/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 13:22:17,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 13:22:17,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 13:22:17,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 13:22:17,565 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-23 13:22:17,604 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 13:22:17,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 13:22:17,604 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-23 13:22:17,604 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-23 13:22:17,605 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 13:22:17,605 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 13:22:17,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 13:22:17,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 13:22:17,605 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 13:22:17,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 13:22:17,605 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 13:22:17,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 13:22:17,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 13:22:17,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 13:22:17,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 13:22:17,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 13:22:17,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 13:22:17,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 13:22:17,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 13:22:17,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 13:22:17,607 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-23 13:22:17,607 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-23 13:22:17,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 13:22:17,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 13:22:17,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 13:22:17,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 13:22:17,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 13:22:17,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 13:22:17,803 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 13:22:17,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-02-23 13:22:17,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d914a655/ecc4f524367f417b8186b72ea0fb4eb5/FLAG252712c78 [2022-02-23 13:22:18,191 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 13:22:18,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-02-23 13:22:18,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d914a655/ecc4f524367f417b8186b72ea0fb4eb5/FLAG252712c78 [2022-02-23 13:22:18,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d914a655/ecc4f524367f417b8186b72ea0fb4eb5 [2022-02-23 13:22:18,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 13:22:18,209 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-23 13:22:18,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 13:22:18,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 13:22:18,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 13:22:18,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:22:18" (1/1) ... [2022-02-23 13:22:18,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5061ee21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18, skipping insertion in model container [2022-02-23 13:22:18,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:22:18" (1/1) ... [2022-02-23 13:22:18,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 13:22:18,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 13:22:18,323 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_unwindbound100.c[524,537] [2022-02-23 13:22:18,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 13:22:18,359 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 13:22:18,371 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_unwindbound100.c[524,537] [2022-02-23 13:22:18,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 13:22:18,382 INFO L208 MainTranslator]: Completed translation [2022-02-23 13:22:18,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18 WrapperNode [2022-02-23 13:22:18,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 13:22:18,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 13:22:18,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 13:22:18,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 13:22:18,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18" (1/1) ... [2022-02-23 13:22:18,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18" (1/1) ... [2022-02-23 13:22:18,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18" (1/1) ... [2022-02-23 13:22:18,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18" (1/1) ... [2022-02-23 13:22:18,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18" (1/1) ... [2022-02-23 13:22:18,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18" (1/1) ... [2022-02-23 13:22:18,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18" (1/1) ... [2022-02-23 13:22:18,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 13:22:18,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 13:22:18,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 13:22:18,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 13:22:18,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18" (1/1) ... [2022-02-23 13:22:18,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 13:22:18,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:18,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 13:22:18,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 13:22:18,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 13:22:18,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 13:22:18,460 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 13:22:18,460 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 13:22:18,460 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 13:22:18,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 13:22:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 13:22:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 13:22:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 13:22:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 13:22:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 13:22:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 13:22:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 13:22:18,460 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 13:22:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 13:22:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 13:22:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 13:22:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 13:22:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 13:22:18,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 13:22:18,509 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 13:22:18,510 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 13:22:18,588 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 13:22:18,592 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 13:22:18,592 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 13:22:18,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:22:18 BoogieIcfgContainer [2022-02-23 13:22:18,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 13:22:18,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 13:22:18,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 13:22:18,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 13:22:18,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:22:18" (1/3) ... [2022-02-23 13:22:18,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2419047e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:22:18, skipping insertion in model container [2022-02-23 13:22:18,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:22:18" (2/3) ... [2022-02-23 13:22:18,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2419047e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:22:18, skipping insertion in model container [2022-02-23 13:22:18,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:22:18" (3/3) ... [2022-02-23 13:22:18,601 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2022-02-23 13:22:18,604 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 13:22:18,604 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 13:22:18,630 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 13:22:18,635 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 13:22:18,635 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 13:22:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 13:22:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 13:22:18,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 13:22:18,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 13:22:18,649 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 13:22:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 13:22:18,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-02-23 13:22:18,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 13:22:18,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554020601] [2022-02-23 13:22:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:18,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 