/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:16:37,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:16:37,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:16:37,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:16:37,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:16:37,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:16:37,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:16:37,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:16:37,255 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:16:37,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:16:37,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:16:37,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:16:37,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:16:37,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:16:37,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:16:37,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:16:37,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:16:37,261 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:16:37,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:16:37,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:16:37,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:16:37,261 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:16:37,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:16:37,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:16:37,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:16:37,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:16:37,263 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:16:37,263 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:16:37,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:16:37,267 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:16:37,267 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:16:37,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:16:37,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:16:37,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:16:37,778 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:16:37,779 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:16:37,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c [2022-03-20 18:16:37,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/940e59399/b628b278d66a4c1eb1efd09d8f4bece4/FLAGf3c35fadb [2022-03-20 18:16:38,641 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:16:38,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c [2022-03-20 18:16:38,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/940e59399/b628b278d66a4c1eb1efd09d8f4bece4/FLAGf3c35fadb [2022-03-20 18:16:38,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/940e59399/b628b278d66a4c1eb1efd09d8f4bece4 [2022-03-20 18:16:38,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:16:38,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:16:38,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:16:38,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:16:38,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:16:38,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:16:38" (1/1) ... [2022-03-20 18:16:38,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3910f74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:38, skipping insertion in model container [2022-03-20 18:16:38,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:16:38" (1/1) ... [2022-03-20 18:16:38,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:16:39,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:16:39,464 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c[6448,6461] [2022-03-20 18:16:39,545 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:16:39,554 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:16:39,600 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c[6448,6461] [2022-03-20 18:16:39,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:16:39,644 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:16:39,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:39 WrapperNode [2022-03-20 18:16:39,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:16:39,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:16:39,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:16:39,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:16:39,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:39" (1/1) ... [2022-03-20 18:16:39,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:39" (1/1) ... [2022-03-20 18:16:39,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:39" (1/1) ... [2022-03-20 18:16:39,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:39" (1/1) ... [2022-03-20 18:16:39,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:39" (1/1) ... [2022-03-20 18:16:39,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:39" (1/1) ... [2022-03-20 18:16:39,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:39" (1/1) ... [2022-03-20 18:16:39,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:16:39,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:16:39,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:16:39,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:16:39,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:39" (1/1) ... [2022-03-20 18:16:39,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:16:39,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:16:39,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 18:16:39,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 18:16:39,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:16:39,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:16:39,776 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:16:39,776 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 18:16:39,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:16:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:16:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:16:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:16:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:16:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 18:16:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:16:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:16:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:16:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:16:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:16:39,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:16:39,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:16:39,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:16:39,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:16:39,838 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:16:39,839 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:16:40,343 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:16:40,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:16:40,351 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-20 18:16:40,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:16:40 BoogieIcfgContainer [2022-03-20 18:16:40,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:16:40,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:16:40,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:16:40,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:16:40,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:16:38" (1/3) ... [2022-03-20 18:16:40,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df1133f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:16:40, skipping insertion in model container [2022-03-20 18:16:40,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:16:39" (2/3) ... [2022-03-20 18:16:40,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df1133f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:16:40, skipping insertion in model container [2022-03-20 18:16:40,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:16:40" (3/3) ... [2022-03-20 18:16:40,363 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+nlh-reducer.c [2022-03-20 18:16:40,368 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:16:40,368 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:16:40,407 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:16:40,417 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 18:16:40,418 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:16:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 143 states have (on average 1.965034965034965) internal successors, (281), 144 states have internal predecessors, (281), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:16:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:40,455 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:40,455 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:40,456 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash -226504135, now seen corresponding path program 1 times [2022-03-20 18:16:40,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:40,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2002026549] [2022-03-20 18:16:40,479 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash -226504135, now seen corresponding path program 2 times [2022-03-20 18:16:40,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:40,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420479011] [2022-03-20 18:16:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:40,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:40,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:40,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:40,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420479011] [2022-03-20 18:16:40,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420479011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:40,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:40,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 18:16:40,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:40,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2002026549] [2022-03-20 18:16:40,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2002026549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:40,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:40,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 18:16:40,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123826764] [2022-03-20 18:16:40,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:40,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 18:16:40,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:40,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 18:16:40,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 18:16:40,811 INFO L87 Difference]: Start difference. First operand has 149 states, 143 states have (on average 1.965034965034965) internal successors, (281), 144 states have internal predecessors, (281), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:41,419 INFO L93 Difference]: Finished difference Result 292 states and 562 transitions. [2022-03-20 18:16:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 18:16:41,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:41,429 INFO L225 Difference]: With dead ends: 292 [2022-03-20 18:16:41,430 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 18:16:41,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-20 18:16:41,437 INFO L913 BasicCegarLoop]: 211 mSDtfsCounter, 271 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:41,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 226 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:16:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 18:16:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-20 18:16:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 141 states have (on average 1.475177304964539) internal successors, (208), 141 states have internal predecessors, (208), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 211 transitions. [2022-03-20 18:16:41,486 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 211 transitions. Word has length 143 [2022-03-20 18:16:41,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:41,487 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 211 transitions. [2022-03-20 18:16:41,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 211 transitions. [2022-03-20 18:16:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:41,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:41,490 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:41,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:16:41,490 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:41,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1788930742, now seen corresponding path program 1 times [2022-03-20 18:16:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:41,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [464936166] [2022-03-20 18:16:41,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1788930742, now seen corresponding path program 2 times [2022-03-20 18:16:41,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:41,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103030452] [2022-03-20 18:16:41,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:41,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:41,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:41,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:41,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103030452] [2022-03-20 18:16:41,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103030452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:41,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:41,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:16:41,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:41,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [464936166] [2022-03-20 18:16:41,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [464936166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:41,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:41,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:16:41,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967445859] [2022-03-20 18:16:41,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:41,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 18:16:41,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:41,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 18:16:41,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 18:16:41,582 INFO L87 Difference]: Start difference. First operand 145 states and 211 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:42,065 INFO L93 Difference]: Finished difference Result 406 states and 602 transitions. [2022-03-20 18:16:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 18:16:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:42,068 INFO L225 Difference]: With dead ends: 406 [2022-03-20 18:16:42,068 INFO L226 Difference]: Without dead ends: 275 [2022-03-20 18:16:42,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 18:16:42,070 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 339 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:42,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 87 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-20 18:16:42,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-03-20 18:16:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 271 states have (on average 1.2509225092250922) internal successors, (339), 271 states have internal predecessors, (339), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 342 transitions. [2022-03-20 18:16:42,118 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 342 transitions. Word has length 143 [2022-03-20 18:16:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:42,118 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 342 transitions. [2022-03-20 18:16:42,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 342 transitions. [2022-03-20 18:16:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:42,121 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:42,122 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:42,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 18:16:42,122 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash 245018630, now seen corresponding path program 1 times [2022-03-20 18:16:42,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:42,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1664160239] [2022-03-20 18:16:42,124 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash 245018630, now seen corresponding path program 2 times [2022-03-20 18:16:42,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:42,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271635555] [2022-03-20 18:16:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:42,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:42,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271635555] [2022-03-20 18:16:42,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271635555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:42,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:42,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:16:42,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:42,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1664160239] [2022-03-20 18:16:42,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1664160239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:42,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:42,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:16:42,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963687612] [2022-03-20 18:16:42,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:42,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 18:16:42,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:42,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 18:16:42,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 18:16:42,361 INFO L87 Difference]: Start difference. First operand 275 states and 342 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:42,733 INFO L93 Difference]: Finished difference Result 406 states and 473 transitions. [2022-03-20 18:16:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 18:16:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:42,736 INFO L225 Difference]: With dead ends: 406 [2022-03-20 18:16:42,736 INFO L226 Difference]: Without dead ends: 273 [2022-03-20 18:16:42,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-20 18:16:42,738 INFO L913 BasicCegarLoop]: 204 mSDtfsCounter, 205 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:42,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 216 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-20 18:16:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2022-03-20 18:16:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 269 states have (on average 1.2490706319702602) internal successors, (336), 269 states have internal predecessors, (336), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:42,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 339 transitions. [2022-03-20 18:16:42,763 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 339 transitions. Word has length 143 [2022-03-20 18:16:42,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:42,793 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 339 transitions. [2022-03-20 18:16:42,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:42,793 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 339 transitions. [2022-03-20 18:16:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:42,796 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:42,796 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:42,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 18:16:42,797 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:42,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:42,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1669664994, now seen corresponding path program 1 times [2022-03-20 18:16:42,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:42,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1308362965] [2022-03-20 18:16:42,799 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1669664994, now seen corresponding path program 2 times [2022-03-20 18:16:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:42,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280565059] [2022-03-20 18:16:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:42,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:42,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:42,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280565059] [2022-03-20 18:16:42,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280565059] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:42,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:42,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:42,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:42,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1308362965] [2022-03-20 18:16:42,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1308362965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:42,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:42,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:16:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152604555] [2022-03-20 18:16:42,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:42,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 18:16:42,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:42,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 18:16:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 18:16:42,899 INFO L87 Difference]: Start difference. First operand 273 states and 339 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:43,436 INFO L93 Difference]: Finished difference Result 400 states and 466 transitions. [2022-03-20 18:16:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:16:43,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:43,438 INFO L225 Difference]: With dead ends: 400 [2022-03-20 18:16:43,438 INFO L226 Difference]: Without dead ends: 269 [2022-03-20 18:16:43,441 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-03-20 18:16:43,447 INFO L913 BasicCegarLoop]: 198 mSDtfsCounter, 203 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:43,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 220 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-20 18:16:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-03-20 18:16:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 265 states have (on average 1.2452830188679245) internal successors, (330), 265 states have internal predecessors, (330), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2022-03-20 18:16:43,474 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 143 [2022-03-20 18:16:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:43,474 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2022-03-20 18:16:43,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2022-03-20 18:16:43,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:43,479 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:43,479 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:43,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 18:16:43,480 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:43,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1509197206, now seen corresponding path program 1 times [2022-03-20 18:16:43,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:43,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [837672513] [2022-03-20 18:16:43,486 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:43,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1509197206, now seen corresponding path program 2 times [2022-03-20 18:16:43,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:43,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024128943] [2022-03-20 18:16:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:43,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:43,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:43,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:43,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024128943] [2022-03-20 18:16:43,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024128943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:43,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:43,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:16:43,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:43,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [837672513] [2022-03-20 18:16:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [837672513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:43,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:43,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:16:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730144819] [2022-03-20 18:16:43,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:43,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:16:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:16:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 18:16:43,629 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:44,246 INFO L93 Difference]: Finished difference Result 392 states and 456 transitions. [2022-03-20 18:16:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:16:44,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:44,248 INFO L225 Difference]: With dead ends: 392 [2022-03-20 18:16:44,248 INFO L226 Difference]: Without dead ends: 265 [2022-03-20 18:16:44,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:16:44,249 INFO L913 BasicCegarLoop]: 192 mSDtfsCounter, 202 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:44,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 219 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:16:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-20 18:16:44,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-03-20 18:16:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 261 states have (on average 1.2413793103448276) internal successors, (324), 261 states have internal predecessors, (324), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:44,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 327 transitions. [2022-03-20 18:16:44,264 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 327 transitions. Word has length 143 [2022-03-20 18:16:44,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:44,264 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 327 transitions. [2022-03-20 18:16:44,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:44,265 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 327 transitions. [2022-03-20 18:16:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:44,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:44,266 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:44,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 18:16:44,266 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:44,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:44,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1430239655, now seen corresponding path program 1 times [2022-03-20 18:16:44,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:44,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [758078201] [2022-03-20 18:16:44,268 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:44,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1430239655, now seen corresponding path program 2 times [2022-03-20 18:16:44,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:44,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280331412] [2022-03-20 18:16:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:44,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:44,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:44,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:44,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280331412] [2022-03-20 18:16:44,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280331412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:44,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:44,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:16:44,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:44,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [758078201] [2022-03-20 18:16:44,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [758078201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:44,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:44,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:16:44,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487278894] [2022-03-20 18:16:44,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:44,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:16:44,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:44,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:16:44,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-20 18:16:44,394 INFO L87 Difference]: Start difference. First operand 265 states and 327 transitions. Second operand has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:45,137 INFO L93 Difference]: Finished difference Result 382 states and 444 transitions. [2022-03-20 18:16:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:16:45,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:45,139 INFO L225 Difference]: With dead ends: 382 [2022-03-20 18:16:45,139 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 18:16:45,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-03-20 18:16:45,141 INFO L913 BasicCegarLoop]: 183 mSDtfsCounter, 199 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:45,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 220 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:16:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 18:16:45,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-03-20 18:16:45,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 255 states have (on average 1.2352941176470589) internal successors, (315), 255 states have internal predecessors, (315), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:45,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 318 transitions. [2022-03-20 18:16:45,153 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 318 transitions. Word has length 143 [2022-03-20 18:16:45,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:45,153 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 318 transitions. [2022-03-20 18:16:45,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 318 transitions. [2022-03-20 18:16:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:45,155 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:45,155 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:45,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 18:16:45,155 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:45,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1823886761, now seen corresponding path program 1 times [2022-03-20 18:16:45,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:45,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742113451] [2022-03-20 18:16:45,156 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:45,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1823886761, now seen corresponding path program 2 times [2022-03-20 18:16:45,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:45,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007624658] [2022-03-20 18:16:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:45,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:45,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:45,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007624658] [2022-03-20 18:16:45,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007624658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:45,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:45,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:16:45,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:45,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742113451] [2022-03-20 18:16:45,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742113451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:45,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:45,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:16:45,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353688323] [2022-03-20 18:16:45,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:45,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:16:45,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:45,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:16:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-03-20 18:16:45,300 INFO L87 Difference]: Start difference. First operand 259 states and 318 transitions. Second operand has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:45,802 INFO L93 Difference]: Finished difference Result 372 states and 431 transitions. [2022-03-20 18:16:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:16:45,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:45,804 INFO L225 Difference]: With dead ends: 372 [2022-03-20 18:16:45,804 INFO L226 Difference]: Without dead ends: 255 [2022-03-20 18:16:45,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:16:45,806 INFO L913 BasicCegarLoop]: 177 mSDtfsCounter, 207 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:45,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 194 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:45,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-20 18:16:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-03-20 18:16:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 251 states have (on average 1.2310756972111554) internal successors, (309), 251 states have internal predecessors, (309), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 312 transitions. [2022-03-20 18:16:45,818 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 312 transitions. Word has length 143 [2022-03-20 18:16:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:45,818 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 312 transitions. [2022-03-20 18:16:45,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 312 transitions. [2022-03-20 18:16:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:45,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:45,820 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:45,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 18:16:45,820 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1370409666, now seen corresponding path program 1 times [2022-03-20 18:16:45,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:45,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467450775] [2022-03-20 18:16:45,822 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:45,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1370409666, now seen corresponding path program 2 times [2022-03-20 18:16:45,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:45,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743496774] [2022-03-20 18:16:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:45,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:45,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:45,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:45,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743496774] [2022-03-20 18:16:45,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743496774] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:45,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:45,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:16:45,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:45,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467450775] [2022-03-20 18:16:45,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467450775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:45,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:45,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:16:45,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847486564] [2022-03-20 18:16:45,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:45,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:16:45,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:45,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:16:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:16:45,977 INFO L87 Difference]: Start difference. First operand 255 states and 312 transitions. Second operand