/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/nla-digbench-scaling/hard2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 23:17:50,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 23:17:50,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 23:17:50,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 23:17:50,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 23:17:50,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 23:17:50,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 23:17:50,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 23:17:50,752 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 23:17:50,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 23:17:50,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 23:17:50,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 23:17:50,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 23:17:50,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 23:17:50,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 23:17:50,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 23:17:50,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 23:17:50,754 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 23:17:50,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 23:17:50,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 23:17:50,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 23:17:50,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 23:17:50,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 23:17:50,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:17:50,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 23:17:50,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 23:17:50,755 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 23:17:50,755 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 23:17:50,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 23:17:50,756 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 23:17:50,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 23:17:50,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 23:17:50,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 23:17:50,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 23:17:50,942 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 23:17:50,942 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 23:17:50,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-04-06 23:17:50,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f77ac9f5/fc798a1da83c4d20b4e3e141668c090d/FLAGe9428fbce [2022-04-06 23:17:51,330 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 23:17:51,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c [2022-04-06 23:17:51,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f77ac9f5/fc798a1da83c4d20b4e3e141668c090d/FLAGe9428fbce [2022-04-06 23:17:51,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f77ac9f5/fc798a1da83c4d20b4e3e141668c090d [2022-04-06 23:17:51,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 23:17:51,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 23:17:51,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 23:17:51,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 23:17:51,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 23:17:51,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:17:51" (1/1) ... [2022-04-06 23:17:51,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c127e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51, skipping insertion in model container [2022-04-06 23:17:51,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:17:51" (1/1) ... [2022-04-06 23:17:51,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 23:17:51,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 23:17:51,457 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-04-06 23:17:51,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:17:51,480 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 23:17:51,486 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound20.c[526,539] [2022-04-06 23:17:51,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:17:51,508 INFO L208 MainTranslator]: Completed translation [2022-04-06 23:17:51,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51 WrapperNode [2022-04-06 23:17:51,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 23:17:51,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 23:17:51,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 23:17:51,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 23:17:51,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51" (1/1) ... [2022-04-06 23:17:51,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51" (1/1) ... [2022-04-06 23:17:51,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51" (1/1) ... [2022-04-06 23:17:51,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51" (1/1) ... [2022-04-06 23:17:51,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51" (1/1) ... [2022-04-06 23:17:51,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51" (1/1) ... [2022-04-06 23:17:51,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51" (1/1) ... [2022-04-06 23:17:51,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 23:17:51,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 23:17:51,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 23:17:51,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 23:17:51,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51" (1/1) ... [2022-04-06 23:17:51,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:17:51,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:51,572 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) [2022-04-06 23:17:51,573 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 [2022-04-06 23:17:51,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 23:17:51,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 23:17:51,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 23:17:51,611 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 23:17:51,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 23:17:51,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 23:17:51,611 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 23:17:51,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 23:17:51,611 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 23:17:51,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 23:17:51,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 23:17:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 23:17:51,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 23:17:51,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 23:17:51,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 23:17:51,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 23:17:51,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 23:17:51,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 23:17:51,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 23:17:51,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 23:17:51,659 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 23:17:51,660 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 23:17:51,774 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 23:17:51,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 23:17:51,792 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 23:17:51,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:17:51 BoogieIcfgContainer [2022-04-06 23:17:51,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 23:17:51,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 23:17:51,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 23:17:51,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 23:17:51,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:17:51" (1/3) ... [2022-04-06 23:17:51,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1997ef27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:17:51, skipping insertion in model container [2022-04-06 23:17:51,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:17:51" (2/3) ... [2022-04-06 23:17:51,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1997ef27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:17:51, skipping insertion in model container [2022-04-06 23:17:51,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:17:51" (3/3) ... [2022-04-06 23:17:51,812 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound20.c [2022-04-06 23:17:51,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 23:17:51,815 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 23:17:51,840 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 23:17:51,844 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 [2022-04-06 23:17:51,844 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 23:17:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 23:17:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 23:17:51,858 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:51,858 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:51,858 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2022-04-06 23:17:51,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:51,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [579266062] [2022-04-06 23:17:51,873 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:17:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 2 times [2022-04-06 23:17:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:51,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740901586] [2022-04-06 23:17:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:51,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:17:51,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:17:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:17:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:17:51,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:51,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740901586] [2022-04-06 23:17:51,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740901586] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:51,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:51,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:17:51,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:51,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [579266062] [2022-04-06 23:17:51,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [579266062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:51,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:51,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:17:51,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241273844] [2022-04-06 23:17:51,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:51,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 23:17:51,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:52,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 23:17:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:17:52,013 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 23:17:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:52,082 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-04-06 23:17:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 23:17:52,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 23:17:52,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:52,089 INFO L225 Difference]: With dead ends: 57 [2022-04-06 23:17:52,089 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 23:17:52,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:17:52,093 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:52,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:17:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 23:17:52,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-06 23:17:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 23:17:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-04-06 23:17:52,122 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-04-06 23:17:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:52,122 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-04-06 23:17:52,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 23:17:52,124 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-04-06 23:17:52,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 23:17:52,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:52,139 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:52,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 