13:22:18,718 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 13:22:18,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466730289] [2022-02-23 13:22:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:18,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 13:22:18,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:18,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 13:22:18,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 13:22:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 13:22:18,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-02-23 13:22:18,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 13:22:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 13:22:18,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 13:22:18,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 13:22:18,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554020601] [2022-02-23 13:22:18,824 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 13:22:18,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466730289] [2022-02-23 13:22:18,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466730289] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 13:22:18,825 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 13:22:18,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-23 13:22:18,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804845558] [2022-02-23 13:22:18,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 13:22:18,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-02-23 13:22:18,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 13:22:18,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-02-23 13:22:18,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-23 13:22:18,866 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 13:22:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 13:22:18,883 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-02-23 13:22:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-23 13:22:18,885 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-23 13:22:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 13:22:18,891 INFO L225 Difference]: With dead ends: 53 [2022-02-23 13:22:18,891 INFO L226 Difference]: Without dead ends: 25 [2022-02-23 13:22:18,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-02-23 13:22:18,899 INFO L933 BasicCegarLoop]: 34 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, 34 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 [2022-02-23 13:22:18,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 13:22:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-23 13:22:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-23 13:22:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 13:22:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-02-23 13:22:18,933 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-02-23 13:22:18,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 13:22:18,933 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-02-23 13:22:18,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 13:22:18,934 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-02-23 13:22:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 13:22:18,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 13:22:18,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 13:22:18,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 13:22:19,141 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 [2022-02-23 13:22:19,144 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 13:22:19,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 13:22:19,144 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-02-23 13:22:19,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 13:22:19,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799671062] [2022-02-23 13:22:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:19,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 13:22:19,163 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 13:22:19,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211948690] [2022-02-23 13:22:19,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:19,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 13:22:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:19,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 13:22:19,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 13:22:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 13:22:19,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 13:22:19,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 13:22:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 13:22:19,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 13:22:19,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 13:22:19,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799671062] [2022-02-23 13:22:19,328 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 13:22:19,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211948690] [2022-02-23 13:22:19,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211948690] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 13:22:19,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 13:22:19,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 13:22:19,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520200675] [2022-02-23 13:22:19,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 13:22:19,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 13:22:19,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 13:22:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 13:22:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 13:22:19,330 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 13:22:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 13:22:19,351 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-02-23 13:22:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 13:22:19,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 13:22:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 13:22:19,353 INFO L225 Difference]: With dead ends: 34 [2022-02-23 13:22:19,353 INFO L226 Difference]: Without dead ends: 27 [2022-02-23 13:22:19,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 13:22:19,354 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 13:22:19,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 13:22:19,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-23 13:22:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-23 13:22:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 13:22:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-23 13:22:19,362 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-02-23 13:22:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 13:22:19,364 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-23 13:22:19,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 13:22:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-23 13:22:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 13:22:19,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 13:22:19,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 13:22:19,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-23 13:22:19,581 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 [2022-02-23 13:22:19,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 13:22:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 13:22:19,582 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-02-23 13:22:19,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 13:22:19,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245731188] [2022-02-23 13:22:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:19,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 13:22:19,598 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 13:22:19,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239679596] [2022-02-23 13:22:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:19,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 13:22:19,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:19,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 13:22:19,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 13:22:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 13:22:19,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 13:22:19,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 13:22:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 13:22:19,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 13:22:19,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 13:22:19,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245731188] [2022-02-23 13:22:19,991 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 13:22:19,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239679596] [2022-02-23 13:22:19,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239679596] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 13:22:19,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 13:22:19,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 13:22:19,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212422603] [2022-02-23 13:22:19,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 13:22:19,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 