has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:46,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:46,659 INFO L93 Difference]: Finished difference Result 366 states and 423 transitions. [2022-03-20 18:16:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:16:46,660 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:46,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:46,661 INFO L225 Difference]: With dead ends: 366 [2022-03-20 18:16:46,661 INFO L226 Difference]: Without dead ends: 253 [2022-03-20 18:16:46,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-03-20 18:16:46,663 INFO L913 BasicCegarLoop]: 174 mSDtfsCounter, 205 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:46,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 201 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:16:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-20 18:16:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-03-20 18:16:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 249 states have (on average 1.2289156626506024) internal successors, (306), 249 states have internal predecessors, (306), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 309 transitions. [2022-03-20 18:16:46,677 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 309 transitions. Word has length 143 [2022-03-20 18:16:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:46,677 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 309 transitions. [2022-03-20 18:16:46,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:46,678 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 309 transitions. [2022-03-20 18:16:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:46,679 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:46,679 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:46,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 18:16:46,680 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1524671279, now seen corresponding path program 1 times [2022-03-20 18:16:46,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:46,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219888971] [2022-03-20 18:16:46,681 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:46,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1524671279, now seen corresponding path program 2 times [2022-03-20 18:16:46,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:46,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329451779] [2022-03-20 18:16:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:46,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:46,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:46,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:46,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329451779] [2022-03-20 18:16:46,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329451779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:46,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:46,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:16:46,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:46,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219888971] [2022-03-20 18:16:46,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219888971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:46,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:46,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:16:46,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500790493] [2022-03-20 18:16:46,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:46,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:16:46,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:46,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:16:46,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:16:46,871 INFO L87 Difference]: Start difference. First operand 253 states and 309 transitions. Second operand has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:47,581 INFO L93 Difference]: Finished difference Result 362 states and 418 transitions. [2022-03-20 18:16:47,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:16:47,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:47,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:47,583 INFO L225 Difference]: With dead ends: 362 [2022-03-20 18:16:47,583 INFO L226 Difference]: Without dead ends: 251 [2022-03-20 18:16:47,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:16:47,584 INFO L913 BasicCegarLoop]: 171 mSDtfsCounter, 205 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:47,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 203 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:16:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-20 18:16:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-03-20 18:16:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.2267206477732793) internal successors, (303), 247 states have internal predecessors, (303), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 306 transitions. [2022-03-20 18:16:47,596 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 306 transitions. Word has length 143 [2022-03-20 18:16:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:47,598 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 306 transitions. [2022-03-20 18:16:47,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 306 transitions. [2022-03-20 18:16:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:47,600 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:47,600 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:47,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 18:16:47,600 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash 512357033, now seen corresponding path program 1 times [2022-03-20 18:16:47,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:47,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1723974684] [2022-03-20 18:16:47,601 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 512357033, now seen corresponding path program 2 times [2022-03-20 18:16:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:47,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793727908] [2022-03-20 18:16:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:47,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:47,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:47,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:47,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793727908] [2022-03-20 18:16:47,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793727908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:47,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:47,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:16:47,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:47,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1723974684] [2022-03-20 18:16:47,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1723974684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:47,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:47,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:16:47,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852379306] [2022-03-20 18:16:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:47,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:16:47,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:16:47,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-03-20 18:16:47,835 INFO L87 Difference]: Start difference. First operand 251 states and 306 transitions. Second operand has 21 states, 21 states have (on average 6.666666666666667) internal successors, (140), 20 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:48,413 INFO L93 Difference]: Finished difference Result 352 states and 407 transitions. [2022-03-20 18:16:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:16:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.666666666666667) internal successors, (140), 20 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:48,415 INFO L225 Difference]: With dead ends: 352 [2022-03-20 18:16:48,415 INFO L226 Difference]: Without dead ends: 243 [2022-03-20 18:16:48,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:16:48,417 INFO L913 BasicCegarLoop]: 159 mSDtfsCounter, 218 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:48,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 176 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-20 18:16:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-03-20 18:16:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 239 states have (on average 1.217573221757322) internal successors, (291), 239 states have internal predecessors, (291), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 294 transitions. [2022-03-20 18:16:48,449 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 294 transitions. Word has length 143 [2022-03-20 18:16:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:48,449 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 294 transitions. [2022-03-20 18:16:48,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.666666666666667) internal successors, (140), 20 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 294 transitions. [2022-03-20 18:16:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:48,450 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:48,450 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:48,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 18:16:48,451 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:48,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1151655290, now seen corresponding path program 1 times [2022-03-20 18:16:48,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:48,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [822446917] [2022-03-20 18:16:48,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1151655290, now seen corresponding path program 2 times [2022-03-20 18:16:48,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:48,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930709498] [2022-03-20 18:16:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:48,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:48,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:48,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:48,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930709498] [2022-03-20 18:16:48,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930709498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:48,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:48,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:16:48,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:48,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [822446917] [2022-03-20 18:16:48,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [822446917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:48,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:48,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:16:48,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845548760] [2022-03-20 18:16:48,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:48,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:16:48,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:48,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:16:48,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:16:48,710 INFO L87 Difference]: Start difference. First operand 243 states and 294 transitions. Second operand has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 21 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:49,259 INFO L93 Difference]: Finished difference Result 342 states and 393 transitions. [2022-03-20 18:16:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:16:49,260 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 21 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:49,261 INFO L225 Difference]: With dead ends: 342 [2022-03-20 18:16:49,261 INFO L226 Difference]: Without dead ends: 241 [2022-03-20 18:16:49,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 18:16:49,262 INFO L913 BasicCegarLoop]: 156 mSDtfsCounter, 224 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:49,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 168 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-20 18:16:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-03-20 18:16:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 237 states have (on average 1.2151898734177216) internal successors, (288), 237 states have internal predecessors, (288), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:49,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 291 transitions. [2022-03-20 18:16:49,273 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 291 transitions. Word has length 143 [2022-03-20 18:16:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:49,273 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 291 transitions. [2022-03-20 18:16:49,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 21 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 291 transitions. [2022-03-20 18:16:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:49,275 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:49,275 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:49,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 18:16:49,275 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2019048926, now seen corresponding path program 1 times [2022-03-20 18:16:49,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:49,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1092578919] [2022-03-20 18:16:49,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2019048926, now seen corresponding path program 2 times [2022-03-20 18:16:49,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:49,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064863229] [2022-03-20 18:16:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:49,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:49,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:49,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:49,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064863229] [2022-03-20 18:16:49,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064863229] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:49,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:49,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:16:49,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:49,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1092578919] [2022-03-20 18:16:49,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1092578919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:49,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:49,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:16:49,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687178723] [2022-03-20 18:16:49,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:49,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:16:49,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:49,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:16:49,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:16:49,537 INFO L87 Difference]: Start difference. First operand 241 states and 291 transitions. Second operand has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 23 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:50,265 INFO L93 Difference]: Finished difference Result 336 states and 386 transitions. [2022-03-20 18:16:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:16:50,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 23 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:50,267 INFO L225 Difference]: With dead ends: 336 [2022-03-20 18:16:50,267 INFO L226 Difference]: Without dead ends: 237 [2022-03-20 18:16:50,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:16:50,269 INFO L913 BasicCegarLoop]: 150 mSDtfsCounter, 213 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:50,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 172 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:16:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-20 18:16:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-03-20 18:16:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 233 states have (on average 1.2103004291845494) internal successors, (282), 233 states have internal predecessors, (282), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 285 transitions. [2022-03-20 18:16:50,281 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 285 transitions. Word has length 143 [2022-03-20 18:16:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:50,282 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 285 transitions. [2022-03-20 18:16:50,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.833333333333333) internal successors, (140), 23 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:50,282 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 285 transitions. [2022-03-20 18:16:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:50,283 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:50,283 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:50,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 18:16:50,284 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash -642501226, now seen corresponding path program 1 times [2022-03-20 18:16:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:50,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1946780594] [2022-03-20 18:16:50,286 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:50,286 INFO L85 PathProgramCache]: Analyzing trace with hash -642501226, now seen corresponding path program 2 times [2022-03-20 18:16:50,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:50,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849325843] [2022-03-20 18:16:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:50,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:50,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:50,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:50,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849325843] [2022-03-20 18:16:50,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849325843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:50,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:50,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:16:50,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:50,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1946780594] [2022-03-20 18:16:50,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1946780594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:50,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:50,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:16:50,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312343467] [2022-03-20 18:16:50,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:50,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:16:50,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:50,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:16:50,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:16:50,713 INFO L87 Difference]: Start difference. First operand 237 states and 285 transitions. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:51,892 INFO L93 Difference]: Finished difference Result 328 states and 376 transitions. [2022-03-20 18:16:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 18:16:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:51,893 INFO L225 Difference]: With dead ends: 328 [2022-03-20 18:16:51,893 INFO L226 Difference]: Without dead ends: 233 [2022-03-20 18:16:51,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:16:51,895 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 215 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:51,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 171 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:16:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-20 18:16:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2022-03-20 18:16:51,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.205240174672489) internal successors, (276), 229 states have internal predecessors, (276), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 279 transitions. [2022-03-20 18:16:51,906 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 279 transitions. Word has length 143 [2022-03-20 18:16:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:51,906 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 279 transitions. [2022-03-20 18:16:51,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 279 transitions. [2022-03-20 18:16:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:51,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:51,924 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:51,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 18:16:51,925 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:51,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1746101127, now seen corresponding path program 1 times [2022-03-20 18:16:51,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:51,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [705347818] [2022-03-20 18:16:51,925 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1746101127, now seen corresponding path program 2 times [2022-03-20 18:16:51,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:51,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403130854] [2022-03-20 18:16:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:51,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:52,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:52,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:52,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403130854] [2022-03-20 18:16:52,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403130854] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:52,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:52,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:16:52,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:52,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [705347818] [2022-03-20 18:16:52,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [705347818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:52,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:52,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:16:52,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056081331] [2022-03-20 18:16:52,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:52,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 18:16:52,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:52,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 18:16:52,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-03-20 18:16:52,396 INFO L87 Difference]: Start difference. First operand 233 states and 279 transitions. Second operand has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 28 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:53,709 INFO L93 Difference]: Finished difference Result 318 states and 364 transitions. [2022-03-20 18:16:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:16:53,709 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 28 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:53,712 INFO L225 Difference]: With dead ends: 318 [2022-03-20 18:16:53,712 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 18:16:53,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 18:16:53,714 INFO L913 BasicCegarLoop]: 135 mSDtfsCounter, 199 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:53,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 187 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:16:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 18:16:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-20 18:16:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 223 states have (on average 1.1973094170403586) internal successors, (267), 223 states have internal predecessors, (267), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2022-03-20 18:16:53,724 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 143 [2022-03-20 18:16:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:53,724 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2022-03-20 18:16:53,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.827586206896552) internal successors, (140), 28 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2022-03-20 18:16:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:53,726 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:53,726 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:53,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 18:16:53,726 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:53,727 INFO L85 PathProgramCache]: Analyzing trace with hash 297304713, now seen corresponding path program 1 times [2022-03-20 18:16:53,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:53,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1584881637] [2022-03-20 18:16:53,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash 297304713, now seen corresponding path program 2 times [2022-03-20 18:16:53,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:53,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192651102] [2022-03-20 18:16:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:53,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:54,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:54,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:54,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192651102] [2022-03-20 18:16:54,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192651102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:54,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:54,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:16:54,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1584881637] [2022-03-20 18:16:54,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1584881637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:54,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:54,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:16:54,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388024152] [2022-03-20 18:16:54,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:54,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 18:16:54,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:54,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 18:16:54,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:16:54,106 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 30 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:54,892 INFO L93 Difference]: Finished difference Result 308 states and 351 transitions. [2022-03-20 18:16:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:16:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 30 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:54,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:54,894 INFO L225 Difference]: With dead ends: 308 [2022-03-20 18:16:54,894 INFO L226 Difference]: Without dead ends: 223 [2022-03-20 18:16:54,897 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 18:16:54,898 INFO L913 BasicCegarLoop]: 129 mSDtfsCounter, 263 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:54,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 141 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-20 18:16:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-03-20 18:16:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 219 states have (on average 1.1917808219178083) internal successors, (261), 219 states have internal predecessors, (261), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2022-03-20 18:16:54,909 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 143 [2022-03-20 18:16:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:54,909 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2022-03-20 18:16:54,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.516129032258065) internal successors, (140), 30 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2022-03-20 18:16:54,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:54,911 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:54,911 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:54,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 18:16:54,911 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2017851138, now seen corresponding path program 1 times [2022-03-20 18:16:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:54,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [623841967] [2022-03-20 18:16:54,913 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:54,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2017851138, now seen corresponding path program 2 times [2022-03-20 18:16:54,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:54,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494780922] [2022-03-20 18:16:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:54,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:55,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:55,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:55,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494780922] [2022-03-20 18:16:55,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494780922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:55,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:55,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:16:55,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:55,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [623841967] [2022-03-20 18:16:55,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [623841967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:55,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:55,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:16:55,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53119484] [2022-03-20 18:16:55,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:55,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:16:55,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:55,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:16:55,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:16:55,330 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand has 32 states, 32 states have (on average 4.375) internal successors, (140), 31 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:56,171 INFO L93 Difference]: Finished difference Result 302 states and 343 transitions. [2022-03-20 18:16:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 18:16:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.375) internal successors, (140), 31 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:56,173 INFO L225 Difference]: With dead ends: 302 [2022-03-20 18:16:56,173 INFO L226 Difference]: Without dead ends: 221 [2022-03-20 18:16:56,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 18:16:56,175 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 271 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:56,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 143 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:56,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-20 18:16:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-03-20 18:16:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.1889400921658986) internal successors, (258), 217 states have internal predecessors, (258), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2022-03-20 18:16:56,189 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 143 [2022-03-20 18:16:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:56,189 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2022-03-20 18:16:56,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.375) internal successors, (140), 31 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2022-03-20 18:16:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:56,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:56,191 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:56,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 18:16:56,191 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1981140879, now seen corresponding path program 1 times [2022-03-20 18:16:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:56,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [504886771] [2022-03-20 18:16:56,192 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1981140879, now seen corresponding path program 2 times [2022-03-20 18:16:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:56,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350871416] [2022-03-20 18:16:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:56,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:56,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:56,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350871416] [2022-03-20 18:16:56,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350871416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:56,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:56,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:16:56,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:56,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [504886771] [2022-03-20 18:16:56,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [504886771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:56,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:56,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:16:56,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145438817] [2022-03-20 18:16:56,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:56,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 18:16:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 18:16:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:16:56,538 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 32 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:57,393 INFO L93 Difference]: Finished difference Result 298 states and 338 transitions. [2022-03-20 18:16:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 18:16:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 32 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:57,395 INFO L225 Difference]: With dead ends: 298 [2022-03-20 18:16:57,395 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 18:16:57,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 18:16:57,397 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 248 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:57,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 140 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 18:16:57,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-03-20 18:16:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 215 states have (on average 1.186046511627907) internal successors, (255), 215 states have internal predecessors, (255), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 258 transitions. [2022-03-20 18:16:57,409 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 258 transitions. Word has length 143 [2022-03-20 18:16:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:57,409 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 258 transitions. [2022-03-20 18:16:57,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 32 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 258 transitions. [2022-03-20 18:16:57,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:57,410 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:57,411 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:57,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 18:16:57,411 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:57,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:57,411 INFO L85 PathProgramCache]: Analyzing trace with hash -553761847, now seen corresponding path program 1 times [2022-03-20 18:16:57,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:57,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960056562] [2022-03-20 18:16:57,412 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:57,412 INFO L85 PathProgramCache]: Analyzing trace with hash -553761847, now seen corresponding path program 2 times [2022-03-20 18:16:57,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:57,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597011580] [2022-03-20 