23:17:52,139 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:52,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2022-04-06 23:17:52,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:52,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2018358224] [2022-04-06 23:17:52,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:17:52,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 2 times [2022-04-06 23:17:52,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:52,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008764354] [2022-04-06 23:17:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:52,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:17:52,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:17:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:17:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:17:52,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:52,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008764354] [2022-04-06 23:17:52,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008764354] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:52,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:52,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:17:52,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:52,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2018358224] [2022-04-06 23:17:52,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2018358224] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:52,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:52,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:17:52,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184989288] [2022-04-06 23:17:52,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:52,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:17:52,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:17:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:17:52,244 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 23:17:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:52,400 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-04-06 23:17:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:17:52,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 23:17:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:52,403 INFO L225 Difference]: With dead ends: 41 [2022-04-06 23:17:52,404 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 23:17:52,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:17:52,409 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:52,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 85 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:17:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 23:17:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-04-06 23:17:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 23:17:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-04-06 23:17:52,433 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-04-06 23:17:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:52,434 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-04-06 23:17:52,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 23:17:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-04-06 23:17:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 23:17:52,435 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:52,435 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:52,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 23:17:52,436 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:52,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:52,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2022-04-06 23:17:52,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:52,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1770994725] [2022-04-06 23:17:52,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:17:52,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 2 times [2022-04-06 23:17:52,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:52,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104345664] [2022-04-06 23:17:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:52,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:17:52,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:17:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:17:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:17:52,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:52,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104345664] [2022-04-06 23:17:52,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104345664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:52,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:52,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 23:17:52,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:52,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1770994725] [2022-04-06 23:17:52,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1770994725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:52,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:52,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 23:17:52,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242786258] [2022-04-06 23:17:52,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:52,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:17:52,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:52,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:17:52,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:17:52,514 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 23:17:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:52,578 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-04-06 23:17:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:17:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 23:17:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:52,580 INFO L225 Difference]: With dead ends: 46 [2022-04-06 23:17:52,580 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 23:17:52,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:17:52,583 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:52,586 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:17:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 23:17:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 23:17:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 23:17:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 23:17:52,600 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-04-06 23:17:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:52,600 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 23:17:52,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 23:17:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 23:17:52,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 23:17:52,601 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:52,601 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:52,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 23:17:52,603 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2022-04-06 23:17:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:52,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1420312651] [2022-04-06 23:17:52,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:17:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 2 times [2022-04-06 23:17:52,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:52,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659783508] [2022-04-06 23:17:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:52,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:17:52,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:17:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:17:52,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 23:17:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:17:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:17:52,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:52,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659783508] [2022-04-06 23:17:52,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659783508] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:52,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:52,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:17:52,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:52,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1420312651] [2022-04-06 23:17:52,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1420312651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:52,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:52,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:17:52,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171393815] [2022-04-06 23:17:52,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:52,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:17:52,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:52,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:17:52,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:17:52,676 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 23:17:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:52,776 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-04-06 23:17:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:17:52,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-04-06 23:17:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:52,778 INFO L225 Difference]: With dead ends: 46 [2022-04-06 23:17:52,778 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 23:17:52,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:17:52,780 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:52,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 78 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:17:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 23:17:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-04-06 23:17:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 23:17:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-04-06 23:17:52,788 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-04-06 23:17:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:52,788 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-04-06 23:17:52,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 23:17:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-04-06 23:17:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 23:17:52,789 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:52,789 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:52,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 23:17:52,789 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:52,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2022-04-06 23:17:52,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:52,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138587697] [2022-04-06 23:17:52,790 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:17:52,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 2 times [2022-04-06 23:17:52,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:52,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313041967] [2022-04-06 23:17:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:52,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:52,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:52,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975730158] [2022-04-06 23:17:52,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:17:52,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:52,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:52,802 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) [2022-04-06 23:17:52,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 23:17:52,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:17:52,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:52,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 23:17:52,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 23:17:52,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:17:52,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:52,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313041967] [2022-04-06 23:17:52,993 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:52,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975730158] [2022-04-06 