 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:41:07,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07 WrapperNode [2022-01-09 22:41:07,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:41:07,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:41:07,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:41:07,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:41:07,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,466 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2022-01-09 22:41:07,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:41:07,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:41:07,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:41:07,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:41:07,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:41:07,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:41:07,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:41:07,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:41:07,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (1/1) ... [2022-01-09 22:41:07,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:41:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:07,516 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 22:41:07,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-09 22:41:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:41:07,556 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-09 22:41:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-09 22:41:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:41:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:41:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:41:07,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-09 22:41:07,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-09 22:41:07,604 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:41:07,605 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:41:07,705 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:41:07,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:41:07,710 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 22:41:07,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:41:07 BoogieIcfgContainer [2022-01-09 22:41:07,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:41:07,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:41:07,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:41:07,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:41:07,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:41:07" (1/3) ... [2022-01-09 22:41:07,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e128d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:41:07, skipping insertion in model container [2022-01-09 22:41:07,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:41:07" (2/3) ... [2022-01-09 22:41:07,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e128d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:41:07, skipping insertion in model container [2022-01-09 22:41:07,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:41:07" (3/3) ... [2022-01-09 22:41:07,725 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound50.c [2022-01-09 22:41:07,729 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:41:07,729 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:41:07,767 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:41:07,773 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 22:41:07,773 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:41:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-09 22:41:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-09 22:41:07,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:41:07,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:41:07,796 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:41:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:41:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1086166160, now seen corresponding path program 1 times [2022-01-09 22:41:07,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:41:07,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226571233] [2022-01-09 22:41:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:07,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:41:07,915 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:41:07,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102471978] [2022-01-09 22:41:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:07,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:07,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:07,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:41:07,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 22:41:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:41:07,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-09 22:41:07,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:41:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 22:41:08,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:41:08,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:41:08,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226571233] [2022-01-09 22:41:08,056 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:41:08,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102471978] [2022-01-09 22:41:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102471978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:41:08,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:41:08,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:41:08,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042559238] [2022-01-09 22:41:08,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:41:08,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:41:08,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:41:08,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:41:08,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:41:08,096 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-09 22:41:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:41:08,116 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-01-09 22:41:08,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:41:08,118 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-01-09 22:41:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:41:08,124 INFO L225 Difference]: With dead ends: 47 [2022-01-09 22:41:08,124 INFO L226 Difference]: Without dead ends: 21 [2022-01-09 22:41:08,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:41:08,131 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:41:08,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:41:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-09 22:41:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-09 22:41:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 22:41:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-01-09 22:41:08,170 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2022-01-09 22:41:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:41:08,170 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-01-09 22:41:08,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-09 22:41:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-01-09 22:41:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-09 22:41:08,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:41:08,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:41:08,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 22:41:08,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-09 22:41:08,388 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:41:08,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:41:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709874, now seen corresponding path program 1 times [2022-01-09 22:41:08,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:41:08,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845906386] [2022-01-09 22:41:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:08,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:41:08,404 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:41:08,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043729624] [2022-01-09 22:41:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:08,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:08,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:08,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:41:08,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 22:41:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:41:08,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 22:41:08,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:41:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:41:08,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:41:08,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:41:08,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845906386] [2022-01-09 22:41:08,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:41:08,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043729624] [2022-01-09 22:41:08,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043729624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:41:08,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:41:08,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:41:08,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786624263] [2022-01-09 22:41:08,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:41:08,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:41:08,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:41:08,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:41:08,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:41:08,574 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-09 22:41:08,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:41:08,587 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-09 22:41:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:41:08,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-09 22:41:08,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:41:08,589 INFO L225 Difference]: With dead ends: 30 [2022-01-09 22:41:08,589 INFO L226 Difference]: Without dead ends: 23 [2022-01-09 22:41:08,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:41:08,590 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:41:08,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:41:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-09 22:41:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-09 22:41:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 22:41:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-09 