18:16:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:57,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:57,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:57,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:57,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597011580] [2022-03-20 18:16:57,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597011580] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:57,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:57,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:16:57,947 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:57,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960056562] [2022-03-20 18:16:57,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960056562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:57,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:57,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:16:57,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233430790] [2022-03-20 18:16:57,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:57,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 18:16:57,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 18:16:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:16:57,949 INFO L87 Difference]: Start difference. First operand 219 states and 258 transitions. Second operand has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:16:59,012 INFO L93 Difference]: Finished difference Result 288 states and 327 transitions. [2022-03-20 18:16:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 18:16:59,013 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:16:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:16:59,014 INFO L225 Difference]: With dead ends: 288 [2022-03-20 18:16:59,014 INFO L226 Difference]: Without dead ends: 211 [2022-03-20 18:16:59,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 18:16:59,017 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 229 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:16:59,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 133 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:16:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-20 18:16:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-03-20 18:16:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 207 states have (on average 1.173913043478261) internal successors, (243), 207 states have internal predecessors, (243), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 246 transitions. [2022-03-20 18:16:59,026 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 246 transitions. Word has length 143 [2022-03-20 18:16:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:16:59,027 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 246 transitions. [2022-03-20 18:16:59,027 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:16:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 246 transitions. [2022-03-20 18:16:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:16:59,028 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:16:59,028 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:16:59,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 18:16:59,029 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:16:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:16:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1427802886, now seen corresponding path program 1 times [2022-03-20 18:16:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:59,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2072252302] [2022-03-20 18:16:59,029 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:16:59,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1427802886, now seen corresponding path program 2 times [2022-03-20 18:16:59,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:16:59,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813103145] [2022-03-20 18:16:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:16:59,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:16:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:59,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:16:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:16:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:16:59,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:16:59,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813103145] [2022-03-20 18:16:59,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813103145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:59,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:59,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:16:59,578 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:16:59,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2072252302] [2022-03-20 18:16:59,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2072252302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:16:59,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:16:59,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:16:59,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759846265] [2022-03-20 18:16:59,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:16:59,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:16:59,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:16:59,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:16:59,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:16:59,580 INFO L87 Difference]: Start difference. First operand 211 states and 246 transitions. Second operand has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 37 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:00,776 INFO L93 Difference]: Finished difference Result 278 states and 313 transitions. [2022-03-20 18:17:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 18:17:00,776 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 37 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:17:00,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:00,778 INFO L225 Difference]: With dead ends: 278 [2022-03-20 18:17:00,778 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 18:17:00,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 18:17:00,781 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 227 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:00,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 145 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:17:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 18:17:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-20 18:17:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 205 states have (on average 1.170731707317073) internal successors, (240), 205 states have internal predecessors, (240), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 243 transitions. [2022-03-20 18:17:00,815 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 243 transitions. Word has length 143 [2022-03-20 18:17:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:00,815 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 243 transitions. [2022-03-20 18:17:00,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6842105263157894) internal successors, (140), 37 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 243 transitions. [2022-03-20 18:17:00,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:17:00,816 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:00,816 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:00,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 18:17:00,817 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:00,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1201706654, now seen corresponding path program 1 times [2022-03-20 18:17:00,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:00,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323120793] [2022-03-20 18:17:00,817 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:00,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1201706654, now seen corresponding path program 2 times [2022-03-20 18:17:00,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:00,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452050146] [2022-03-20 18:17:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:00,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:01,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:01,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452050146] [2022-03-20 18:17:01,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452050146] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:01,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:01,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:17:01,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:01,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323120793] [2022-03-20 18:17:01,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323120793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:01,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:01,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:17:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95459580] [2022-03-20 18:17:01,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:01,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:17:01,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:17:01,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:17:01,413 INFO L87 Difference]: Start difference. First operand 209 states and 243 transitions. Second operand has 40 states, 40 states have (on average 3.5) internal successors, (140), 39 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:02,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:02,613 INFO L93 Difference]: Finished difference Result 272 states and 306 transitions. [2022-03-20 18:17:02,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:17:02,613 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.5) internal successors, (140), 39 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:17:02,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:02,614 INFO L225 Difference]: With dead ends: 272 [2022-03-20 18:17:02,614 INFO L226 Difference]: Without dead ends: 205 [2022-03-20 18:17:02,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 18:17:02,617 INFO L913 BasicCegarLoop]: 102 mSDtfsCounter, 236 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:02,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 134 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:17:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-20 18:17:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-03-20 18:17:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 201 states have (on average 1.164179104477612) internal successors, (234), 201 states have internal predecessors, (234), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 237 transitions. [2022-03-20 18:17:02,625 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 237 transitions. Word has length 143 [2022-03-20 18:17:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:02,625 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 237 transitions. [2022-03-20 18:17:02,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.5) internal successors, (140), 39 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 237 transitions. [2022-03-20 18:17:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:17:02,626 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:02,627 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:02,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 18:17:02,627 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:02,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1310645142, now seen corresponding path program 1 times [2022-03-20 18:17:02,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:02,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [11128117] [2022-03-20 18:17:02,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:02,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1310645142, now seen corresponding path program 2 times [2022-03-20 18:17:02,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:02,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962172328] [2022-03-20 18:17:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:02,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:03,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:03,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:03,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962172328] [2022-03-20 18:17:03,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962172328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:03,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:03,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 18:17:03,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:03,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [11128117] [2022-03-20 18:17:03,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [11128117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:03,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:03,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 18:17:03,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394844394] [2022-03-20 18:17:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:03,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 18:17:03,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 18:17:03,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:17:03,286 INFO L87 Difference]: Start difference. First operand 205 states and 237 transitions. Second operand has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 41 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:04,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:04,564 INFO L93 Difference]: Finished difference Result 264 states and 296 transitions. [2022-03-20 18:17:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 18:17:04,565 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 41 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:17:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:04,566 INFO L225 Difference]: With dead ends: 264 [2022-03-20 18:17:04,566 INFO L226 Difference]: Without dead ends: 201 [2022-03-20 18:17:04,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 18:17:04,568 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 232 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:04,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 123 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:17:04,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-20 18:17:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-03-20 18:17:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.1573604060913705) internal successors, (228), 197 states have internal predecessors, (228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 231 transitions. [2022-03-20 18:17:04,577 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 231 transitions. Word has length 143 [2022-03-20 18:17:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:04,577 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 231 transitions. [2022-03-20 18:17:04,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 41 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 231 transitions. [2022-03-20 18:17:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:17:04,578 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:04,578 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:04,578 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 18:17:04,578 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:04,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:04,579 INFO L85 PathProgramCache]: Analyzing trace with hash -573249383, now seen corresponding path program 1 times [2022-03-20 18:17:04,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:04,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [792597307] [2022-03-20 18:17:04,579 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:04,579 INFO L85 PathProgramCache]: Analyzing trace with hash -573249383, now seen corresponding path program 2 times [2022-03-20 18:17:04,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:04,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053592365] [2022-03-20 18:17:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:04,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:05,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:05,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053592365] [2022-03-20 18:17:05,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053592365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:05,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:05,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:17:05,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:05,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [792597307] [2022-03-20 18:17:05,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [792597307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:05,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:05,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:17:05,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419840713] [2022-03-20 18:17:05,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:05,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 18:17:05,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:05,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 18:17:05,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:17:05,179 INFO L87 Difference]: Start difference. First operand 201 states and 231 transitions. Second operand has 45 states, 45 states have (on average 3.111111111111111) internal successors, (140), 44 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:06,290 INFO L93 Difference]: Finished difference Result 254 states and 284 transitions. [2022-03-20 18:17:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 18:17:06,291 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.111111111111111) internal successors, (140), 44 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:17:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:06,292 INFO L225 Difference]: With dead ends: 254 [2022-03-20 18:17:06,292 INFO L226 Difference]: Without dead ends: 195 [2022-03-20 18:17:06,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:17:06,294 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 282 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:06,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 104 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:17:06,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-20 18:17:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-03-20 18:17:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 191 states have (on average 1.1465968586387434) internal successors, (219), 191 states have internal predecessors, (219), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 222 transitions. [2022-03-20 18:17:06,303 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 222 transitions. Word has length 143 [2022-03-20 18:17:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:06,303 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 222 transitions. [2022-03-20 18:17:06,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.111111111111111) internal successors, (140), 44 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 222 transitions. [2022-03-20 18:17:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:17:06,304 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:06,304 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:06,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 18:17:06,305 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:06,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:06,305 INFO L85 PathProgramCache]: Analyzing trace with hash 214740329, now seen corresponding path program 1 times [2022-03-20 18:17:06,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:06,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [877642211] [2022-03-20 18:17:06,305 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 214740329, now seen corresponding path program 2 times [2022-03-20 18:17:06,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:06,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463510448] [2022-03-20 18:17:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:06,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:07,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:07,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:07,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463510448] [2022-03-20 18:17:07,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463510448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:07,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:07,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:17:07,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:07,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [877642211] [2022-03-20 18:17:07,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [877642211] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:07,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:07,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:17:07,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805497554] [2022-03-20 18:17:07,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:07,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 18:17:07,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:07,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 18:17:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 18:17:07,126 INFO L87 Difference]: Start difference. First operand 195 states and 222 transitions. Second operand has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:08,528 INFO L93 Difference]: Finished difference Result 244 states and 271 transitions. [2022-03-20 18:17:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 18:17:08,529 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:17:08,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:08,530 INFO L225 Difference]: With dead ends: 244 [2022-03-20 18:17:08,530 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 18:17:08,532 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 18:17:08,532 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 263 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:08,533 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 93 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:17:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 18:17:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-20 18:17:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 216 transitions. [2022-03-20 18:17:08,560 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 216 transitions. Word has length 143 [2022-03-20 18:17:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:08,560 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 216 transitions. [2022-03-20 18:17:08,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 216 transitions. [2022-03-20 18:17:08,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:17:08,562 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:08,562 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:08,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 18:17:08,562 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:08,563 INFO L85 PathProgramCache]: Analyzing trace with hash -20309694, now seen corresponding path program 1 times [2022-03-20 18:17:08,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:08,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [867874399] [2022-03-20 18:17:08,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash -20309694, now seen corresponding path program 2 times [2022-03-20 18:17:08,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:08,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229178871] [2022-03-20 18:17:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:08,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:09,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:09,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:09,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229178871] [2022-03-20 18:17:09,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229178871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:09,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:09,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 18:17:09,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:09,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [867874399] [2022-03-20 18:17:09,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [867874399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:09,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:09,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 18:17:09,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477920319] [2022-03-20 18:17:09,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:09,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 18:17:09,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:09,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 18:17:09,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:17:09,449 INFO L87 Difference]: Start difference. First operand 191 states and 216 transitions. Second operand has 48 states, 48 states have (on average 2.9166666666666665) internal successors, (140), 47 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:10,933 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2022-03-20 18:17:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 18:17:10,934 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9166666666666665) internal successors, (140), 47 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:17:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:10,935 INFO L225 Difference]: With dead ends: 238 [2022-03-20 18:17:10,935 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 18:17:10,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 18:17:10,937 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 281 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:10,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 100 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:17:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 18:17:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-20 18:17:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 185 states have (on average 1.135135135135135) internal successors, (210), 185 states have internal predecessors, (210), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 213 transitions. [2022-03-20 18:17:10,946 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 213 transitions. Word has length 143 [2022-03-20 18:17:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:10,947 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 213 transitions. [2022-03-20 18:17:10,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9166666666666665) internal successors, (140), 47 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 213 transitions. [2022-03-20 18:17:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:17:10,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:10,948 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:10,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 18:17:10,948 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:10,948 INFO L85 PathProgramCache]: Analyzing trace with hash 178059793, now seen corresponding path program 1 times [2022-03-20 18:17:10,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:10,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149294517] [2022-03-20 18:17:10,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash 178059793, now seen corresponding path program 2 times [2022-03-20 18:17:10,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:10,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596085983] [2022-03-20 18:17:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:10,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:11,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:11,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:11,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:11,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596085983] [2022-03-20 18:17:11,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596085983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:11,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:11,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 18:17:11,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:11,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149294517] [2022-03-20 18:17:11,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149294517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:11,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:11,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 18:17:11,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92528800] [2022-03-20 18:17:11,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:11,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 18:17:11,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:11,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 18:17:11,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:17:11,835 INFO L87 Difference]: Start difference. First operand 189 states and 213 transitions. Second operand has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:13,275 INFO L93 Difference]: Finished difference Result 234 states and 258 transitions. [2022-03-20 18:17:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 18:17:13,276 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:17:13,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:13,277 INFO L225 Difference]: With dead ends: 234 [2022-03-20 18:17:13,277 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 18:17:13,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 18:17:13,280 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 272 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:13,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 97 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:17:13,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 18:17:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-03-20 18:17:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 183 states have (on average 1.1311475409836065) internal successors, (207), 183 states have internal predecessors, (207), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2022-03-20 18:17:13,291 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 143 [2022-03-20 18:17:13,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:13,292 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2022-03-20 18:17:13,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.857142857142857) internal successors, (140), 48 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:13,292 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2022-03-20 18:17:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:17:13,293 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:13,293 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:13,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 18:17:13,293 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:13,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1601795351, now seen corresponding path program 1 times [2022-03-20 18:17:13,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:13,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [411011691] [2022-03-20 18:17:13,294 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:13,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1601795351, now seen corresponding path program 2 times [2022-03-20 18:17:13,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:13,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900447309] [2022-03-20 18:17:13,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:13,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:14,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:14,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:14,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900447309] [2022-03-20 18:17:14,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900447309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:14,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:14,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:17:14,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:14,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [411011691] [2022-03-20 18:17:14,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [411011691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:14,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:14,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:17:14,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133101977] [2022-03-20 18:17:14,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:14,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 18:17:14,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:14,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 18:17:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:17:14,290 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 52 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:16,030 INFO L93 Difference]: Finished difference Result 224 states and 247 transitions. [2022-03-20 18:17:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 18:17:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 52 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:17:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:16,032 INFO L225 Difference]: With dead ends: 224 [2022-03-20 18:17:16,032 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 18:17:16,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 18:17:16,034 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 284 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:16,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 90 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:17:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 18:17:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-03-20 18:17:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.1142857142857143) internal successors, (195), 175 states have internal predecessors, (195), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 198 transitions. [2022-03-20 18:17:16,049 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 198 transitions. Word has length 143 [2022-03-20 18:17:16,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:16,050 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 198 transitions. [2022-03-20 18:17:16,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.641509433962264) internal successors, (140), 52 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 198 transitions. [2022-03-20 18:17:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:17:16,050 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:16,051 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:16,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 18:17:16,051 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:16,051 INFO L85 PathProgramCache]: Analyzing trace with hash -964105850, now seen corresponding path program 1 times [2022-03-20 18:17:16,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:16,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1540226638] [2022-03-20 18:17:16,052 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash -964105850, now seen corresponding path program 2 times [2022-03-20 18:17:16,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:16,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378029302] [2022-03-20 18:17:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:16,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:17,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:17,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:17,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378029302] [2022-03-20 18:17:17,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378029302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:17,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:17,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 18:17:17,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:17,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1540226638] [2022-03-20 18:17:17,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1540226638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:17,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:17,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 