23:17:52,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975730158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:52,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:52,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:17:52,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:52,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [138587697] [2022-04-06 23:17:52,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [138587697] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:52,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:52,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:17:52,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951870037] [2022-04-06 23:17:52,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:52,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:17:52,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:17:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:17:52,995 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 23:17:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:53,040 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-04-06 23:17:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:17:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 23:17:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:53,042 INFO L225 Difference]: With dead ends: 65 [2022-04-06 23:17:53,042 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 23:17:53,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:17:53,042 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:53,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 121 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:17:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 23:17:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-06 23:17:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 23:17:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-06 23:17:53,061 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-04-06 23:17:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:53,061 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-06 23:17:53,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 23:17:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-06 23:17:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 23:17:53,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:53,062 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:53,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 23:17:53,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:53,280 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:53,280 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2022-04-06 23:17:53,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:53,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [888073713] [2022-04-06 23:17:53,281 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:17:53,281 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 2 times [2022-04-06 23:17:53,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:53,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754568033] [2022-04-06 23:17:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:53,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:53,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:53,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58848706] [2022-04-06 23:17:53,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:17:53,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:53,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:53,299 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) [2022-04-06 23:17:53,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 23:17:53,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:17:53,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:53,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:17:53,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 23:17:53,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:17:53,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:53,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754568033] [2022-04-06 23:17:53,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:53,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58848706] [2022-04-06 23:17:53,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58848706] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:53,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:53,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:17:53,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [888073713] [2022-04-06 23:17:53,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [888073713] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:53,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:53,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:17:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749475353] [2022-04-06 23:17:53,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:53,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:17:53,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:53,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:17:53,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:17:53,455 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 23:17:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:53,476 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-04-06 23:17:53,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:17:53,477 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-04-06 23:17:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:53,478 INFO L225 Difference]: With dead ends: 70 [2022-04-06 23:17:53,478 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 23:17:53,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:17:53,478 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:53,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:17:53,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 23:17:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-06 23:17:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 23:17:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-04-06 23:17:53,486 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-04-06 23:17:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:53,486 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-04-06 23:17:53,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 23:17:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-04-06 23:17:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 23:17:53,487 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:53,487 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:53,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 23:17:53,689 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,SelfDestructingSolverStorable5 [2022-04-06 23:17:53,690 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:53,690 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 1 times [2022-04-06 23:17:53,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:53,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1532448515] [2022-04-06 23:17:53,691 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:17:53,691 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 2 times [2022-04-06 23:17:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:53,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832761921] [2022-04-06 23:17:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:53,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:53,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:53,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698198188] [2022-04-06 23:17:53,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:17:53,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:53,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:53,706 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) [2022-04-06 23:17:53,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 23:17:53,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:17:53,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:17:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 23:17:53,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:17:53,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:53,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832761921] [2022-04-06 23:17:53,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:53,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698198188] [2022-04-06 23:17:53,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698198188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:53,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:53,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:17:53,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:53,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1532448515] [2022-04-06 23:17:53,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1532448515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:53,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:53,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:17:53,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581285085] [2022-04-06 23:17:53,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:53,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:17:53,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:53,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:17:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:17:53,845 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 23:17:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:53,894 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-04-06 23:17:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:17:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-04-06 23:17:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:53,898 INFO L225 Difference]: With dead ends: 76 [2022-04-06 23:17:53,898 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 23:17:53,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:17:53,900 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:53,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 95 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:17:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 23:17:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 23:17:53,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 23:17:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-04-06 23:17:53,923 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-04-06 23:17:53,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:53,923 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-04-06 23:17:53,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 23:17:53,923 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-04-06 23:17:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 23:17:53,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:53,928 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:53,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 23:17:54,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:54,144 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2022-04-06 23:17:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:54,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1957067836] [2022-04-06 23:17:54,160 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:17:54,160 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:17:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 2 times [2022-04-06 23:17:54,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:54,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211920963] [2022-04-06 23:17:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:54,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:54,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:54,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111678408] [2022-04-06 23:17:54,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:17:54,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:54,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:54,170 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) [2022-04-06 23:17:54,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 23:17:54,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:17:54,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:54,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:17:54,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 23:17:54,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:17:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 