13:22:19,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 13:22:19,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 13:22:19,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 13:22:19,993 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 13:22:22,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 13:22:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 13:22:22,040 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-02-23 13:22:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 13:22:22,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-02-23 13:22:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 13:22:22,042 INFO L225 Difference]: With dead ends: 37 [2022-02-23 13:22:22,042 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 13:22:22,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 13:22:22,043 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-23 13:22:22,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-02-23 13:22:22,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 13:22:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-02-23 13:22:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 13:22:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-02-23 13:22:22,049 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-02-23 13:22:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 13:22:22,050 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-02-23 13:22:22,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 13:22:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-02-23 13:22:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 13:22:22,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 13:22:22,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 13:22:22,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 13:22:22,280 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 [2022-02-23 13:22:22,281 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 13:22:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 13:22:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-02-23 13:22:22,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 13:22:22,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813150850] [2022-02-23 13:22:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:22,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 13:22:22,289 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 13:22:22,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842763282] [2022-02-23 13:22:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:22,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 13:22:22,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:22,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 13:22:22,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 13:22:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 13:22:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 13:22:22,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 13:22:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 13:22:22,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 13:22:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 13:22:22,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 13:22:22,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813150850] [2022-02-23 13:22:22,607 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 13:22:22,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842763282] [2022-02-23 13:22:22,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842763282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 13:22:22,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 13:22:22,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-02-23 13:22:22,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172191830] [2022-02-23 13:22:22,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 13:22:22,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 13:22:22,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 13:22:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 13:22:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-23 13:22:22,611 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 13:22:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 13:22:22,680 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-02-23 13:22:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 13:22:22,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-02-23 13:22:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 13:22:22,684 INFO L225 Difference]: With dead ends: 39 [2022-02-23 13:22:22,684 INFO L226 Difference]: Without dead ends: 34 [2022-02-23 13:22:22,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-23 13:22:22,690 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 13:22:22,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 112 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 13:22:22,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-23 13:22:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-02-23 13:22:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 13:22:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-02-23 13:22:22,701 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-02-23 13:22:22,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 13:22:22,702 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-02-23 13:22:22,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 13:22:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-02-23 13:22:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 13:22:22,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 13:22:22,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 13:22:22,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 13:22:22,911 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 [2022-02-23 13:22:22,911 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 13:22:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 13:22:22,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-02-23 13:22:22,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 13:22:22,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638476418] [2022-02-23 13:22:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:22,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 13:22:22,919 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 13:22:22,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386935977] [2022-02-23 13:22:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:22,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 13:22:22,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:22,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 13:22:22,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 13:22:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 13:22:22,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 13:22:22,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 13:22:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 13:22:23,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 13:22:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 13:22:23,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 13:22:23,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638476418] [2022-02-23 13:22:23,092 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 13:22:23,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386935977] [2022-02-23 13:22:23,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386935977] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 13:22:23,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 13:22:23,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 13:22:23,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077835229] [2022-02-23 13:22:23,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 13:22:23,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 13:22:23,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 13:22:23,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 13:22:23,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 13:22:23,094 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-23 13:22:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 13:22:23,147 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-02-23 13:22:23,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 13:22:23,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2022-02-23 13:22:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 13:22:23,148 INFO L225 Difference]: With dead ends: 61 [2022-02-23 13:22:23,148 INFO L226 Difference]: Without dead ends: 56 [2022-02-23 13:22:23,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 13:22:23,148 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 13:22:23,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 13:22:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-23 13:22:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-23 13:22:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 13:22:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-02-23 13:22:23,155 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2022-02-23 13:22:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 13:22:23,156 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-02-23 13:22:23,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-02-23 