18:17:17,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442595937] [2022-03-20 18:17:17,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:17,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 18:17:17,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:17,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 18:17:17,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 18:17:17,824 INFO L87 Difference]: Start difference. First operand 179 states and 198 transitions. Second operand has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:20,175 INFO L93 Difference]: Finished difference Result 456 states and 491 transitions. [2022-03-20 18:17:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 18:17:20,175 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:17:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:20,177 INFO L225 Difference]: With dead ends: 456 [2022-03-20 18:17:20,177 INFO L226 Difference]: Without dead ends: 453 [2022-03-20 18:17:20,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 18:17:20,180 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 513 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:20,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 36 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:17:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-20 18:17:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 452. [2022-03-20 18:17:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 448 states have (on average 1.0424107142857142) internal successors, (467), 448 states have internal predecessors, (467), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 470 transitions. [2022-03-20 18:17:20,215 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 470 transitions. Word has length 143 [2022-03-20 18:17:20,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:20,215 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 470 transitions. [2022-03-20 18:17:20,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 470 transitions. [2022-03-20 18:17:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 18:17:20,222 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:20,222 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:20,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 18:17:20,223 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1199688896, now seen corresponding path program 1 times [2022-03-20 18:17:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:20,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1814984104] [2022-03-20 18:17:20,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:20,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1199688896, now seen corresponding path program 2 times [2022-03-20 18:17:20,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:20,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206622348] [2022-03-20 18:17:20,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:20,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:22,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:22,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:22,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206622348] [2022-03-20 18:17:22,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206622348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:17:22,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97796597] [2022-03-20 18:17:22,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:17:22,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:22,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:17:22,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:17:22,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 18:17:22,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:17:22,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:17:22,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 18:17:22,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:17:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:22,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:17:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:24,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97796597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:17:24,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:17:24,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 104 [2022-03-20 18:17:24,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1814984104] [2022-03-20 18:17:24,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1814984104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:24,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:24,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 18:17:24,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418070748] [2022-03-20 18:17:24,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:24,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 18:17:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:24,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 18:17:24,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:17:24,510 INFO L87 Difference]: Start difference. First operand 452 states and 470 transitions. Second operand has 72 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 71 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:27,468 INFO L93 Difference]: Finished difference Result 458 states and 476 transitions. [2022-03-20 18:17:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 18:17:27,469 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 71 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-03-20 18:17:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:27,470 INFO L225 Difference]: With dead ends: 458 [2022-03-20 18:17:27,470 INFO L226 Difference]: Without dead ends: 455 [2022-03-20 18:17:27,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=12363, Invalid=17393, Unknown=0, NotChecked=0, Total=29756 [2022-03-20 18:17:27,472 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 553 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:27,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 26 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:17:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-03-20 18:17:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 454. [2022-03-20 18:17:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 450 states have (on average 1.0422222222222222) internal successors, (469), 450 states have internal predecessors, (469), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 472 transitions. [2022-03-20 18:17:27,488 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 472 transitions. Word has length 145 [2022-03-20 18:17:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:27,488 INFO L478 AbstractCegarLoop]: Abstraction has 454 states and 472 transitions. [2022-03-20 18:17:27,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 71 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 472 transitions. [2022-03-20 18:17:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 18:17:27,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:27,489 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:27,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 18:17:27,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 18:17:27,704 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:27,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1842268538, now seen corresponding path program 3 times [2022-03-20 18:17:27,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:27,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [58728892] [2022-03-20 18:17:27,705 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1842268538, now seen corresponding path program 4 times [2022-03-20 18:17:27,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:27,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983435809] [2022-03-20 18:17:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:27,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:29,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:29,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:29,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983435809] [2022-03-20 18:17:29,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983435809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:17:29,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642544225] [2022-03-20 18:17:29,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:17:29,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:29,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:17:29,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:17:29,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 18:17:29,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:17:29,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:17:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 18:17:29,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:17:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:29,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:17:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:31,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642544225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:17:31,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:17:31,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 104 [2022-03-20 18:17:31,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:31,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [58728892] [2022-03-20 18:17:31,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [58728892] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:31,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:31,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 18:17:31,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298292918] [2022-03-20 18:17:31,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:31,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 18:17:31,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 18:17:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:17:31,557 INFO L87 Difference]: Start difference. First operand 454 states and 472 transitions. Second operand has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:34,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:34,165 INFO L93 Difference]: Finished difference Result 460 states and 478 transitions. [2022-03-20 18:17:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 18:17:34,165 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-03-20 18:17:34,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:34,167 INFO L225 Difference]: With dead ends: 460 [2022-03-20 18:17:34,167 INFO L226 Difference]: Without dead ends: 457 [2022-03-20 18:17:34,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12466, Invalid=17636, Unknown=0, NotChecked=0, Total=30102 [2022-03-20 18:17:34,168 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 511 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:34,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 36 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:17:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-03-20 18:17:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 456. [2022-03-20 18:17:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 452 states have (on average 1.0420353982300885) internal successors, (471), 452 states have internal predecessors, (471), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 474 transitions. [2022-03-20 18:17:34,182 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 474 transitions. Word has length 147 [2022-03-20 18:17:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:34,183 INFO L478 AbstractCegarLoop]: Abstraction has 456 states and 474 transitions. [2022-03-20 18:17:34,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 72 states have internal predecessors, (144), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 474 transitions. [2022-03-20 18:17:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 18:17:34,184 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:34,184 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:34,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 18:17:34,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 18:17:34,399 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:34,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash 886013876, now seen corresponding path program 5 times [2022-03-20 18:17:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:34,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [229208492] [2022-03-20 18:17:34,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash 886013876, now seen corresponding path program 6 times [2022-03-20 18:17:34,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:34,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685274782] [2022-03-20 18:17:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:34,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:35,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:35,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685274782] [2022-03-20 18:17:35,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685274782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:17:35,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660391715] [2022-03-20 18:17:35,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:17:35,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:35,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:17:35,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:17:35,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 18:17:35,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 18:17:35,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:17:35,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 18:17:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:17:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:35,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:17:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:37,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660391715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:17:37,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:17:37,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 104 [2022-03-20 18:17:37,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:37,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [229208492] [2022-03-20 18:17:37,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [229208492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:37,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:37,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 18:17:37,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513447986] [2022-03-20 18:17:37,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:37,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 18:17:37,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 18:17:37,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:17:37,088 INFO L87 Difference]: Start difference. First operand 456 states and 474 transitions. Second operand has 74 states, 74 states have (on average 1.972972972972973) internal successors, (146), 73 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:39,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:39,078 INFO L93 Difference]: Finished difference Result 462 states and 480 transitions. [2022-03-20 18:17:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 18:17:39,079 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.972972972972973) internal successors, (146), 73 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-20 18:17:39,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:39,080 INFO L225 Difference]: With dead ends: 462 [2022-03-20 18:17:39,080 INFO L226 Difference]: Without dead ends: 459 [2022-03-20 18:17:39,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12569, Invalid=17881, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 18:17:39,085 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 535 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:39,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 46 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:17:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-03-20 18:17:39,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 458. [2022-03-20 18:17:39,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 454 states have (on average 1.0418502202643172) internal successors, (473), 454 states have internal predecessors, (473), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 476 transitions. [2022-03-20 18:17:39,102 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 476 transitions. Word has length 149 [2022-03-20 18:17:39,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:39,103 INFO L478 AbstractCegarLoop]: Abstraction has 458 states and 476 transitions. [2022-03-20 18:17:39,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.972972972972973) internal successors, (146), 73 states have internal predecessors, (146), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:39,103 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 476 transitions. [2022-03-20 18:17:39,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 18:17:39,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:39,104 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:39,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 18:17:39,338 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:39,338 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:39,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1048285038, now seen corresponding path program 7 times [2022-03-20 18:17:39,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:39,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [526419902] [2022-03-20 18:17:39,339 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1048285038, now seen corresponding path program 8 times [2022-03-20 18:17:39,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:39,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939961940] [2022-03-20 18:17:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:39,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:40,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:40,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:40,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939961940] [2022-03-20 18:17:40,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939961940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:17:40,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13623699] [2022-03-20 18:17:40,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:17:40,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:40,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:17:40,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:17:40,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 18:17:40,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:17:40,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:17:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 18:17:40,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:17:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:40,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:17:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:41,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13623699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:17:41,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:17:41,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 104 [2022-03-20 18:17:41,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:41,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [526419902] [2022-03-20 18:17:41,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [526419902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:41,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:41,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 18:17:41,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816129109] [2022-03-20 18:17:41,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:41,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 18:17:41,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:41,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 18:17:41,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:17:41,997 INFO L87 Difference]: Start difference. First operand 458 states and 476 transitions. Second operand has 75 states, 75 states have (on average 1.9733333333333334) internal successors, (148), 74 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:44,994 INFO L93 Difference]: Finished difference Result 464 states and 482 transitions. [2022-03-20 18:17:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 18:17:44,995 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9733333333333334) internal successors, (148), 74 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-03-20 18:17:44,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:44,996 INFO L225 Difference]: With dead ends: 464 [2022-03-20 18:17:44,996 INFO L226 Difference]: Without dead ends: 461 [2022-03-20 18:17:44,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2923 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12672, Invalid=18128, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 18:17:44,998 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 545 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:44,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 31 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:17:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-03-20 18:17:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 460. [2022-03-20 18:17:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 456 states have (on average 1.0416666666666667) internal successors, (475), 456 states have internal predecessors, (475), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 478 transitions. [2022-03-20 18:17:45,012 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 478 transitions. Word has length 151 [2022-03-20 18:17:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:45,013 INFO L478 AbstractCegarLoop]: Abstraction has 460 states and 478 transitions. [2022-03-20 18:17:45,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9733333333333334) internal successors, (148), 74 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 478 transitions. [2022-03-20 18:17:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 18:17:45,015 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:45,015 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:45,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 18:17:45,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:45,231 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:45,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1922918232, now seen corresponding path program 9 times [2022-03-20 18:17:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:45,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [90551183] [2022-03-20 18:17:45,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1922918232, now seen corresponding path program 10 times [2022-03-20 18:17:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:45,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47540132] [2022-03-20 18:17:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:46,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:46,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:46,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47540132] [2022-03-20 18:17:46,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47540132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:17:46,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498625046] [2022-03-20 18:17:46,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:17:46,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:46,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:17:46,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:17:46,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 18:17:46,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:17:46,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:17:46,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 18:17:46,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:17:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:47,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:17:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:48,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498625046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:17:48,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:17:48,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 104 [2022-03-20 18:17:48,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:48,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [90551183] [2022-03-20 18:17:48,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [90551183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:48,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:48,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 18:17:48,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682453280] [2022-03-20 18:17:48,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:48,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 18:17:48,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 18:17:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:17:48,681 INFO L87 Difference]: Start difference. First operand 460 states and 478 transitions. Second operand has 76 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 75 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:51,891 INFO L93 Difference]: Finished difference Result 466 states and 484 transitions. [2022-03-20 18:17:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 18:17:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 75 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-03-20 18:17:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:51,893 INFO L225 Difference]: With dead ends: 466 [2022-03-20 18:17:51,893 INFO L226 Difference]: Without dead ends: 463 [2022-03-20 18:17:51,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12775, Invalid=18377, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 18:17:51,895 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 535 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:51,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 31 Invalid, 2976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:17:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-20 18:17:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 462. [2022-03-20 18:17:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 458 states have (on average 1.0414847161572052) internal successors, (477), 458 states have internal predecessors, (477), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 480 transitions. [2022-03-20 18:17:51,951 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 480 transitions. Word has length 153 [2022-03-20 18:17:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:51,952 INFO L478 AbstractCegarLoop]: Abstraction has 462 states and 480 transitions. [2022-03-20 18:17:51,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9736842105263157) internal successors, (150), 75 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:51,952 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 480 transitions. [2022-03-20 18:17:51,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 18:17:51,953 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:51,953 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:51,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 18:17:52,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:52,154 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1096008862, now seen corresponding path program 11 times [2022-03-20 18:17:52,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:52,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [328909284] [2022-03-20 18:17:52,155 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1096008862, now seen corresponding path program 12 times [2022-03-20 18:17:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:52,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835039084] [2022-03-20 18:17:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:52,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:53,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:53,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:53,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835039084] [2022-03-20 18:17:53,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835039084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:17:53,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417025502] [2022-03-20 18:17:53,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:17:53,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:53,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:17:53,514 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:17:53,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 18:17:53,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 18:17:53,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:17:53,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 18:17:53,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:17:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:53,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:17:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:54,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417025502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:17:54,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:17:54,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 104 [2022-03-20 18:17:54,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:54,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [328909284] [2022-03-20 18:17:54,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [328909284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:54,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:54,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 18:17:54,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831184748] [2022-03-20 18:17:54,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:54,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 18:17:54,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:54,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 18:17:54,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:17:54,773 INFO L87 Difference]: Start difference. First operand 462 states and 480 transitions. Second operand has 77 states, 77 states have (on average 1.974025974025974) internal successors, (152), 76 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:17:56,949 INFO L93 Difference]: Finished difference Result 468 states and 486 transitions. [2022-03-20 18:17:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 18:17:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.974025974025974) internal successors, (152), 76 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-20 18:17:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:17:56,950 INFO L225 Difference]: With dead ends: 468 [2022-03-20 18:17:56,950 INFO L226 Difference]: Without dead ends: 465 [2022-03-20 18:17:56,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3070 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=12878, Invalid=18628, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 18:17:56,954 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 511 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:17:56,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 46 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2286 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:17:56,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-20 18:17:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 464. [2022-03-20 18:17:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 460 states have (on average 1.041304347826087) internal successors, (479), 460 states have internal predecessors, (479), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 482 transitions. [2022-03-20 18:17:56,972 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 482 transitions. Word has length 155 [2022-03-20 18:17:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:17:56,972 INFO L478 AbstractCegarLoop]: Abstraction has 464 states and 482 transitions. [2022-03-20 18:17:56,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.974025974025974) internal successors, (152), 76 states have internal predecessors, (152), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:17:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 482 transitions. [2022-03-20 18:17:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 18:17:56,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:17:56,974 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:17:56,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 18:17:57,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:57,183 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:17:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:17:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1005054052, now seen corresponding path program 13 times [2022-03-20 18:17:57,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:57,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180964109] [2022-03-20 18:17:57,184 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:17:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1005054052, now seen corresponding path program 14 times [2022-03-20 18:17:57,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:17:57,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871773425] [2022-03-20 18:17:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:17:57,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:17:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:58,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:17:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:17:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:58,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:17:58,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871773425] [2022-03-20 18:17:58,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871773425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:17:58,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118298500] [2022-03-20 18:17:58,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:17:58,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:17:58,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:17:58,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:17:58,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 18:17:58,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:17:58,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:17:58,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 18:17:58,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:17:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:58,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:17:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:17:59,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118298500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:17:59,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:17:59,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 104 [2022-03-20 18:17:59,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:17:59,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180964109] [2022-03-20 18:17:59,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180964109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:17:59,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:17:59,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 18:17:59,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755621406] [2022-03-20 18:17:59,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:17:59,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 18:17:59,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:17:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 18:17:59,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:17:59,941 INFO L87 Difference]: Start difference. First operand 464 states and 482 transitions. Second operand has 78 states, 78 states have (on average 1.9743589743589745) internal successors, (154), 77 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:01,988 INFO L93 