23:17:54,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211920963] [2022-04-06 23:17:54,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111678408] [2022-04-06 23:17:54,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111678408] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:17:54,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:17:54,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 23:17:54,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:54,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1957067836] [2022-04-06 23:17:54,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1957067836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:54,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:54,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:17:54,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592639154] [2022-04-06 23:17:54,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:54,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:17:54,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:17:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 23:17:54,427 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 23:17:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:54,459 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-04-06 23:17:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:17:54,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2022-04-06 23:17:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:54,462 INFO L225 Difference]: With dead ends: 90 [2022-04-06 23:17:54,463 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 23:17:54,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 23:17:54,466 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:54,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 126 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:17:54,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 23:17:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-04-06 23:17:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 23:17:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-04-06 23:17:54,485 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2022-04-06 23:17:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:54,486 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-04-06 23:17:54,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 23:17:54,486 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-04-06 23:17:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 23:17:54,487 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:54,487 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:54,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 23:17:54,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:54,695 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:54,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2022-04-06 23:17:54,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:54,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1745842798] [2022-04-06 23:17:54,700 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:17:54,700 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:17:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 2 times [2022-04-06 23:17:54,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:54,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626425689] [2022-04-06 23:17:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:54,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:54,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:54,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069286220] [2022-04-06 23:17:54,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:17:54,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:54,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:54,707 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) [2022-04-06 23:17:54,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 23:17:54,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:17:54,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:54,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 23:17:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 23:17:54,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:17:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 23:17:54,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:54,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626425689] [2022-04-06 23:17:54,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:54,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069286220] [2022-04-06 23:17:54,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069286220] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 23:17:54,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:17:54,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 23:17:54,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:54,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1745842798] [2022-04-06 23:17:54,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1745842798] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:54,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:54,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:17:54,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042825766] [2022-04-06 23:17:54,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:54,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:17:54,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:54,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:17:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 23:17:54,956 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 23:17:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:54,994 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2022-04-06 23:17:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:17:54,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-04-06 23:17:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:54,995 INFO L225 Difference]: With dead ends: 78 [2022-04-06 23:17:54,995 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 23:17:54,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 23:17:54,995 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:54,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:17:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 23:17:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-04-06 23:17:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 49 states have internal predecessors, (56), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 23:17:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-04-06 23:17:55,002 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 40 [2022-04-06 23:17:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:55,002 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-04-06 23:17:55,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 23:17:55,002 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-04-06 23:17:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 23:17:55,003 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:55,003 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:55,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 23:17:55,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:55,219 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash 529029787, now seen corresponding path program 1 times [2022-04-06 23:17:55,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:55,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1460720276] [2022-04-06 23:17:55,224 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:17:55,224 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:17:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash 529029787, now seen corresponding path program 2 times [2022-04-06 23:17:55,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:55,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392280739] [2022-04-06 23:17:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:55,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:55,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:55,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082194811] [2022-04-06 23:17:55,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:17:55,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:55,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:55,233 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) [2022-04-06 23:17:55,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 23:17:55,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:17:55,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:55,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 23:17:55,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 23:17:55,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:17:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 23:17:55,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:55,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392280739] [2022-04-06 23:17:55,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:55,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082194811] [2022-04-06 23:17:55,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082194811] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:17:55,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:17:55,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 23:17:55,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:55,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1460720276] [2022-04-06 23:17:55,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1460720276] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:55,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:55,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:17:55,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984684179] [2022-04-06 23:17:55,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:55,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:17:55,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:55,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:17:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:17:55,477 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 23:17:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:55,506 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-04-06 23:17:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:17:55,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2022-04-06 23:17:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:55,509 INFO L225 Difference]: With dead ends: 104 [2022-04-06 23:17:55,509 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 23:17:55,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:17:55,510 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:55,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:17:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 23:17:55,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-04-06 23:17:55,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 23:17:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-04-06 23:17:55,522 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 53 [2022-04-06 23:17:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:55,523 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-04-06 23:17:55,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 23:17:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-04-06 23:17:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 23:17:55,524 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:55,524 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:55,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 23:17:55,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:55,735 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1864650262, now seen corresponding path program 3 times [2022-04-06 23:17:55,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:55,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [513375498] [2022-04-06 23:17:55,739 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:17:55,739 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:17:55,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1864650262, now seen corresponding path program 4 times [2022-04-06 23:17:55,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:55,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476618597] [2022-04-06 