22:41:08,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2022-01-09 22:41:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:41:08,597 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-09 22:41:08,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-09 22:41:08,598 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-09 22:41:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-09 22:41:08,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:41:08,598 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:41:08,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 22:41:08,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-09 22:41:08,822 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:41:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:41:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1347497334, now seen corresponding path program 1 times [2022-01-09 22:41:08,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:41:08,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573316274] [2022-01-09 22:41:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:08,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:41:08,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:41:08,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855935093] [2022-01-09 22:41:08,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:08,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:08,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:08,843 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:41:08,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 22:41:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:41:08,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-09 22:41:08,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:41:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:41:09,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:41:09,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:41:09,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573316274] [2022-01-09 22:41:09,207 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:41:09,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855935093] [2022-01-09 22:41:09,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855935093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:41:09,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:41:09,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:41:09,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359452641] [2022-01-09 22:41:09,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:41:09,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:41:09,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:41:09,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:41:09,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:41:09,209 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-09 22:41:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:41:10,208 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-01-09 22:41:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:41:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-09 22:41:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:41:10,210 INFO L225 Difference]: With dead ends: 35 [2022-01-09 22:41:10,210 INFO L226 Difference]: Without dead ends: 33 [2022-01-09 22:41:10,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:41:10,211 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:41:10,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-09 22:41:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-09 22:41:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-09 22:41:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-09 22:41:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-09 22:41:10,219 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 19 [2022-01-09 22:41:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:41:10,219 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-09 22:41:10,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-09 22:41:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-09 22:41:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-09 22:41:10,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:41:10,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:41:10,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 22:41:10,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:10,443 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:41:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:41:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478750, now seen corresponding path program 1 times [2022-01-09 22:41:10,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:41:10,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403873015] [2022-01-09 22:41:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:10,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:41:10,455 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:41:10,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275862301] [2022-01-09 22:41:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:10,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:10,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:10,457 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:41:10,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 22:41:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:41:10,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-09 22:41:10,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:41:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:41:10,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:41:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:41:10,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:41:10,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403873015] [2022-01-09 22:41:10,802 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:41:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275862301] [2022-01-09 22:41:10,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275862301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:41:10,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:41:10,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-01-09 22:41:10,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652248656] [2022-01-09 22:41:10,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:41:10,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-09 22:41:10,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:41:10,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-09 22:41:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-09 22:41:10,805 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-09 22:41:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:41:10,890 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-01-09 22:41:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 22:41:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-01-09 22:41:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:41:10,891 INFO L225 Difference]: With dead ends: 39 [2022-01-09 22:41:10,891 INFO L226 Difference]: Without dead ends: 34 [2022-01-09 22:41:10,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:41:10,893 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:41:10,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 128 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:41:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-09 22:41:10,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2022-01-09 22:41:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 22:41:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-09 22:41:10,898 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 25 [2022-01-09 22:41:10,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:41:10,899 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-09 22:41:10,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-09 22:41:10,899 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-09 22:41:10,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 22:41:10,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:41:10,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:41:10,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-09 22:41:11,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:11,115 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:41:11,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:41:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash -126969667, now seen corresponding path program 1 times [2022-01-09 22:41:11,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:41:11,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65099123] [2022-01-09 22:41:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:11,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:41:11,124 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:41:11,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355832285] [2022-01-09 22:41:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:11,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:11,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:11,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:41:11,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 22:41:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:41:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-09 22:41:11,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:41:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:41:11,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:41:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:41:11,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:41:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65099123] [2022-01-09 22:41:11,319 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:41:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355832285] [2022-01-09 22:41:11,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355832285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:41:11,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:41:11,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-01-09 22:41:11,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153515771] [2022-01-09 22:41:11,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:41:11,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:41:11,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:41:11,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:41:11,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:41:11,321 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-09 