Difference]: Finished difference Result 470 states and 488 transitions. [2022-03-20 18:18:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 18:18:01,992 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9743589743589745) internal successors, (154), 77 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-03-20 18:18:01,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:01,994 INFO L225 Difference]: With dead ends: 470 [2022-03-20 18:18:01,994 INFO L226 Difference]: Without dead ends: 467 [2022-03-20 18:18:02,003 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=12981, Invalid=18881, Unknown=0, NotChecked=0, Total=31862 [2022-03-20 18:18:02,003 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 510 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:02,003 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 51 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:18:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-03-20 18:18:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 466. [2022-03-20 18:18:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 462 states have (on average 1.0411255411255411) internal successors, (481), 462 states have internal predecessors, (481), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 484 transitions. [2022-03-20 18:18:02,019 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 484 transitions. Word has length 157 [2022-03-20 18:18:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:02,019 INFO L478 AbstractCegarLoop]: Abstraction has 466 states and 484 transitions. [2022-03-20 18:18:02,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9743589743589745) internal successors, (154), 77 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 484 transitions. [2022-03-20 18:18:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 18:18:02,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:02,020 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:02,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 18:18:02,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:18:02,238 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:02,238 INFO L85 PathProgramCache]: Analyzing trace with hash 503172438, now seen corresponding path program 15 times [2022-03-20 18:18:02,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:02,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995578070] [2022-03-20 18:18:02,238 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:18:02,239 INFO L85 PathProgramCache]: Analyzing trace with hash 503172438, now seen corresponding path program 16 times [2022-03-20 18:18:02,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:02,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868950678] [2022-03-20 18:18:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:02,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:04,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:04,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868950678] [2022-03-20 18:18:04,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868950678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:18:04,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611913624] [2022-03-20 18:18:04,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:18:04,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:18:04,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:18:04,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:18:04,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 18:18:04,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:18:04,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:18:04,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 18:18:04,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:18:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:04,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:18:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:05,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611913624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:18:05,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:18:05,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 104 [2022-03-20 18:18:05,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:05,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995578070] [2022-03-20 18:18:05,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995578070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:05,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:05,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 18:18:05,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761500753] [2022-03-20 18:18:05,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:05,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 18:18:05,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:05,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 18:18:05,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:18:05,986 INFO L87 Difference]: Start difference. First operand 466 states and 484 transitions. Second operand has 79 states, 79 states have (on average 1.9746835443037976) internal successors, (156), 78 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:08,954 INFO L93 Difference]: Finished difference Result 472 states and 490 transitions. [2022-03-20 18:18:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 18:18:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9746835443037976) internal successors, (156), 78 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-03-20 18:18:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:08,956 INFO L225 Difference]: With dead ends: 472 [2022-03-20 18:18:08,956 INFO L226 Difference]: Without dead ends: 469 [2022-03-20 18:18:08,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13084, Invalid=19136, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 18:18:08,958 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 603 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:08,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 41 Invalid, 2104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:18:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-03-20 18:18:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 468. [2022-03-20 18:18:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 464 states have (on average 1.040948275862069) internal successors, (483), 464 states have internal predecessors, (483), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 486 transitions. [2022-03-20 18:18:08,979 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 486 transitions. Word has length 159 [2022-03-20 18:18:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:08,979 INFO L478 AbstractCegarLoop]: Abstraction has 468 states and 486 transitions. [2022-03-20 18:18:08,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9746835443037976) internal successors, (156), 78 states have internal predecessors, (156), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 486 transitions. [2022-03-20 18:18:08,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 18:18:08,980 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:08,980 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:08,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 18:18:09,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 18:18:09,182 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:09,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1790116720, now seen corresponding path program 17 times [2022-03-20 18:18:09,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:09,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [743645710] [2022-03-20 18:18:09,183 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:18:09,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1790116720, now seen corresponding path program 18 times [2022-03-20 18:18:09,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:09,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37332904] [2022-03-20 18:18:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:09,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:10,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:10,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37332904] [2022-03-20 18:18:10,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37332904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:18:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939322879] [2022-03-20 18:18:10,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:18:10,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:18:10,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:18:10,618 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:18:10,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 18:18:10,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 18:18:10,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:18:10,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-20 18:18:10,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:18:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:10,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:18:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:11,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939322879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:18:11,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:18:11,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 104 [2022-03-20 18:18:11,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:11,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [743645710] [2022-03-20 18:18:11,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [743645710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:11,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:11,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 18:18:11,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267622496] [2022-03-20 18:18:11,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:11,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 18:18:11,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:11,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 18:18:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:18:11,819 INFO L87 Difference]: Start difference. First operand 468 states and 486 transitions. Second operand has 80 states, 80 states have (on average 1.975) internal successors, (158), 79 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:15,024 INFO L93 Difference]: Finished difference Result 474 states and 492 transitions. [2022-03-20 18:18:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 18:18:15,024 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.975) internal successors, (158), 79 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-03-20 18:18:15,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:15,026 INFO L225 Difference]: With dead ends: 474 [2022-03-20 18:18:15,026 INFO L226 Difference]: Without dead ends: 471 [2022-03-20 18:18:15,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3298 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=13187, Invalid=19393, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 18:18:15,028 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 541 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:15,028 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 41 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:18:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-03-20 18:18:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 470. [2022-03-20 18:18:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 466 states have (on average 1.0407725321888412) internal successors, (485), 466 states have internal predecessors, (485), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 488 transitions. [2022-03-20 18:18:15,042 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 488 transitions. Word has length 161 [2022-03-20 18:18:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:15,042 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 488 transitions. [2022-03-20 18:18:15,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.975) internal successors, (158), 79 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 488 transitions. [2022-03-20 18:18:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 18:18:15,043 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:15,044 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:15,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 18:18:15,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 18:18:15,265 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:15,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1972192586, now seen corresponding path program 19 times [2022-03-20 18:18:15,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:15,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [32968676] [2022-03-20 18:18:15,265 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:18:15,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1972192586, now seen corresponding path program 20 times [2022-03-20 18:18:15,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:15,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476908920] [2022-03-20 18:18:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:15,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:17,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:17,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476908920] [2022-03-20 18:18:17,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476908920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:18:17,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452251768] [2022-03-20 18:18:17,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:18:17,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:18:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:18:17,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:18:17,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 18:18:17,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:18:17,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:18:17,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 18:18:17,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:18:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:17,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:18:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:19,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452251768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:18:19,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:18:19,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 104 [2022-03-20 18:18:19,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:19,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [32968676] [2022-03-20 18:18:19,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [32968676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:19,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:19,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 18:18:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698880618] [2022-03-20 18:18:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:19,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 18:18:19,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 18:18:19,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:18:19,045 INFO L87 Difference]: Start difference. First operand 470 states and 488 transitions. Second operand has 81 states, 81 states have (on average 1.9753086419753085) internal successors, (160), 80 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:22,220 INFO L93 Difference]: Finished difference Result 476 states and 494 transitions. [2022-03-20 18:18:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 18:18:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9753086419753085) internal successors, (160), 80 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-03-20 18:18:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:22,222 INFO L225 Difference]: With dead ends: 476 [2022-03-20 18:18:22,222 INFO L226 Difference]: Without dead ends: 473 [2022-03-20 18:18:22,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13290, Invalid=19652, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 18:18:22,225 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 507 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:22,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 56 Invalid, 2834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:18:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-03-20 18:18:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 472. [2022-03-20 18:18:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 468 states have (on average 1.0405982905982907) internal successors, (487), 468 states have internal predecessors, (487), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 490 transitions. [2022-03-20 18:18:22,268 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 490 transitions. Word has length 163 [2022-03-20 18:18:22,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:22,269 INFO L478 AbstractCegarLoop]: Abstraction has 472 states and 490 transitions. [2022-03-20 18:18:22,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9753086419753085) internal successors, (160), 80 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 490 transitions. [2022-03-20 18:18:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 18:18:22,270 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:22,270 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:22,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-20 18:18:22,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 18:18:22,498 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:22,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:22,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1188972420, now seen corresponding path program 21 times [2022-03-20 18:18:22,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:22,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2053180739] [2022-03-20 18:18:22,499 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:18:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1188972420, now seen corresponding path program 22 times [2022-03-20 18:18:22,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:22,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273284141] [2022-03-20 18:18:22,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:22,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:24,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:24,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273284141] [2022-03-20 18:18:24,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273284141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:18:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955725619] [2022-03-20 18:18:24,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:18:24,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:18:24,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:18:24,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:18:24,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 18:18:24,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:18:24,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:18:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 18:18:24,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:18:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:24,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:18:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:26,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955725619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:18:26,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:18:26,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 104 [2022-03-20 18:18:26,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:26,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2053180739] [2022-03-20 18:18:26,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2053180739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:26,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:26,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 18:18:26,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504615381] [2022-03-20 18:18:26,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:26,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 18:18:26,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:26,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 18:18:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:18:26,283 INFO L87 Difference]: Start difference. First operand 472 states and 490 transitions. Second operand has 82 states, 82 states have (on average 1.975609756097561) internal successors, (162), 81 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:29,884 INFO L93 Difference]: Finished difference Result 478 states and 496 transitions. [2022-03-20 18:18:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 18:18:29,884 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.975609756097561) internal successors, (162), 81 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-03-20 18:18:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:29,885 INFO L225 Difference]: With dead ends: 478 [2022-03-20 18:18:29,885 INFO L226 Difference]: Without dead ends: 475 [2022-03-20 18:18:29,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3455 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13393, Invalid=19913, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 18:18:29,887 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 532 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:29,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 46 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:18:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-03-20 18:18:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 474. [2022-03-20 18:18:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 470 states have (on average 1.0404255319148936) internal successors, (489), 470 states have internal predecessors, (489), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 492 transitions. [2022-03-20 18:18:29,901 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 492 transitions. Word has length 165 [2022-03-20 18:18:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:29,901 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 492 transitions. [2022-03-20 18:18:29,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.975609756097561) internal successors, (162), 81 states have internal predecessors, (162), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:29,902 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 492 transitions. [2022-03-20 18:18:29,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 18:18:29,902 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:29,903 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:29,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 18:18:30,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 18:18:30,120 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:30,120 INFO L85 PathProgramCache]: Analyzing trace with hash 133669694, now seen corresponding path program 23 times [2022-03-20 18:18:30,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:30,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [496007887] [2022-03-20 18:18:30,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:18:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash 133669694, now seen corresponding path program 24 times [2022-03-20 18:18:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:30,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510333675] [2022-03-20 18:18:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:30,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:31,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:31,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:31,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510333675] [2022-03-20 18:18:31,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510333675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:18:31,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819385443] [2022-03-20 18:18:31,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:18:31,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:18:31,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:18:31,581 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:18:31,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 18:18:31,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 18:18:31,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:18:31,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 18:18:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:18:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:31,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:18:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:33,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819385443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:18:33,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:18:33,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 104 [2022-03-20 18:18:33,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:33,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [496007887] [2022-03-20 18:18:33,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [496007887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:33,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:33,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 18:18:33,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775006604] [2022-03-20 18:18:33,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:33,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 18:18:33,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:33,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 18:18:33,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:18:33,208 INFO L87 Difference]: Start difference. First operand 474 states and 492 transitions. Second operand has 83 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 82 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:37,075 INFO L93 Difference]: Finished difference Result 480 states and 498 transitions. [2022-03-20 18:18:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 18:18:37,075 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 82 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-03-20 18:18:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:37,077 INFO L225 Difference]: With dead ends: 480 [2022-03-20 18:18:37,077 INFO L226 Difference]: Without dead ends: 477 [2022-03-20 18:18:37,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 314 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3535 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13496, Invalid=20176, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 18:18:37,080 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 558 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2322 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 2322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:37,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 51 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 2322 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:18:37,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-20 18:18:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 476. [2022-03-20 18:18:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 472 states have (on average 1.0402542372881356) internal successors, (491), 472 states have internal predecessors, (491), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 494 transitions. [2022-03-20 18:18:37,101 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 494 transitions. Word has length 167 [2022-03-20 18:18:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:37,101 INFO L478 AbstractCegarLoop]: Abstraction has 476 states and 494 transitions. [2022-03-20 18:18:37,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 82 states have internal predecessors, (164), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:37,102 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 494 transitions. [2022-03-20 18:18:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 18:18:37,103 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:37,103 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:37,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 18:18:37,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 18:18:37,344 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:37,345 INFO L85 PathProgramCache]: Analyzing trace with hash -399968136, now seen corresponding path program 25 times [2022-03-20 18:18:37,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:37,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [97118282] [2022-03-20 18:18:37,345 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:18:37,345 INFO L85 PathProgramCache]: Analyzing trace with hash -399968136, now seen corresponding path program 26 times [2022-03-20 18:18:37,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:37,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074758895] [2022-03-20 18:18:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:37,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:39,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:39,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:39,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074758895] [2022-03-20 18:18:39,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074758895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:18:39,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445027336] [2022-03-20 18:18:39,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:18:39,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:18:39,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:18:39,339 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:18:39,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 18:18:39,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:18:39,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:18:39,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 18:18:39,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:18:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:39,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:18:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:41,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445027336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:18:41,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:18:41,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 104 [2022-03-20 18:18:41,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:41,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [97118282] [2022-03-20 18:18:41,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [97118282] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:41,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:41,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 18:18:41,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074768448] [2022-03-20 18:18:41,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:41,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 18:18:41,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:41,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 18:18:41,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:18:41,131 INFO L87 Difference]: Start difference. First operand 476 states and 494 transitions. Second operand has 84 states, 84 states have (on average 1.9761904761904763) internal successors, (166), 83 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:44,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:44,870 INFO L93 Difference]: Finished difference Result 482 states and 500 transitions. [2022-03-20 18:18:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 18:18:44,870 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9761904761904763) internal successors, (166), 83 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-03-20 18:18:44,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:44,871 INFO L225 Difference]: With dead ends: 482 [2022-03-20 18:18:44,871 INFO L226 Difference]: Without dead ends: 479 [2022-03-20 18:18:44,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13599, Invalid=20441, Unknown=0, NotChecked=0, Total=34040 [2022-03-20 18:18:44,873 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 571 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:44,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 41 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:18:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-03-20 18:18:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 478. [2022-03-20 18:18:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 474 states have (on average 1.040084388185654) internal successors, (493), 474 states have internal predecessors, (493), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 496 transitions. [2022-03-20 18:18:44,889 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 496 transitions. Word has length 169 [2022-03-20 18:18:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:44,889 INFO L478 AbstractCegarLoop]: Abstraction has 478 states and 496 transitions. [2022-03-20 18:18:44,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9761904761904763) internal successors, (166), 83 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 496 transitions. [2022-03-20 18:18:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 18:18:44,890 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:44,890 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:44,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 18:18:45,104 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 18:18:45,105 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:45,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2124814542, now seen corresponding path program 27 times [2022-03-20 18:18:45,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:45,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1575035856] [2022-03-20 18:18:45,106 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:18:45,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2124814542, now seen corresponding path program 28 times [2022-03-20 18:18:45,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:45,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490861144] [2022-03-20 18:18:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:45,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:47,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:47,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:47,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490861144] [2022-03-20 18:18:47,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490861144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:18:47,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108087761] [2022-03-20 18:18:47,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:18:47,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:18:47,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:18:47,256 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:18:47,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 18:18:47,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:18:47,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:18:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 18:18:47,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:18:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:47,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:18:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:48,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108087761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:18:48,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:18:48,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 104 [2022-03-20 18:18:48,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:48,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1575035856] [2022-03-20 18:18:48,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1575035856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:48,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:48,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 18:18:48,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658919781] [2022-03-20 