23:17:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:55,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:55,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:55,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246295077] [2022-04-06 23:17:55,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:17:55,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:55,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:55,750 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) [2022-04-06 23:17:55,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 23:17:55,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:17:55,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:55,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 23:17:55,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 23:17:55,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:17:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 23:17:55,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:55,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476618597] [2022-04-06 23:17:55,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:55,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246295077] [2022-04-06 23:17:55,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246295077] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:17:55,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:17:55,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 23:17:55,947 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:55,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [513375498] [2022-04-06 23:17:55,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [513375498] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:55,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:55,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:17:55,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912860698] [2022-04-06 23:17:55,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:55,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:17:55,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:55,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:17:55,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:17:55,948 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 23:17:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:55,982 INFO L93 Difference]: Finished difference Result 126 states and 155 transitions. [2022-04-06 23:17:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:17:55,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-04-06 23:17:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:55,986 INFO L225 Difference]: With dead ends: 126 [2022-04-06 23:17:55,986 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 23:17:55,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-06 23:17:55,987 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:55,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 134 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:17:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 23:17:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-04-06 23:17:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 63 states have internal predecessors, (71), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 23:17:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-04-06 23:17:55,996 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 55 [2022-04-06 23:17:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:55,996 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-04-06 23:17:55,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 23:17:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-04-06 23:17:55,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 23:17:55,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:55,997 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:56,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 23:17:56,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:56,204 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:56,204 INFO L85 PathProgramCache]: Analyzing trace with hash -43330764, now seen corresponding path program 1 times [2022-04-06 23:17:56,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:56,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [847599583] [2022-04-06 23:17:56,207 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:17:56,207 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:17:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash -43330764, now seen corresponding path program 2 times [2022-04-06 23:17:56,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:56,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111238899] [2022-04-06 23:17:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:56,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:56,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:56,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108418631] [2022-04-06 23:17:56,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:17:56,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:56,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:56,214 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) [2022-04-06 23:17:56,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 23:17:56,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:17:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:56,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 23:17:56,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 23:17:56,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:17:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:17:56,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:56,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111238899] [2022-04-06 23:17:56,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:56,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108418631] [2022-04-06 23:17:56,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108418631] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:17:56,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:17:56,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 23:17:56,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:56,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [847599583] [2022-04-06 23:17:56,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [847599583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:56,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:56,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:17:56,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216776431] [2022-04-06 23:17:56,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:56,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:17:56,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:56,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:17:56,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 23:17:56,494 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 23:17:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:56,553 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2022-04-06 23:17:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:17:56,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 62 [2022-04-06 23:17:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:56,554 INFO L225 Difference]: With dead ends: 145 [2022-04-06 23:17:56,554 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 23:17:56,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-04-06 23:17:56,555 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 27 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:56,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 150 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:17:56,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 23:17:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-04-06 23:17:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 83 states have (on average 1.1686746987951808) internal successors, (97), 86 states have internal predecessors, (97), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 23:17:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2022-04-06 23:17:56,564 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 62 [2022-04-06 23:17:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:56,564 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2022-04-06 23:17:56,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 23:17:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2022-04-06 23:17:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 23:17:56,565 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:56,565 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:56,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 23:17:56,780 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,SelfDestructingSolverStorable11 [2022-04-06 23:17:56,780 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:56,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:56,781 INFO L85 PathProgramCache]: Analyzing trace with hash -41602886, now seen corresponding path program 1 times [2022-04-06 23:17:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:56,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [366748476] [2022-04-06 23:17:56,783 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:17:56,783 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:17:56,783 INFO L85 PathProgramCache]: Analyzing trace with hash -41602886, now seen corresponding path program 2 times [2022-04-06 23:17:56,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:56,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492793122] [2022-04-06 23:17:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:56,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:56,789 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:56,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805358523] [2022-04-06 23:17:56,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:17:56,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:56,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:56,790 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) [2022-04-06 23:17:56,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 23:17:56,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:17:56,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:56,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 23:17:56,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:17:57,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:17:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:17:57,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:57,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492793122] [2022-04-06 23:17:57,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:57,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805358523] [2022-04-06 23:17:57,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805358523] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:17:57,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:17:57,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 23:17:57,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [366748476] [2022-04-06 23:17:57,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [366748476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:57,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:57,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:17:57,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853205896] [2022-04-06 23:17:57,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:57,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:17:57,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:57,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:17:57,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:17:57,853 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 23:17:57,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:57,974 INFO L93 Difference]: Finished difference Result 181 states and 219 transitions. [2022-04-06 23:17:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:17:57,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-04-06 23:17:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:57,975 INFO L225 Difference]: With dead ends: 181 [2022-04-06 23:17:57,975 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 