13:22:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-02-23 13:22:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-23 13:22:23,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 13:22:23,157 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, 1, 1, 1, 1] [2022-02-23 13:22:23,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 13:22:23,371 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 [2022-02-23 13:22:23,371 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 13:22:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 13:22:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 2 times [2022-02-23 13:22:23,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 13:22:23,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855405356] [2022-02-23 13:22:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:23,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 13:22:23,386 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 13:22:23,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981142793] [2022-02-23 13:22:23,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 13:22:23,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 13:22:23,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:23,387 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 13:22:23,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 13:22:23,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 13:22:23,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 13:22:23,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 13:22:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 13:22:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 13:22:23,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 13:22:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 13:22:23,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 13:22:23,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855405356] [2022-02-23 13:22:23,701 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 13:22:23,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981142793] [2022-02-23 13:22:23,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981142793] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 13:22:23,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 13:22:23,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 13:22:23,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193827258] [2022-02-23 13:22:23,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 13:22:23,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 13:22:23,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 13:22:23,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 13:22:23,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 13:22:23,702 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-23 13:22:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 13:22:23,834 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2022-02-23 13:22:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 13:22:23,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-02-23 13:22:23,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 13:22:23,836 INFO L225 Difference]: With dead ends: 115 [2022-02-23 13:22:23,836 INFO L226 Difference]: Without dead ends: 110 [2022-02-23 13:22:23,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-23 13:22:23,837 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 13:22:23,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 148 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 13:22:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-23 13:22:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-02-23 13:22:23,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 13:22:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-02-23 13:22:23,859 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 59 [2022-02-23 13:22:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 13:22:23,859 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-02-23 13:22:23,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-02-23 13:22:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-02-23 13:22:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-23 13:22:23,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 13:22:23,861 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, 1, 1, 1, 1] [2022-02-23 13:22:23,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 13:22:24,061 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 [2022-02-23 13:22:24,062 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 13:22:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 13:22:24,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 3 times [2022-02-23 13:22:24,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 13:22:24,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113549666] [2022-02-23 13:22:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:24,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 13:22:24,071 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 13:22:24,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496538390] [2022-02-23 13:22:24,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 13:22:24,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 13:22:24,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:24,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 13:22:24,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 13:22:26,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-23 13:22:26,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 13:22:26,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 13:22:26,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 13:22:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 13:22:26,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 13:22:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-02-23 13:22:26,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 13:22:26,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113549666] [2022-02-23 13:22:26,670 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 13:22:26,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496538390] [2022-02-23 13:22:26,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496538390] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 13:22:26,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 13:22:26,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-02-23 13:22:26,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975222401] [2022-02-23 13:22:26,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 13:22:26,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 13:22:26,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 13:22:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 13:22:26,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-23 13:22:26,672 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-02-23 13:22:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 13:22:27,020 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2022-02-23 13:22:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-23 13:22:27,020 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 113 [2022-02-23 13:22:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 13:22:27,022 INFO L225 Difference]: With dead ends: 223 [2022-02-23 13:22:27,022 INFO L226 Difference]: Without dead ends: 218 [2022-02-23 13:22:27,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-02-23 13:22:27,023 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 218 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 13:22:27,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 256 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 13:22:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-23 13:22:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-02-23 13:22:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 13:22:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-02-23 13:22:27,042 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 113 [2022-02-23 13:22:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 13:22:27,042 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-02-23 13:22:27,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-02-23 13:22:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-02-23 13:22:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-02-23 13:22:27,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 13:22:27,045 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, 1, 1, 1, 1] [2022-02-23 13:22:27,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 13:22:27,261 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 [2022-02-23 13:22:27,262 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 13:22:27,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 13:22:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 4 times [2022-02-23 13:22:27,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 13:22:27,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954941635] [2022-02-23 13:22:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:27,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 13:22:27,273 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 