18:18:48,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:48,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 18:18:48,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 18:18:48,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:18:48,778 INFO L87 Difference]: Start difference. First operand 478 states and 496 transitions. Second operand has 85 states, 85 states have (on average 1.9764705882352942) internal successors, (168), 84 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:18:52,366 INFO L93 Difference]: Finished difference Result 484 states and 502 transitions. [2022-03-20 18:18:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 18:18:52,366 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9764705882352942) internal successors, (168), 84 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-03-20 18:18:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:18:52,368 INFO L225 Difference]: With dead ends: 484 [2022-03-20 18:18:52,368 INFO L226 Difference]: Without dead ends: 481 [2022-03-20 18:18:52,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 324 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=13702, Invalid=20708, Unknown=0, NotChecked=0, Total=34410 [2022-03-20 18:18:52,369 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 560 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:18:52,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 51 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:18:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-20 18:18:52,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 480. [2022-03-20 18:18:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 476 states have (on average 1.0399159663865547) internal successors, (495), 476 states have internal predecessors, (495), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:52,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 498 transitions. [2022-03-20 18:18:52,384 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 498 transitions. Word has length 171 [2022-03-20 18:18:52,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:18:52,384 INFO L478 AbstractCegarLoop]: Abstraction has 480 states and 498 transitions. [2022-03-20 18:18:52,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.9764705882352942) internal successors, (168), 84 states have internal predecessors, (168), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:18:52,384 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 498 transitions. [2022-03-20 18:18:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 18:18:52,386 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:18:52,386 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:18:52,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 18:18:52,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:18:52,603 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:18:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:18:52,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1844834452, now seen corresponding path program 29 times [2022-03-20 18:18:52,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [606681599] [2022-03-20 18:18:52,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:18:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1844834452, now seen corresponding path program 30 times [2022-03-20 18:18:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:18:52,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159463705] [2022-03-20 18:18:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:18:52,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:18:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:54,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:18:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:18:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:54,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:18:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159463705] [2022-03-20 18:18:54,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159463705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:18:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464744699] [2022-03-20 18:18:54,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:18:54,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:18:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:18:54,625 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:18:54,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 18:18:54,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 18:18:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:18:54,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 18:18:54,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:18:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:55,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:18:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:18:56,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464744699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:18:56,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:18:56,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 104 [2022-03-20 18:18:56,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:18:56,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [606681599] [2022-03-20 18:18:56,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [606681599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:18:56,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:18:56,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 18:18:56,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979770638] [2022-03-20 18:18:56,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:18:56,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 18:18:56,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:18:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 18:18:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:18:56,622 INFO L87 Difference]: Start difference. First operand 480 states and 498 transitions. Second operand has 86 states, 86 states have (on average 1.9767441860465116) internal successors, (170), 85 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:00,910 INFO L93 Difference]: Finished difference Result 486 states and 504 transitions. [2022-03-20 18:19:00,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 18:19:00,911 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9767441860465116) internal successors, (170), 85 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-20 18:19:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:00,912 INFO L225 Difference]: With dead ends: 486 [2022-03-20 18:19:00,912 INFO L226 Difference]: Without dead ends: 483 [2022-03-20 18:19:00,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 329 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=13805, Invalid=20977, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 18:19:00,914 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 530 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:00,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 51 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:19:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-20 18:19:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 482. [2022-03-20 18:19:00,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 478 states have (on average 1.0397489539748954) internal successors, (497), 478 states have internal predecessors, (497), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 500 transitions. [2022-03-20 18:19:00,944 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 500 transitions. Word has length 173 [2022-03-20 18:19:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:00,944 INFO L478 AbstractCegarLoop]: Abstraction has 482 states and 500 transitions. [2022-03-20 18:19:00,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9767441860465116) internal successors, (170), 85 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 500 transitions. [2022-03-20 18:19:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 18:19:00,945 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:00,945 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:00,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 18:19:01,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:01,164 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:01,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash 928059686, now seen corresponding path program 31 times [2022-03-20 18:19:01,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:01,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1838810692] [2022-03-20 18:19:01,165 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:19:01,165 INFO L85 PathProgramCache]: Analyzing trace with hash 928059686, now seen corresponding path program 32 times [2022-03-20 18:19:01,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:01,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107340348] [2022-03-20 18:19:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:01,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:03,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:03,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107340348] [2022-03-20 18:19:03,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107340348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:19:03,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254246486] [2022-03-20 18:19:03,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:19:03,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:03,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:19:03,651 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:19:03,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 18:19:03,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:19:03,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:19:03,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 18:19:03,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:19:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:04,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:19:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:05,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254246486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:19:05,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:19:05,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 104 [2022-03-20 18:19:05,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:05,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1838810692] [2022-03-20 18:19:05,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1838810692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:05,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:05,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 18:19:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370828072] [2022-03-20 18:19:05,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:05,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 18:19:05,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:05,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 18:19:05,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:19:05,213 INFO L87 Difference]: Start difference. First operand 482 states and 500 transitions. Second operand has 87 states, 87 states have (on average 1.9770114942528736) internal successors, (172), 86 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:08,017 INFO L93 Difference]: Finished difference Result 488 states and 506 transitions. [2022-03-20 18:19:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 18:19:08,017 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9770114942528736) internal successors, (172), 86 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-03-20 18:19:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:08,018 INFO L225 Difference]: With dead ends: 488 [2022-03-20 18:19:08,018 INFO L226 Difference]: Without dead ends: 485 [2022-03-20 18:19:08,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3865 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13908, Invalid=21248, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 18:19:08,024 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 639 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 3010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 776 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:08,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 31 Invalid, 3010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [776 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:19:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-20 18:19:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 484. [2022-03-20 18:19:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 480 states have (on average 1.0395833333333333) internal successors, (499), 480 states have internal predecessors, (499), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 502 transitions. [2022-03-20 18:19:08,063 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 502 transitions. Word has length 175 [2022-03-20 18:19:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:08,063 INFO L478 AbstractCegarLoop]: Abstraction has 484 states and 502 transitions. [2022-03-20 18:19:08,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9770114942528736) internal successors, (172), 86 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 502 transitions. [2022-03-20 18:19:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 18:19:08,064 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:08,064 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:08,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 18:19:08,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:08,282 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1495364512, now seen corresponding path program 33 times [2022-03-20 18:19:08,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:08,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [876698980] [2022-03-20 18:19:08,283 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:19:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1495364512, now seen corresponding path program 34 times [2022-03-20 18:19:08,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:08,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131851285] [2022-03-20 18:19:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:08,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:10,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:10,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:10,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131851285] [2022-03-20 18:19:10,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131851285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:19:10,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153246757] [2022-03-20 18:19:10,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:19:10,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:10,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:19:10,428 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:19:10,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 18:19:10,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:19:10,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:19:10,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 18:19:10,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:19:10,810 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:10,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:19:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:11,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153246757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:19:11,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:19:11,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 104 [2022-03-20 18:19:11,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:11,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [876698980] [2022-03-20 18:19:11,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [876698980] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:11,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:11,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 18:19:11,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713204845] [2022-03-20 18:19:11,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:11,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 18:19:11,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:11,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 18:19:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:19:11,907 INFO L87 Difference]: Start difference. First operand 484 states and 502 transitions. Second operand has 88 states, 88 states have (on average 1.9772727272727273) internal successors, (174), 87 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:14,427 INFO L93 Difference]: Finished difference Result 490 states and 508 transitions. [2022-03-20 18:19:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 18:19:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9772727272727273) internal successors, (174), 87 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-03-20 18:19:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:14,429 INFO L225 Difference]: With dead ends: 490 [2022-03-20 18:19:14,429 INFO L226 Difference]: Without dead ends: 487 [2022-03-20 18:19:14,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=14011, Invalid=21521, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 18:19:14,432 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 513 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:14,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 41 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 1896 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:19:14,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-03-20 18:19:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 486. [2022-03-20 18:19:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 482 states have (on average 1.0394190871369295) internal successors, (501), 482 states have internal predecessors, (501), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 504 transitions. [2022-03-20 18:19:14,475 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 504 transitions. Word has length 177 [2022-03-20 18:19:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:14,475 INFO L478 AbstractCegarLoop]: Abstraction has 486 states and 504 transitions. [2022-03-20 18:19:14,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9772727272727273) internal successors, (174), 87 states have internal predecessors, (174), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 504 transitions. [2022-03-20 18:19:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 18:19:14,477 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:14,477 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:14,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 18:19:14,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:14,683 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:14,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1761222938, now seen corresponding path program 35 times [2022-03-20 18:19:14,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:14,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1970141026] [2022-03-20 18:19:14,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:19:14,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1761222938, now seen corresponding path program 36 times [2022-03-20 18:19:14,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:14,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691052269] [2022-03-20 18:19:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:14,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:16,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:16,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691052269] [2022-03-20 18:19:16,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691052269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:19:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459440664] [2022-03-20 18:19:16,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:19:16,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:16,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:19:16,814 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:19:16,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 18:19:16,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 18:19:16,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:19:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 18:19:16,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:19:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:17,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:19:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:18,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459440664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:19:18,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:19:18,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 104 [2022-03-20 18:19:18,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:18,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1970141026] [2022-03-20 18:19:18,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1970141026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:18,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:18,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 18:19:18,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205841382] [2022-03-20 18:19:18,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:18,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 18:19:18,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 18:19:18,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:19:18,034 INFO L87 Difference]: Start difference. First operand 486 states and 504 transitions. Second operand has 89 states, 89 states have (on average 1.9775280898876404) internal successors, (176), 88 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:21,279 INFO L93 Difference]: Finished difference Result 492 states and 510 transitions. [2022-03-20 18:19:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 18:19:21,279 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9775280898876404) internal successors, (176), 88 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-03-20 18:19:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:21,281 INFO L225 Difference]: With dead ends: 492 [2022-03-20 18:19:21,281 INFO L226 Difference]: Without dead ends: 489 [2022-03-20 18:19:21,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4036 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14114, Invalid=21796, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 18:19:21,286 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 573 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:21,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 31 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:19:21,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-03-20 18:19:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 488. [2022-03-20 18:19:21,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 484 states have (on average 1.0392561983471074) internal successors, (503), 484 states have internal predecessors, (503), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 506 transitions. [2022-03-20 18:19:21,309 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 506 transitions. Word has length 179 [2022-03-20 18:19:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:21,309 INFO L478 AbstractCegarLoop]: Abstraction has 488 states and 506 transitions. [2022-03-20 18:19:21,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9775280898876404) internal successors, (176), 88 states have internal predecessors, (176), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 506 transitions. [2022-03-20 18:19:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 18:19:21,311 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:21,311 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:21,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 18:19:21,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:21,528 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:21,528 INFO L85 PathProgramCache]: Analyzing trace with hash 310603604, now seen corresponding path program 37 times [2022-03-20 18:19:21,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:21,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [150782483] [2022-03-20 18:19:21,529 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:19:21,529 INFO L85 PathProgramCache]: Analyzing trace with hash 310603604, now seen corresponding path program 38 times [2022-03-20 18:19:21,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:21,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994484656] [2022-03-20 18:19:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:21,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:23,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:23,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994484656] [2022-03-20 18:19:23,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994484656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:19:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269971931] [2022-03-20 18:19:23,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:19:23,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:23,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:19:23,523 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:19:23,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 18:19:23,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:19:23,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:19:23,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 18:19:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:19:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:23,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:19:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:24,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269971931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:19:24,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:19:24,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 104 [2022-03-20 18:19:24,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:24,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [150782483] [2022-03-20 18:19:24,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [150782483] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:24,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:24,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 18:19:24,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091570489] [2022-03-20 18:19:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:24,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 18:19:24,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:24,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 18:19:24,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:19:24,998 INFO L87 Difference]: Start difference. First operand 488 states and 506 transitions. Second operand has 90 states, 90 states have (on average 1.9777777777777779) internal successors, (178), 89 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:28,219 INFO L93 Difference]: Finished difference Result 494 states and 512 transitions. [2022-03-20 18:19:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 18:19:28,219 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.9777777777777779) internal successors, (178), 89 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-03-20 18:19:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:28,221 INFO L225 Difference]: With dead ends: 494 [2022-03-20 18:19:28,221 INFO L226 Difference]: Without dead ends: 491 [2022-03-20 18:19:28,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4123 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=14217, Invalid=22073, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 18:19:28,223 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 578 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:28,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 46 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1873 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:19:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-03-20 18:19:28,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 490. [2022-03-20 18:19:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 486 states have (on average 1.0390946502057614) internal successors, (505), 486 states have internal predecessors, (505), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 508 transitions. [2022-03-20 18:19:28,268 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 508 transitions. Word has length 181 [2022-03-20 18:19:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:28,268 INFO L478 AbstractCegarLoop]: Abstraction has 490 states and 508 transitions. [2022-03-20 18:19:28,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.9777777777777779) internal successors, (178), 89 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:28,268 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 508 transitions. [2022-03-20 18:19:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 18:19:28,269 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:28,269 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:28,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 18:19:28,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:28,470 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2129794830, now seen corresponding path program 39 times [2022-03-20 18:19:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:28,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1757686403] [2022-03-20 18:19:28,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:19:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2129794830, now seen corresponding path program 40 times [2022-03-20 18:19:28,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:28,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824635348] [2022-03-20 18:19:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:28,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:29,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:29,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824635348] [2022-03-20 18:19:29,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824635348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:19:29,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100944341] [2022-03-20 18:19:29,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:19:29,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:29,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:19:29,919 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:19:29,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 18:19:29,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:19:29,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:19:29,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 18:19:29,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:19:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:30,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:19:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:30,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100944341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:19:30,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:19:30,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 104 [2022-03-20 18:19:30,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:30,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1757686403] [2022-03-20 18:19:30,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1757686403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:30,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:30,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 18:19:30,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333600377] [2022-03-20 18:19:30,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:30,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 18:19:30,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:30,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 18:19:30,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:19:30,881 INFO L87 Difference]: Start difference. First operand 490 states and 508 transitions. Second operand has 91 states, 91 states have (on average 1.978021978021978) internal successors, (180), 90 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:33,861 INFO L93 Difference]: Finished difference Result 496 states and 514 transitions. [2022-03-20 18:19:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 18:19:33,862 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.978021978021978) internal successors, (180), 90 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-03-20 18:19:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:33,863 INFO L225 Difference]: With dead ends: 496 [2022-03-20 18:19:33,863 INFO L226 Difference]: Without dead ends: 493 [2022-03-20 18:19:33,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=14320, Invalid=22352, Unknown=0, NotChecked=0, Total=36672 [2022-03-20 18:19:33,868 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 595 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:33,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 36 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:19:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-03-20 18:19:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 492. [2022-03-20 18:19:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 488 states have (on average 1.0389344262295082) internal successors, (507), 488 states have internal predecessors, (507), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 510 transitions. [2022-03-20 18:19:33,927 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 510 transitions. Word has length 183 [2022-03-20 18:19:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:33,927 INFO L478 AbstractCegarLoop]: Abstraction has 492 states and 510 transitions. [2022-03-20 18:19:33,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.978021978021978) internal successors, (180), 90 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 510 transitions. [2022-03-20 18:19:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 18:19:33,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:33,929 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:33,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 18:19:34,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-20 18:19:34,164 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1974093752, now seen corresponding path program 41 times [2022-03-20 18:19:34,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:34,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1298342494] [2022-03-20 18:19:34,165 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:19:34,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1974093752, now seen corresponding path program 42 times [2022-03-20 18:19:34,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:34,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781768874] [2022-03-20 18:19:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:34,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:36,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:36,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:36,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781768874] [2022-03-20 18:19:36,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781768874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:19:36,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389071861] [2022-03-20 18:19:36,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:19:36,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:36,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:19:36,450 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:19:36,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 18:19:36,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 18:19:36,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:19:36,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 18:19:36,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:19:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:36,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:19:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:37,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389071861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:19:37,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:19:37,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 