23:17:57,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 23:17:57,976 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:57,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 187 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:17:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 23:17:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-04-06 23:17:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 92 states have internal predecessors, (104), 27 states have call successors, (27), 19 states have call predecessors, (27), 18 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 23:17:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2022-04-06 23:17:57,988 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 62 [2022-04-06 23:17:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:57,988 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2022-04-06 23:17:57,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 23:17:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2022-04-06 23:17:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 23:17:57,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:57,989 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:58,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 23:17:58,199 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,SelfDestructingSolverStorable12 [2022-04-06 23:17:58,199 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash -378736343, now seen corresponding path program 3 times [2022-04-06 23:17:58,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:58,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1928527289] [2022-04-06 23:17:58,203 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:17:58,203 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:17:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash -378736343, now seen corresponding path program 4 times [2022-04-06 23:17:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:58,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830495744] [2022-04-06 23:17:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:58,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:58,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571723131] [2022-04-06 23:17:58,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:17:58,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:58,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:58,209 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) [2022-04-06 23:17:58,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 23:17:58,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:17:58,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:58,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 23:17:58,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 48 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 23:17:58,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:17:58,624 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:17:58,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:58,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830495744] [2022-04-06 23:17:58,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:58,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571723131] [2022-04-06 23:17:58,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571723131] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 23:17:58,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:17:58,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 23:17:58,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:58,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1928527289] [2022-04-06 23:17:58,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1928527289] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:58,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:58,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 23:17:58,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644927071] [2022-04-06 23:17:58,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:58,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 23:17:58,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:58,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 23:17:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-04-06 23:17:58,667 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-04-06 23:17:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:58,888 INFO L93 Difference]: Finished difference Result 188 states and 232 transitions. [2022-04-06 23:17:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 23:17:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 67 [2022-04-06 23:17:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:58,890 INFO L225 Difference]: With dead ends: 188 [2022-04-06 23:17:58,890 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 23:17:58,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:17:58,891 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 40 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:58,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 246 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 333 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-04-06 23:17:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 23:17:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2022-04-06 23:17:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 107 states have internal predecessors, (121), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 23:17:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2022-04-06 23:17:58,902 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 67 [2022-04-06 23:17:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:58,903 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2022-04-06 23:17:58,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-04-06 23:17:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2022-04-06 23:17:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 23:17:58,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:58,903 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:58,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 23:17:59,123 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,SelfDestructingSolverStorable13 [2022-04-06 23:17:59,123 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:17:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:17:59,124 INFO L85 PathProgramCache]: Analyzing trace with hash 73149133, now seen corresponding path program 1 times [2022-04-06 23:17:59,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:59,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2084048518] [2022-04-06 23:17:59,127 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:17:59,127 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:17:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash 73149133, now seen corresponding path program 2 times [2022-04-06 23:17:59,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:17:59,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283547829] [2022-04-06 23:17:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:17:59,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:17:59,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:17:59,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059039299] [2022-04-06 23:17:59,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:17:59,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:17:59,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:17:59,139 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) [2022-04-06 23:17:59,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 23:17:59,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:17:59,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:17:59,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 23:17:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:17:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 62 proven. 32 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 23:17:59,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:17:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-04-06 23:17:59,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:17:59,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283547829] [2022-04-06 23:17:59,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:17:59,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059039299] [2022-04-06 23:17:59,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059039299] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:17:59,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:17:59,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 23:17:59,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:17:59,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2084048518] [2022-04-06 23:17:59,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2084048518] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:17:59,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:17:59,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 23:17:59,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184716749] [2022-04-06 23:17:59,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:17:59,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 23:17:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:17:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 23:17:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:17:59,763 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 23:17:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:17:59,925 INFO L93 Difference]: Finished difference Result 186 states and 221 transitions. [2022-04-06 23:17:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:17:59,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2022-04-06 23:17:59,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:17:59,926 INFO L225 Difference]: With dead ends: 186 [2022-04-06 23:17:59,926 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 23:17:59,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:17:59,927 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:17:59,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 147 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:17:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 23:17:59,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-04-06 23:17:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.180722891566265) internal successors, (98), 87 states have internal predecessors, (98), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 23:17:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2022-04-06 23:17:59,957 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 73 [2022-04-06 23:17:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:17:59,957 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2022-04-06 23:17:59,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 23:17:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2022-04-06 23:17:59,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 23:17:59,959 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:17:59,959 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:17:59,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 23:18:00,187 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,SelfDestructingSolverStorable14 [2022-04-06 23:18:00,188 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:18:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:18:00,188 INFO L85 PathProgramCache]: Analyzing trace with hash 469209008, now seen corresponding path program 5 times [2022-04-06 23:18:00,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:18:00,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1429214667] [2022-04-06 23:18:00,192 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:18:00,192 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:18:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash 469209008, now seen corresponding path program 6 times [2022-04-06 23:18:00,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:18:00,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550434189] [2022-04-06 23:18:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:18:00,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:18:00,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:18:00,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174670383] [2022-04-06 