22:41:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:41:11,394 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-01-09 22:41:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-09 22:41:11,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2022-01-09 22:41:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:41:11,398 INFO L225 Difference]: With dead ends: 57 [2022-01-09 22:41:11,398 INFO L226 Difference]: Without dead ends: 52 [2022-01-09 22:41:11,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-09 22:41:11,403 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:41:11,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 106 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:41:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-09 22:41:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-09 22:41:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:41:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-01-09 22:41:11,426 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 28 [2022-01-09 22:41:11,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:41:11,427 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-01-09 22:41:11,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-09 22:41:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-01-09 22:41:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-09 22:41:11,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:41:11,430 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:41:11,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 22:41:11,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:11,646 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:41:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:41:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash 972990450, now seen corresponding path program 2 times [2022-01-09 22:41:11,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:41:11,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059150188] [2022-01-09 22:41:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:11,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:41:11,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:41:11,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979665577] [2022-01-09 22:41:11,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:41:11,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:11,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:11,657 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:41:11,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 22:41:11,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:41:11,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:41:11,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-09 22:41:11,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:41:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:41:11,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:41:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-09 22:41:12,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:41:12,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059150188] [2022-01-09 22:41:12,016 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:41:12,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979665577] [2022-01-09 22:41:12,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979665577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:41:12,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:41:12,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-01-09 22:41:12,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689163161] [2022-01-09 22:41:12,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:41:12,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 22:41:12,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:41:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 22:41:12,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-09 22:41:12,018 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-09 22:41:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:41:12,191 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2022-01-09 22:41:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-09 22:41:12,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 55 [2022-01-09 22:41:12,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:41:12,197 INFO L225 Difference]: With dead ends: 111 [2022-01-09 22:41:12,197 INFO L226 Difference]: Without dead ends: 106 [2022-01-09 22:41:12,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-01-09 22:41:12,200 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:41:12,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 131 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:41:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-09 22:41:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-01-09 22:41:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-09 22:41:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2022-01-09 22:41:12,233 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 55 [2022-01-09 22:41:12,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:41:12,234 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2022-01-09 22:41:12,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-09 22:41:12,234 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2022-01-09 22:41:12,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-09 22:41:12,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:41:12,240 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:41:12,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 22:41:12,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:12,463 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:41:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:41:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1909967598, now seen corresponding path program 3 times [2022-01-09 22:41:12,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:41:12,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564390099] [2022-01-09 22:41:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:12,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:41:12,475 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:41:12,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445788081] [2022-01-09 22:41:12,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:41:12,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:12,484 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:41:12,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 22:41:15,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-09 22:41:15,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:41:15,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-09 22:41:15,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:41:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:41:16,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:41:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-01-09 22:41:16,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:41:16,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564390099] [2022-01-09 22:41:16,443 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:41:16,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445788081] [2022-01-09 22:41:16,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445788081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:41:16,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:41:16,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-01-09 22:41:16,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974613983] [2022-01-09 22:41:16,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:41:16,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-09 22:41:16,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:41:16,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-09 22:41:16,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-01-09 22:41:16,445 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-09 22:41:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:41:16,897 INFO L93 Difference]: Finished difference Result 219 states and 253 transitions. [2022-01-09 22:41:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-09 22:41:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 109 [2022-01-09 22:41:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:41:16,900 INFO L225 Difference]: With dead ends: 219 [2022-01-09 22:41:16,900 INFO L226 Difference]: Without dead ends: 214 [2022-01-09 22:41:16,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-01-09 22:41:16,902 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 251 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:41:16,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 232 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:41:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-09 22:41:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-01-09 22:41:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 165 states have (on average 1.1393939393939394) internal successors, (188), 165 states have internal predecessors, (188), 25 states have call successors, (25), 24 states have call predecessors, (25), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-09 22:41:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 237 transitions. [2022-01-09 22:41:16,934 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 237 transitions. Word has length 109 [2022-01-09 22:41:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:41:16,936 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 237 transitions. [2022-01-09 22:41:16,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-09 22:41:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 237 transitions. [2022-01-09 22:41:16,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-09 22:41:16,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:41:16,943 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:41:16,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 22:41:17,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:17,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:41:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:41:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1216739502, now seen corresponding path program 4 times [2022-01-09 22:41:17,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:41:17,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163503149] [2022-01-09 22:41:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:17,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:41:17,178 