104 [2022-03-20 18:19:37,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:37,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1298342494] [2022-03-20 18:19:37,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1298342494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:37,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:37,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 18:19:37,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131515869] [2022-03-20 18:19:37,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:37,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 18:19:37,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:37,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 18:19:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:19:37,575 INFO L87 Difference]: Start difference. First operand 492 states and 510 transitions. Second operand has 92 states, 92 states have (on average 1.9782608695652173) internal successors, (182), 91 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:41,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:41,747 INFO L93 Difference]: Finished difference Result 498 states and 516 transitions. [2022-03-20 18:19:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 18:19:41,749 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9782608695652173) internal successors, (182), 91 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-03-20 18:19:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:41,750 INFO L225 Difference]: With dead ends: 498 [2022-03-20 18:19:41,750 INFO L226 Difference]: Without dead ends: 495 [2022-03-20 18:19:41,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 359 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4300 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14423, Invalid=22633, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 18:19:41,752 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 593 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:41,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 51 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1725 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:19:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-20 18:19:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 494. [2022-03-20 18:19:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 490 states have (on average 1.0387755102040817) internal successors, (509), 490 states have internal predecessors, (509), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 512 transitions. [2022-03-20 18:19:41,769 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 512 transitions. Word has length 185 [2022-03-20 18:19:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:41,769 INFO L478 AbstractCegarLoop]: Abstraction has 494 states and 512 transitions. [2022-03-20 18:19:41,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9782608695652173) internal successors, (182), 91 states have internal predecessors, (182), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 512 transitions. [2022-03-20 18:19:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 18:19:41,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:41,771 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:41,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 18:19:41,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 18:19:41,975 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1263923970, now seen corresponding path program 43 times [2022-03-20 18:19:41,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:41,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [312200050] [2022-03-20 18:19:41,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:19:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1263923970, now seen corresponding path program 44 times [2022-03-20 18:19:41,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:41,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242174933] [2022-03-20 18:19:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:41,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:43,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:43,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242174933] [2022-03-20 18:19:43,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242174933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:19:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310242239] [2022-03-20 18:19:43,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:19:43,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:43,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:19:43,557 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:19:43,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 18:19:43,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:19:43,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:19:43,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 18:19:43,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:19:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:43,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:19:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:44,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310242239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:19:44,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:19:44,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 104 [2022-03-20 18:19:44,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:44,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [312200050] [2022-03-20 18:19:44,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [312200050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:44,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:44,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 18:19:44,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950358749] [2022-03-20 18:19:44,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:44,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 18:19:44,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 18:19:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:19:44,347 INFO L87 Difference]: Start difference. First operand 494 states and 512 transitions. Second operand has 93 states, 93 states have (on average 1.978494623655914) internal successors, (184), 92 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:47,703 INFO L93 Difference]: Finished difference Result 500 states and 518 transitions. [2022-03-20 18:19:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 18:19:47,704 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.978494623655914) internal successors, (184), 92 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-03-20 18:19:47,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:47,706 INFO L225 Difference]: With dead ends: 500 [2022-03-20 18:19:47,706 INFO L226 Difference]: Without dead ends: 497 [2022-03-20 18:19:47,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 364 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4390 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=14526, Invalid=22916, Unknown=0, NotChecked=0, Total=37442 [2022-03-20 18:19:47,709 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 656 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:47,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 36 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:19:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-03-20 18:19:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 496. [2022-03-20 18:19:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 492 states have (on average 1.0386178861788617) internal successors, (511), 492 states have internal predecessors, (511), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 514 transitions. [2022-03-20 18:19:47,735 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 514 transitions. Word has length 187 [2022-03-20 18:19:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:47,736 INFO L478 AbstractCegarLoop]: Abstraction has 496 states and 514 transitions. [2022-03-20 18:19:47,736 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.978494623655914) internal successors, (184), 92 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 514 transitions. [2022-03-20 18:19:47,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-20 18:19:47,737 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:47,759 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:47,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 18:19:47,985 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 18:19:47,987 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:47,987 INFO L85 PathProgramCache]: Analyzing trace with hash -852334788, now seen corresponding path program 45 times [2022-03-20 18:19:47,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:47,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [342056458] [2022-03-20 18:19:47,988 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:19:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash -852334788, now seen corresponding path program 46 times [2022-03-20 18:19:47,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:47,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236235231] [2022-03-20 18:19:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:47,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:50,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:50,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:50,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236235231] [2022-03-20 18:19:50,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236235231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:19:50,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657306603] [2022-03-20 18:19:50,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:19:50,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:50,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:19:50,798 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:19:50,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 18:19:50,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:19:50,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:19:50,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 18:19:50,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:19:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:51,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:19:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:51,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657306603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:19:51,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:19:51,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 104 [2022-03-20 18:19:51,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:51,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [342056458] [2022-03-20 18:19:51,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [342056458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:51,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:51,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 18:19:51,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291277871] [2022-03-20 18:19:51,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:51,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 18:19:51,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 18:19:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:19:51,863 INFO L87 Difference]: Start difference. First operand 496 states and 514 transitions. Second operand has 94 states, 94 states have (on average 1.9787234042553192) internal successors, (186), 93 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:19:55,230 INFO L93 Difference]: Finished difference Result 502 states and 520 transitions. [2022-03-20 18:19:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 18:19:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9787234042553192) internal successors, (186), 93 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-03-20 18:19:55,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:19:55,247 INFO L225 Difference]: With dead ends: 502 [2022-03-20 18:19:55,247 INFO L226 Difference]: Without dead ends: 499 [2022-03-20 18:19:55,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 369 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4481 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14629, Invalid=23201, Unknown=0, NotChecked=0, Total=37830 [2022-03-20 18:19:55,249 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 612 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:19:55,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 31 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 1937 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:19:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-20 18:19:55,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 498. [2022-03-20 18:19:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 494 states have (on average 1.0384615384615385) internal successors, (513), 494 states have internal predecessors, (513), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 516 transitions. [2022-03-20 18:19:55,280 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 516 transitions. Word has length 189 [2022-03-20 18:19:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:19:55,280 INFO L478 AbstractCegarLoop]: Abstraction has 498 states and 516 transitions. [2022-03-20 18:19:55,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9787234042553192) internal successors, (186), 93 states have internal predecessors, (186), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:19:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 516 transitions. [2022-03-20 18:19:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 18:19:55,281 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:19:55,281 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:19:55,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 18:19:55,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:55,482 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:19:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:19:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1237497078, now seen corresponding path program 47 times [2022-03-20 18:19:55,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:55,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354274281] [2022-03-20 18:19:55,483 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:19:55,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1237497078, now seen corresponding path program 48 times [2022-03-20 18:19:55,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:19:55,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557343989] [2022-03-20 18:19:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:19:55,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:19:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:57,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:19:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:19:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:57,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:19:57,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557343989] [2022-03-20 18:19:57,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557343989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:19:57,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077366343] [2022-03-20 18:19:57,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:19:57,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:19:57,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:19:57,582 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:19:57,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 18:19:57,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 18:19:57,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:19:57,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 18:19:57,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:19:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:57,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:19:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:19:58,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077366343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:19:58,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:19:58,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 104 [2022-03-20 18:19:58,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:19:58,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354274281] [2022-03-20 18:19:58,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354274281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:19:58,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:19:58,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 18:19:58,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267260123] [2022-03-20 18:19:58,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:19:58,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 18:19:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:19:58,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 18:19:58,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:19:58,419 INFO L87 Difference]: Start difference. First operand 498 states and 516 transitions. Second operand has 95 states, 95 states have (on average 1.9789473684210526) internal successors, (188), 94 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:02,231 INFO L93 Difference]: Finished difference Result 504 states and 522 transitions. [2022-03-20 18:20:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 18:20:02,231 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9789473684210526) internal successors, (188), 94 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-03-20 18:20:02,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:02,233 INFO L225 Difference]: With dead ends: 504 [2022-03-20 18:20:02,233 INFO L226 Difference]: Without dead ends: 501 [2022-03-20 18:20:02,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 374 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4573 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=14732, Invalid=23488, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 18:20:02,235 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 744 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:02,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 31 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [913 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:20:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-20 18:20:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 500. [2022-03-20 18:20:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 496 states have (on average 1.0383064516129032) internal successors, (515), 496 states have internal predecessors, (515), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 518 transitions. [2022-03-20 18:20:02,259 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 518 transitions. Word has length 191 [2022-03-20 18:20:02,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:02,260 INFO L478 AbstractCegarLoop]: Abstraction has 500 states and 518 transitions. [2022-03-20 18:20:02,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9789473684210526) internal successors, (188), 94 states have internal predecessors, (188), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 518 transitions. [2022-03-20 18:20:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 18:20:02,261 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:02,261 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:02,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 18:20:02,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:02,476 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:02,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:02,476 INFO L85 PathProgramCache]: Analyzing trace with hash -478774224, now seen corresponding path program 49 times [2022-03-20 18:20:02,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:02,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1716417021] [2022-03-20 18:20:02,477 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:20:02,477 INFO L85 PathProgramCache]: Analyzing trace with hash -478774224, now seen corresponding path program 50 times [2022-03-20 18:20:02,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:02,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218510340] [2022-03-20 18:20:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:02,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:05,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:05,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218510340] [2022-03-20 18:20:05,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218510340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:20:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974336563] [2022-03-20 18:20:05,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:20:05,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:05,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:20:05,069 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:20:05,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 18:20:05,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:20:05,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:20:05,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-20 18:20:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:20:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:05,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:20:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:06,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974336563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:20:06,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:20:06,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 104 [2022-03-20 18:20:06,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:06,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1716417021] [2022-03-20 18:20:06,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1716417021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:06,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:06,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 18:20:06,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390004855] [2022-03-20 18:20:06,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:06,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 18:20:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:06,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 18:20:06,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:20:06,139 INFO L87 Difference]: Start difference. First operand 500 states and 518 transitions. Second operand has 96 states, 96 states have (on average 1.9791666666666667) internal successors, (190), 95 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:09,057 INFO L93 Difference]: Finished difference Result 506 states and 524 transitions. [2022-03-20 18:20:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 18:20:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9791666666666667) internal successors, (190), 95 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-03-20 18:20:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:09,059 INFO L225 Difference]: With dead ends: 506 [2022-03-20 18:20:09,059 INFO L226 Difference]: Without dead ends: 503 [2022-03-20 18:20:09,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4666 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=14835, Invalid=23777, Unknown=0, NotChecked=0, Total=38612 [2022-03-20 18:20:09,062 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 622 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1975 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:09,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 51 Invalid, 2724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 1975 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:20:09,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-03-20 18:20:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 502. [2022-03-20 18:20:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 498 states have (on average 1.038152610441767) internal successors, (517), 498 states have internal predecessors, (517), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 520 transitions. [2022-03-20 18:20:09,080 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 520 transitions. Word has length 193 [2022-03-20 18:20:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:09,080 INFO L478 AbstractCegarLoop]: Abstraction has 502 states and 520 transitions. [2022-03-20 18:20:09,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9791666666666667) internal successors, (190), 95 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 520 transitions. [2022-03-20 18:20:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 18:20:09,081 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:09,081 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:09,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 18:20:09,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 18:20:09,296 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash -548053782, now seen corresponding path program 51 times [2022-03-20 18:20:09,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:09,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [486626118] [2022-03-20 18:20:09,297 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:20:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash -548053782, now seen corresponding path program 52 times [2022-03-20 18:20:09,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:09,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60332465] [2022-03-20 18:20:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:09,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:12,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:12,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:12,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60332465] [2022-03-20 18:20:12,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60332465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:20:12,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284471992] [2022-03-20 18:20:12,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:20:12,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:12,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:20:12,316 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:20:12,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 18:20:12,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:20:12,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:20:12,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 18:20:12,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:20:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:12,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:20:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:13,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284471992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:20:13,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:20:13,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 104 [2022-03-20 18:20:13,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:13,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [486626118] [2022-03-20 18:20:13,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [486626118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:13,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:13,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 18:20:13,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439500005] [2022-03-20 18:20:13,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:13,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 18:20:13,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:13,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 18:20:13,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:20:13,689 INFO L87 Difference]: Start difference. First operand 502 states and 520 transitions. Second operand has 97 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 96 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:19,143 INFO L93 Difference]: Finished difference Result 508 states and 526 transitions. [2022-03-20 18:20:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 18:20:19,144 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 96 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-03-20 18:20:19,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:19,145 INFO L225 Difference]: With dead ends: 508 [2022-03-20 18:20:19,145 INFO L226 Difference]: Without dead ends: 505 [2022-03-20 18:20:19,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 384 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=14938, Invalid=24068, Unknown=0, NotChecked=0, Total=39006 [2022-03-20 18:20:19,147 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 735 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:19,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 46 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 18:20:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-03-20 18:20:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 504. [2022-03-20 18:20:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.038) internal successors, (519), 500 states have internal predecessors, (519), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 522 transitions. [2022-03-20 18:20:19,166 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 522 transitions. Word has length 195 [2022-03-20 18:20:19,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:19,166 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 522 transitions. [2022-03-20 18:20:19,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9793814432989691) internal successors, (192), 96 states have internal predecessors, (192), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 522 transitions. [2022-03-20 18:20:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 18:20:19,167 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:19,167 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:19,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 18:20:19,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-20 18:20:19,380 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1593767716, now seen corresponding path program 53 times [2022-03-20 18:20:19,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:19,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [150780195] [2022-03-20 18:20:19,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:20:19,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1593767716, now seen corresponding path program 54 times [2022-03-20 18:20:19,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:19,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315240284] [2022-03-20 18:20:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:19,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:22,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:22,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:22,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315240284] [2022-03-20 18:20:22,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315240284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:20:22,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301407811] [2022-03-20 18:20:22,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:20:22,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:22,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:20:22,401 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:20:22,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 18:20:22,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-20 18:20:22,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:20:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 18:20:22,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:20:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:22,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:20:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:23,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301407811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:20:23,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:20:23,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 104 [2022-03-20 18:20:23,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:23,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [150780195] [2022-03-20 18:20:23,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [150780195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:23,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:23,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-20 18:20:23,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322814038] [2022-03-20 18:20:23,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:23,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 18:20:23,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:23,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 18:20:23,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:20:23,285 INFO L87 Difference]: Start difference. First operand 504 states and 522 transitions. Second operand has 98 states, 98 states have (on average 1.9795918367346939) internal successors, (194), 97 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:27,787 INFO L93 Difference]: Finished difference Result 510 states and 528 transitions. [2022-03-20 18:20:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 18:20:27,788 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.9795918367346939) internal successors, (194), 97 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-03-20 18:20:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:27,789 INFO L225 Difference]: With dead ends: 510 [2022-03-20 18:20:27,789 INFO L226 Difference]: Without dead ends: 507 [2022-03-20 18:20:27,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 389 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4855 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=15041, Invalid=24361, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 18:20:27,813 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 602 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1843 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 1843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:27,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 41 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 1843 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:20:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-20 18:20:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 506. [2022-03-20 18:20:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 502 states have (on average 1.0378486055776892) internal successors, (521), 502 states have internal predecessors, (521), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 524 transitions. [2022-03-20 18:20:27,831 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 524 transitions. Word has length 197 [2022-03-20 18:20:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:27,831 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 524 transitions. [2022-03-20 18:20:27,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.9795918367346939) internal successors, (194), 97 states have internal predecessors, (194), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 524 transitions. [2022-03-20 18:20:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 18:20:27,832 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:27,832 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:27,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 18:20:28,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:28,048 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:28,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1700074786, now seen corresponding path program 55 times [2022-03-20 18:20:28,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:28,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [729087818] [2022-03-20 18:20:28,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:20:28,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1700074786, now seen