23:18:00,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:18:00,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:18:00,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:18:00,224 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) [2022-04-06 23:18:00,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 23:18:00,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 23:18:00,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:18:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 23:18:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:18:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 23:18:00,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:18:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 23:18:00,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:18:00,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550434189] [2022-04-06 23:18:00,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:18:00,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174670383] [2022-04-06 23:18:00,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174670383] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:18:00,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:18:00,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 23:18:00,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:18:00,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1429214667] [2022-04-06 23:18:00,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1429214667] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:18:00,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:18:00,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:18:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955870311] [2022-04-06 23:18:00,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:18:00,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:18:00,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:18:00,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:18:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-06 23:18:00,500 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 23:18:00,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:18:00,553 INFO L93 Difference]: Finished difference Result 170 states and 207 transitions. [2022-04-06 23:18:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:18:00,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2022-04-06 23:18:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:18:00,555 INFO L225 Difference]: With dead ends: 170 [2022-04-06 23:18:00,555 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 23:18:00,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-04-06 23:18:00,555 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:18:00,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 186 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:18:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 23:18:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-04-06 23:18:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 89 states have internal predecessors, (100), 28 states have call successors, (28), 18 states have call predecessors, (28), 17 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 23:18:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2022-04-06 23:18:00,569 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 73 [2022-04-06 23:18:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:18:00,569 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2022-04-06 23:18:00,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 23:18:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2022-04-06 23:18:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 23:18:00,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:18:00,571 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:18:00,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 23:18:00,784 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,SelfDestructingSolverStorable15 [2022-04-06 23:18:00,784 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:18:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:18:00,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1997631578, now seen corresponding path program 3 times [2022-04-06 23:18:00,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:18:00,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371035966] [2022-04-06 23:18:00,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:18:00,788 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:18:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1997631578, now seen corresponding path program 4 times [2022-04-06 23:18:00,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:18:00,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088536130] [2022-04-06 23:18:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:18:00,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:18:00,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:18:00,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839340963] [2022-04-06 23:18:00,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:18:00,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:18:00,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:18:00,796 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) [2022-04-06 23:18:00,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 23:18:00,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:18:00,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:18:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 23:18:00,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:18:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 23:18:00,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:18:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 23:18:01,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:18:01,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088536130] [2022-04-06 23:18:01,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:18:01,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839340963] [2022-04-06 23:18:01,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839340963] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:18:01,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:18:01,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 23:18:01,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:18:01,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371035966] [2022-04-06 23:18:01,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371035966] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:18:01,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:18:01,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 23:18:01,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259124937] [2022-04-06 23:18:01,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:18:01,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 23:18:01,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:18:01,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 23:18:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:18:01,123 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 23:18:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:18:01,189 INFO L93 Difference]: Finished difference Result 181 states and 209 transitions. [2022-04-06 23:18:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:18:01,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2022-04-06 23:18:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:18:01,191 INFO L225 Difference]: With dead ends: 181 [2022-04-06 23:18:01,191 INFO L226 Difference]: Without dead ends: 166 [2022-04-06 23:18:01,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2022-04-06 23:18:01,191 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 29 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:18:01,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 171 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:18:01,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-04-06 23:18:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2022-04-06 23:18:01,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 110 states have internal predecessors, (123), 35 states have call successors, (35), 23 states have call predecessors, (35), 21 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 23:18:01,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 190 transitions. [2022-04-06 23:18:01,202 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 190 transitions. Word has length 80 [2022-04-06 23:18:01,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:18:01,203 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 190 transitions. [2022-04-06 23:18:01,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 23:18:01,203 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 190 transitions. [2022-04-06 23:18:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 23:18:01,204 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:18:01,204 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:18:01,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 23:18:01,419 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,SelfDestructingSolverStorable16 [2022-04-06 23:18:01,419 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:18:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:18:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1999359456, now seen corresponding path program 5 times [2022-04-06 23:18:01,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:18:01,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [793374115] [2022-04-06 23:18:01,422 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:18:01,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:18:01,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1999359456, now seen corresponding path program 6 times [2022-04-06 23:18:01,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:18:01,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257459753] [2022-04-06 23:18:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:18:01,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:18:01,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:18:01,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375838756] [2022-04-06 23:18:01,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:18:01,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:18:01,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:18:01,428 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) [2022-04-06 23:18:01,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 23:18:01,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 23:18:01,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:18:01,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 23:18:01,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:18:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 23:18:01,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:18:37,028 WARN L232 SmtUtils]: Spent 17.06s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:19:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 23:19:30,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:19:30,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257459753] [2022-04-06 23:19:30,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:19:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375838756] [2022-04-06 23:19:30,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375838756] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:19:30,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:19:30,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-04-06 23:19:30,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:19:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [793374115] [2022-04-06 23:19:30,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [793374115] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:19:30,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:19:30,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:19:30,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334886684] [2022-04-06 23:19:30,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:19:30,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:19:30,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:19:30,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:19:30,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2022-04-06 23:19:30,308 INFO L87 