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:41:17,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954155170] [2022-01-09 22:41:17,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:41:17,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:17,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:17,180 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:41:17,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 22:41:17,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:41:17,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:41:17,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-09 22:41:17,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:41:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:41:18,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:41:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-01-09 22:41:19,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:41:19,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163503149] [2022-01-09 22:41:19,318 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:41:19,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954155170] [2022-01-09 22:41:19,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954155170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:41:19,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:41:19,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-01-09 22:41:19,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475514241] [2022-01-09 22:41:19,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:41:19,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-09 22:41:19,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:41:19,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-09 22:41:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-01-09 22:41:19,322 INFO L87 Difference]: Start difference. First operand 214 states and 237 transitions. Second operand has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-01-09 22:41:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:41:20,734 INFO L93 Difference]: Finished difference Result 435 states and 505 transitions. [2022-01-09 22:41:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-09 22:41:20,735 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 217 [2022-01-09 22:41:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:41:20,738 INFO L225 Difference]: With dead ends: 435 [2022-01-09 22:41:20,738 INFO L226 Difference]: Without dead ends: 430 [2022-01-09 22:41:20,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-01-09 22:41:20,742 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 692 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:41:20,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 494 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:41:20,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-09 22:41:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2022-01-09 22:41:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 333 states have (on average 1.1411411411411412) internal successors, (380), 333 states have internal predecessors, (380), 49 states have call successors, (49), 48 states have call predecessors, (49), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-09 22:41:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 477 transitions. [2022-01-09 22:41:20,771 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 477 transitions. Word has length 217 [2022-01-09 22:41:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:41:20,771 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 477 transitions. [2022-01-09 22:41:20,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-01-09 22:41:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 477 transitions. [2022-01-09 22:41:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-01-09 22:41:20,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:41:20,778 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:41:20,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 22:41:20,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-09 22:41:20,994 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:41:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:41:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash -623866926, now seen corresponding path program 5 times [2022-01-09 22:41:20,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:41:20,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651429442] [2022-01-09 22:41:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:20,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:41:21,033 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:41:21,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904194773] [2022-01-09 22:41:21,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 22:41:21,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:21,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:21,034 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:41:21,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 22:41:31,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-09 22:41:31,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:41:31,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 95 conjunts are in the unsatisfiable core [2022-01-09 22:41:31,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:41:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:41:33,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:41:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-01-09 22:41:34,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:41:34,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651429442] [2022-01-09 22:41:34,220 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:41:34,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904194773] [2022-01-09 22:41:34,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904194773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:41:34,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:41:34,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 54 [2022-01-09 22:41:34,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211475666] [2022-01-09 22:41:34,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:41:34,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-09 22:41:34,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:41:34,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-09 22:41:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-01-09 22:41:34,224 INFO L87 Difference]: Start difference. First operand 430 states and 477 transitions. Second operand has 54 states, 54 states have (on average 6.592592592592593) internal successors, (356), 54 states have internal predecessors, (356), 51 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 50 states have call predecessors, (96), 50 states have call successors, (96) [2022-01-09 22:41:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:41:35,798 INFO L93 Difference]: Finished difference Result 471 states and 525 transitions. [2022-01-09 22:41:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-09 22:41:35,799 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.592592592592593) internal successors, (356), 54 states have internal predecessors, (356), 51 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 50 states have call predecessors, (96), 50 states have call successors, (96) Word has length 433 [2022-01-09 22:41:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:41:35,802 INFO L225 Difference]: With dead ends: 471 [2022-01-09 22:41:35,802 INFO L226 Difference]: Without dead ends: 466 [2022-01-09 22:41:35,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 913 GetRequests, 811 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3926, Invalid=6580, Unknown=0, NotChecked=0, Total=10506 [2022-01-09 22:41:35,805 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 604 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:41:35,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 535 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:41:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-09 22:41:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2022-01-09 22:41:35,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 361 states have (on average 1.1412742382271468) internal successors, (412), 361 states have internal predecessors, (412), 53 states have call successors, (53), 52 states have call predecessors, (53), 51 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-01-09 22:41:35,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 517 transitions. [2022-01-09 22:41:35,843 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 517 transitions. Word has length 433 [2022-01-09 22:41:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:41:35,843 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 517 transitions. [2022-01-09 22:41:35,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.592592592592593) internal successors, (356), 54 states have internal predecessors, (356), 51 states have call successors, (97), 49 states have call predecessors, (97), 48 states have return successors, (96), 50 states have call predecessors, (96), 50 states have call successors, (96) [2022-01-09 22:41:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 517 transitions. [2022-01-09 22:41:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-01-09 22:41:35,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:41:35,850 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:41:35,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 22:41:36,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:36,062 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:41:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:41:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash -872711022, now seen corresponding path program 6 times [2022-01-09 22:41:36,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:41:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390330778] [2022-01-09 22:41:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:41:36,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:41:36,085 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:41:36,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87670258] [2022-01-09 22:41:36,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 22:41:36,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:41:36,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:41:36,087 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:41:36,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process