corresponding path program 56 times [2022-03-20 18:20:28,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:28,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015376927] [2022-03-20 18:20:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:28,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:30,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:30,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015376927] [2022-03-20 18:20:30,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015376927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:20:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115415479] [2022-03-20 18:20:30,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:20:30,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:30,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:20:30,681 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:20:30,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 18:20:30,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:20:30,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:20:30,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 18:20:30,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:20:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:31,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:20:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:31,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115415479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:20:31,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:20:31,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 104 [2022-03-20 18:20:31,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:31,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [729087818] [2022-03-20 18:20:31,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [729087818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:31,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:31,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 18:20:31,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626061838] [2022-03-20 18:20:31,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:31,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 18:20:31,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:31,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 18:20:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:20:31,528 INFO L87 Difference]: Start difference. First operand 506 states and 524 transitions. Second operand has 99 states, 99 states have (on average 1.97979797979798) internal successors, (196), 98 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:34,695 INFO L93 Difference]: Finished difference Result 512 states and 530 transitions. [2022-03-20 18:20:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 18:20:34,695 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.97979797979798) internal successors, (196), 98 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-03-20 18:20:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:34,697 INFO L225 Difference]: With dead ends: 512 [2022-03-20 18:20:34,697 INFO L226 Difference]: Without dead ends: 509 [2022-03-20 18:20:34,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15144, Invalid=24656, Unknown=0, NotChecked=0, Total=39800 [2022-03-20 18:20:34,699 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 631 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:34,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 41 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 2010 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:20:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-03-20 18:20:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 508. [2022-03-20 18:20:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 504 states have (on average 1.0376984126984128) internal successors, (523), 504 states have internal predecessors, (523), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 526 transitions. [2022-03-20 18:20:34,718 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 526 transitions. Word has length 199 [2022-03-20 18:20:34,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:34,718 INFO L478 AbstractCegarLoop]: Abstraction has 508 states and 526 transitions. [2022-03-20 18:20:34,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.97979797979798) internal successors, (196), 98 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 526 transitions. [2022-03-20 18:20:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-20 18:20:34,719 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:34,720 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:34,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 18:20:34,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:34,926 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:34,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1691822056, now seen corresponding path program 57 times [2022-03-20 18:20:34,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:34,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1235875196] [2022-03-20 18:20:34,927 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:20:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1691822056, now seen corresponding path program 58 times [2022-03-20 18:20:34,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:34,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734331273] [2022-03-20 18:20:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:34,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:37,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:37,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734331273] [2022-03-20 18:20:37,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734331273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:20:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887776766] [2022-03-20 18:20:37,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:20:37,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:37,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:20:37,023 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:20:37,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 18:20:37,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:20:37,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:20:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-20 18:20:37,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:20:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:37,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:20:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:37,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887776766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:20:37,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:20:37,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 104 [2022-03-20 18:20:37,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:37,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1235875196] [2022-03-20 18:20:37,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1235875196] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:37,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:37,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-20 18:20:37,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340867130] [2022-03-20 18:20:37,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:37,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 18:20:37,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:37,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 18:20:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:20:37,613 INFO L87 Difference]: Start difference. First operand 508 states and 526 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 99 states have internal predecessors, (198), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:41,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:41,712 INFO L93 Difference]: Finished difference Result 514 states and 532 transitions. [2022-03-20 18:20:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 18:20:41,712 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 99 states have internal predecessors, (198), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-03-20 18:20:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:41,714 INFO L225 Difference]: With dead ends: 514 [2022-03-20 18:20:41,714 INFO L226 Difference]: Without dead ends: 511 [2022-03-20 18:20:41,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 399 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=15247, Invalid=24953, Unknown=0, NotChecked=0, Total=40200 [2022-03-20 18:20:41,716 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 651 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 738 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:41,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 31 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [738 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:20:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-20 18:20:41,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 510. [2022-03-20 18:20:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 506 states have (on average 1.0375494071146245) internal successors, (525), 506 states have internal predecessors, (525), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 528 transitions. [2022-03-20 18:20:41,737 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 528 transitions. Word has length 201 [2022-03-20 18:20:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:41,737 INFO L478 AbstractCegarLoop]: Abstraction has 510 states and 528 transitions. [2022-03-20 18:20:41,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 99 states have internal predecessors, (198), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 528 transitions. [2022-03-20 18:20:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 18:20:41,738 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:41,738 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:41,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 18:20:41,945 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:41,946 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:41,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1944084178, now seen corresponding path program 59 times [2022-03-20 18:20:41,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:41,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1002273378] [2022-03-20 18:20:41,947 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:20:41,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1944084178, now seen corresponding path program 60 times [2022-03-20 18:20:41,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:41,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689444882] [2022-03-20 18:20:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:41,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:43,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:43,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689444882] [2022-03-20 18:20:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689444882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:20:43,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863336582] [2022-03-20 18:20:43,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:20:43,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:43,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:20:43,944 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:20:43,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 18:20:44,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 18:20:44,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:20:44,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 18:20:44,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:20:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:44,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:20:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:44,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863336582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:20:44,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:20:44,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 104 [2022-03-20 18:20:44,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1002273378] [2022-03-20 18:20:44,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1002273378] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:44,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:44,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-20 18:20:44,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264664634] [2022-03-20 18:20:44,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:44,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-20 18:20:44,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:44,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-20 18:20:44,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:20:44,837 INFO L87 Difference]: Start difference. First operand 510 states and 528 transitions. Second operand has 101 states, 101 states have (on average 1.9801980198019802) internal successors, (200), 100 states have internal predecessors, (200), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:48,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:48,430 INFO L93 Difference]: Finished difference Result 516 states and 534 transitions. [2022-03-20 18:20:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-20 18:20:48,430 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9801980198019802) internal successors, (200), 100 states have internal predecessors, (200), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-03-20 18:20:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:48,431 INFO L225 Difference]: With dead ends: 516 [2022-03-20 18:20:48,431 INFO L226 Difference]: Without dead ends: 513 [2022-03-20 18:20:48,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5146 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=15350, Invalid=25252, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 18:20:48,434 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 601 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:48,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 36 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:20:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-20 18:20:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 512. [2022-03-20 18:20:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 508 states have (on average 1.0374015748031495) internal successors, (527), 508 states have internal predecessors, (527), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 530 transitions. [2022-03-20 18:20:48,455 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 530 transitions. Word has length 203 [2022-03-20 18:20:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:48,455 INFO L478 AbstractCegarLoop]: Abstraction has 512 states and 530 transitions. [2022-03-20 18:20:48,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9801980198019802) internal successors, (200), 100 states have internal predecessors, (200), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 530 transitions. [2022-03-20 18:20:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 18:20:48,456 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:48,456 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:48,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 18:20:48,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-20 18:20:48,672 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash -53403892, now seen corresponding path program 61 times [2022-03-20 18:20:48,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:48,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2112033530] [2022-03-20 18:20:48,673 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:20:48,673 INFO L85 PathProgramCache]: Analyzing trace with hash -53403892, now seen corresponding path program 62 times [2022-03-20 18:20:48,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:48,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693735604] [2022-03-20 18:20:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:48,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:50,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:50,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693735604] [2022-03-20 18:20:50,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693735604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:20:50,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500070022] [2022-03-20 18:20:50,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:20:50,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:20:50,564 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:20:50,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 18:20:50,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:20:50,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:20:50,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 18:20:50,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:20:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:50,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:20:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:51,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500070022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:20:51,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:20:51,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 104 [2022-03-20 18:20:51,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:51,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2112033530] [2022-03-20 18:20:51,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2112033530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:51,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:51,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-20 18:20:51,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120414972] [2022-03-20 18:20:51,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:51,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-20 18:20:51,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:51,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-20 18:20:51,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:20:51,199 INFO L87 Difference]: Start difference. First operand 512 states and 530 transitions. Second operand has 102 states, 102 states have (on average 1.9803921568627452) internal successors, (202), 101 states have internal predecessors, (202), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:20:55,642 INFO L93 Difference]: Finished difference Result 518 states and 536 transitions. [2022-03-20 18:20:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 18:20:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9803921568627452) internal successors, (202), 101 states have internal predecessors, (202), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-03-20 18:20:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:20:55,644 INFO L225 Difference]: With dead ends: 518 [2022-03-20 18:20:55,644 INFO L226 Difference]: Without dead ends: 515 [2022-03-20 18:20:55,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 409 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-03-20 18:20:55,646 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 634 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 704 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:20:55,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 46 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [704 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:20:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-20 18:20:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 514. [2022-03-20 18:20:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 510 states have (on average 1.0372549019607844) internal successors, (529), 510 states have internal predecessors, (529), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 532 transitions. [2022-03-20 18:20:55,666 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 532 transitions. Word has length 205 [2022-03-20 18:20:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:20:55,666 INFO L478 AbstractCegarLoop]: Abstraction has 514 states and 532 transitions. [2022-03-20 18:20:55,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9803921568627452) internal successors, (202), 101 states have internal predecessors, (202), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:20:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 532 transitions. [2022-03-20 18:20:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-20 18:20:55,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:20:55,668 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:20:55,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 18:20:55,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-20 18:20:55,885 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:20:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:20:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash 210942150, now seen corresponding path program 63 times [2022-03-20 18:20:55,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:55,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1901036218] [2022-03-20 18:20:55,892 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:20:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash 210942150, now seen corresponding path program 64 times [2022-03-20 18:20:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:20:55,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435384913] [2022-03-20 18:20:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:20:55,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:20:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:57,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:20:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:20:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:57,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:20:57,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435384913] [2022-03-20 18:20:57,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435384913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:20:57,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884511683] [2022-03-20 18:20:57,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:20:57,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:20:57,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:20:57,948 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:20:57,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 18:20:58,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:20:58,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:20:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-20 18:20:58,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:20:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:58,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:20:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:20:58,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884511683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:20:58,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:20:58,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 104 [2022-03-20 18:20:58,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:20:58,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1901036218] [2022-03-20 18:20:58,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1901036218] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:20:58,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:20:58,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-20 18:20:58,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170192343] [2022-03-20 18:20:58,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:20:58,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-20 18:20:58,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:20:58,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-20 18:20:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:20:58,470 INFO L87 Difference]: Start difference. First operand 514 states and 532 transitions. Second operand has 103 states, 103 states have (on average 1.9805825242718447) internal successors, (204), 102 states have internal predecessors, (204), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:21:01,829 INFO L93 Difference]: Finished difference Result 519 states and 537 transitions. [2022-03-20 18:21:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-20 18:21:01,829 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9805825242718447) internal successors, (204), 102 states have internal predecessors, (204), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-03-20 18:21:01,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:21:01,830 INFO L225 Difference]: With dead ends: 519 [2022-03-20 18:21:01,830 INFO L226 Difference]: Without dead ends: 516 [2022-03-20 18:21:01,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2022-03-20 18:21:01,832 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 689 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:21:01,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [689 Valid, 51 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:21:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-03-20 18:21:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2022-03-20 18:21:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 512 states have (on average 1.037109375) internal successors, (531), 512 states have internal predecessors, (531), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 534 transitions. [2022-03-20 18:21:01,854 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 534 transitions. Word has length 207 [2022-03-20 18:21:01,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:21:01,854 INFO L478 AbstractCegarLoop]: Abstraction has 516 states and 534 transitions. [2022-03-20 18:21:01,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9805825242718447) internal successors, (204), 102 states have internal predecessors, (204), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:01,854 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 534 transitions. [2022-03-20 18:21:01,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-20 18:21:01,855 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:21:01,855 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:21:01,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 18:21:02,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:21:02,061 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:21:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:21:02,061 INFO L85 PathProgramCache]: Analyzing trace with hash 844418048, now seen corresponding path program 65 times [2022-03-20 18:21:02,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:02,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1410084642] [2022-03-20 18:21:02,062 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:21:02,062 INFO L85 PathProgramCache]: Analyzing trace with hash 844418048, now seen corresponding path program 66 times [2022-03-20 18:21:02,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:21:02,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022637496] [2022-03-20 18:21:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:21:02,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:21:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:03,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:21:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:03,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:21:03,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022637496] [2022-03-20 18:21:03,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022637496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:21:03,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030100593] [2022-03-20 18:21:03,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:21:03,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:21:03,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:21:03,405 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:21:03,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 18:21:03,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-20 18:21:03,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:21:03,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-20 18:21:03,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:21:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:04,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:21:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:05,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030100593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:21:05,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:21:05,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2022-03-20 18:21:05,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:21:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1410084642] [2022-03-20 18:21:05,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1410084642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:05,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:05,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 18:21:05,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451522337] [2022-03-20 18:21:05,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:21:05,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 18:21:05,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:05,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 18:21:05,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:21:05,185 INFO L87 Difference]: Start difference. First operand 516 states and 534 transitions. Second operand has 55 states, 55 states have (on average 3.7454545454545456) internal successors, (206), 54 states have internal predecessors, (206), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:21:13,892 INFO L93 Difference]: Finished difference Result 522 states and 540 transitions. [2022-03-20 18:21:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 18:21:13,892 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.7454545454545456) internal successors, (206), 54 states have internal predecessors, (206), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-03-20 18:21:13,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:21:13,893 INFO L225 Difference]: With dead ends: 522 [2022-03-20 18:21:13,894 INFO L226 Difference]: Without dead ends: 519 [2022-03-20 18:21:13,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 414 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=320, Invalid=11236, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 18:21:13,894 INFO L913 BasicCegarLoop]: 330 mSDtfsCounter, 502 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 27240 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 27598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 27240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:21:13,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 592 Invalid, 27598 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [358 Valid, 27240 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-03-20 18:21:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-20 18:21:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 518. [2022-03-20 18:21:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 514 states have (on average 1.0369649805447472) internal successors, (533), 514 states have internal predecessors, (533), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 536 transitions. [2022-03-20 18:21:13,920 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 536 transitions. Word has length 209 [2022-03-20 18:21:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:21:13,920 INFO L478 AbstractCegarLoop]: Abstraction has 518 states and 536 transitions. [2022-03-20 18:21:13,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.7454545454545456) internal successors, (206), 54 states have internal predecessors, (206), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 536 transitions. [2022-03-20 18:21:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-20 18:21:13,921 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:21:13,922 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:21:13,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 18:21:14,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 18:21:14,136 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:21:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:21:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash -270600006, now seen corresponding path program 67 times [2022-03-20 18:21:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:14,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [533166520] [2022-03-20 18:21:14,137 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:21:14,137 INFO L85 PathProgramCache]: Analyzing trace with hash -270600006, now seen corresponding path program 68 times [2022-03-20 18:21:14,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:21:14,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964380846] [2022-03-20 18:21:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:21:14,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:21:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:15,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:21:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:21:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 1156 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:21:15,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:21:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964380846] [2022-03-20 18:21:15,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964380846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:15,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:15,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:21:15,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:21:15,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [533166520] [2022-03-20 18:21:15,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [533166520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:21:15,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:21:15,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:21:15,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685226274] [2022-03-20 18:21:15,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:21:15,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 18:21:15,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:21:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 18:21:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:21:15,010 INFO L87 Difference]: Start difference. First operand 518 states and 536 transitions. Second operand has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:16,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:21:16,518 INFO L93 Difference]: Finished difference Result 518 states and 536 transitions. [2022-03-20 18:21:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 18:21:16,518 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-03-20 18:21:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:21:16,519 INFO L225 Difference]: With dead ends: 518 [2022-03-20 18:21:16,519 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 18:21:16,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 18:21:16,520 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 494 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:21:16,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 153 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:21:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 18:21:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 18:21:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 18:21:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 18:21:16,521 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2022-03-20 18:21:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:21:16,521 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 18:21:16,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:21:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 18:21:16,522 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 18:21:16,524 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 18:21:16,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-20 18:21:16,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.