13:22:27,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064133106] [2022-02-23 13:22:27,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 13:22:27,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 13:22:27,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:27,277 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 13:22:27,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 13:22:27,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 13:22:27,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 13:22:27,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-23 13:22:27,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 13:22:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 13:22:28,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 13:22:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-02-23 13:22:28,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 13:22:28,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954941635] [2022-02-23 13:22:28,951 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 13:22:28,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064133106] [2022-02-23 13:22:28,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064133106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 13:22:28,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 13:22:28,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-02-23 13:22:28,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921530570] [2022-02-23 13:22:28,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 13:22:28,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-23 13:22:28,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 13:22:28,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-23 13:22:28,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 13:22:28,954 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-02-23 13:22:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 13:22:30,139 INFO L93 Difference]: Finished difference Result 439 states and 509 transitions. [2022-02-23 13:22:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-23 13:22:30,140 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 221 [2022-02-23 13:22:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 13:22:30,144 INFO L225 Difference]: With dead ends: 439 [2022-02-23 13:22:30,144 INFO L226 Difference]: Without dead ends: 434 [2022-02-23 13:22:30,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-02-23 13:22:30,147 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 725 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 13:22:30,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 518 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 13:22:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-02-23 13:22:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-02-23 13:22:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-02-23 13:22:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-02-23 13:22:30,177 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 221 [2022-02-23 13:22:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 13:22:30,178 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-02-23 13:22:30,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-02-23 13:22:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-02-23 13:22:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-02-23 13:22:30,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 13:22:30,182 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, 1, 1, 1, 1] [2022-02-23 13:22:30,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 13:22:30,383 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 [2022-02-23 13:22:30,383 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 13:22:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 13:22:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 5 times [2022-02-23 13:22:30,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 13:22:30,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181847007] [2022-02-23 13:22:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:30,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 13:22:30,398 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 13:22:30,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227666452] [2022-02-23 13:22:30,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 13:22:30,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 13:22:30,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:30,400 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 13:22:30,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 13:22:32,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-02-23 13:22:32,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 13:22:32,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 97 conjunts are in the unsatisfiable core [2022-02-23 13:22:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 13:22:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 13:22:33,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 13:22:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-02-23 13:22:36,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 13:22:36,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181847007] [2022-02-23 13:22:36,472 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 13:22:36,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227666452] [2022-02-23 13:22:36,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227666452] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 13:22:36,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 13:22:36,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-02-23 13:22:36,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878629658] [2022-02-23 13:22:36,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 13:22:36,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-23 13:22:36,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 13:22:36,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-23 13:22:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-02-23 13:22:36,476 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-02-23 13:22:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 13:22:40,338 INFO L93 Difference]: Finished difference Result 871 states and 1013 transitions. [2022-02-23 13:22:40,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-02-23 13:22:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) Word has length 437 [2022-02-23 13:22:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 13:22:40,351 INFO L225 Difference]: With dead ends: 871 [2022-02-23 13:22:40,351 INFO L226 Difference]: Without dead ends: 866 [2022-02-23 13:22:40,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-02-23 13:22:40,358 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 1515 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 13:22:40,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 974 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 13:22:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-02-23 13:22:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2022-02-23 13:22:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 670 states have (on average 1.1417910447761195) internal successors, (765), 670 states have internal predecessors, (765), 99 states have call successors, (99), 98 states have call predecessors, (99), 96 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-02-23 13:22:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 961 transitions. [2022-02-23 13:22:40,401 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 961 transitions. Word has length 437 [2022-02-23 13:22:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 13:22:40,403 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 961 transitions. [2022-02-23 13:22:40,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-02-23 13:22:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 961 transitions. [2022-02-23 13:22:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-02-23 13:22:40,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 13:22:40,423 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 13:22:40,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 13:22:40,632 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 [2022-02-23 13:22:40,632 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 13:22:40,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 13:22:40,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2015680598, now seen corresponding path program 6 times [2022-02-23 13:22:40,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 13:22:40,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921047305] [2022-02-23 13:22:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 13:22:40,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 13:22:40,665 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 13:22:40,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372664746] [2022-02-23 13:22:40,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 13:22:40,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 13:22:40,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 13:22:40,667 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 13:22:40,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process