Difference]: Start difference. First operand 163 states and 190 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 23:19:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:19:32,480 INFO L93 Difference]: Finished difference Result 193 states and 224 transitions. [2022-04-06 23:19:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:19:32,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 80 [2022-04-06 23:19:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:19:32,481 INFO L225 Difference]: With dead ends: 193 [2022-04-06 23:19:32,481 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 23:19:32,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=70, Invalid=234, Unknown=2, NotChecked=0, Total=306 [2022-04-06 23:19:32,482 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:19:32,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 126 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:19:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 23:19:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2022-04-06 23:19:32,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 115 states have internal predecessors, (128), 35 states have call successors, (35), 23 states have call predecessors, (35), 22 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 23:19:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2022-04-06 23:19:32,493 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 80 [2022-04-06 23:19:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:19:32,493 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2022-04-06 23:19:32,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 23:19:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2022-04-06 23:19:32,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 23:19:32,494 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:19:32,494 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:19:32,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 23:19:32,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:19:32,699 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:19:32,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:19:32,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1035991527, now seen corresponding path program 3 times [2022-04-06 23:19:32,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:19:32,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617336374] [2022-04-06 23:19:32,702 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:19:32,702 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:19:32,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1035991527, now seen corresponding path program 4 times [2022-04-06 23:19:32,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:19:32,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901527071] [2022-04-06 23:19:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:19:32,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:19:32,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:19:32,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469202348] [2022-04-06 23:19:32,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:19:32,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:19:32,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:19:32,711 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) [2022-04-06 23:19:32,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 23:19:32,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:19:32,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:19:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 23:19:32,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:19:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:19:32,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:19:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:19:33,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:19:33,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901527071] [2022-04-06 23:19:33,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:19:33,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469202348] [2022-04-06 23:19:33,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469202348] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:19:33,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:19:33,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-04-06 23:19:33,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:19:33,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617336374] [2022-04-06 23:19:33,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617336374] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:19:33,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:19:33,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 23:19:33,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082217510] [2022-04-06 23:19:33,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:19:33,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 23:19:33,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:19:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 23:19:33,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:19:33,088 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 23:19:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:19:33,145 INFO L93 Difference]: Finished difference Result 197 states and 235 transitions. [2022-04-06 23:19:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 23:19:33,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 91 [2022-04-06 23:19:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:19:33,147 INFO L225 Difference]: With dead ends: 197 [2022-04-06 23:19:33,147 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 23:19:33,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:19:33,147 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:19:33,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:19:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 23:19:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2022-04-06 23:19:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 122 states have internal predecessors, (138), 39 states have call successors, (39), 23 states have call predecessors, (39), 22 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 23:19:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2022-04-06 23:19:33,163 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 91 [2022-04-06 23:19:33,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:19:33,164 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2022-04-06 23:19:33,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 23:19:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2022-04-06 23:19:33,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 23:19:33,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:19:33,165 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:19:33,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 23:19:33,368 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:19:33,369 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:19:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:19:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1432051402, now seen corresponding path program 7 times [2022-04-06 23:19:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:19:33,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1992700822] [2022-04-06 23:19:33,371 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:19:33,372 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:19:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1432051402, now seen corresponding path program 8 times [2022-04-06 23:19:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:19:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173549450] [2022-04-06 23:19:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:19:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:19:33,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:19:33,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053126372] [2022-04-06 23:19:33,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:19:33,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:19:33,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:19:33,378 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) [2022-04-06 23:19:33,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 23:19:33,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:19:33,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:19:33,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 23:19:33,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:19:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-04-06 23:19:33,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:19:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 26 proven. 44 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:19:33,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:19:33,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173549450] [2022-04-06 23:19:33,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:19:33,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053126372] [2022-04-06 23:19:33,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053126372] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:19:33,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:19:33,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 23:19:33,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:19:33,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1992700822] [2022-04-06 23:19:33,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1992700822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:19:33,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:19:33,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 23:19:33,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964679917] [2022-04-06 23:19:33,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:19:33,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 23:19:33,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:19:33,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 23:19:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:19:33,802 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 23:19:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:19:33,880 INFO L93 Difference]: Finished difference Result 242 states and 300 transitions. [2022-04-06 23:19:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 23:19:33,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 91 [2022-04-06 23:19:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:19:33,883 INFO L225 Difference]: With dead ends: 242 [2022-04-06 23:19:33,883 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 23:19:33,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:19:33,884 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:19:33,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 176 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:19:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 23:19:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-04-06 23:19:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 124 states have internal predecessors, (140), 39 states have call successors, (39), 23 states have call predecessors, (39), 22 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 23:19:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2022-04-06 23:19:33,901 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 91 [2022-04-06 23:19:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:19:33,901 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2022-04-06 23:19:33,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 23:19:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2022-04-06 23:19:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 23:19:33,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:19:33,904 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:19:33,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 23:19:34,117 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:19:34,118 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:19:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:19:34,118 INFO L85 PathProgramCache]: Analyzing trace with hash -614243194, now seen corresponding path program 5 times [2022-04-06 23:19:34,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:19:34,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1576596608] [2022-04-06 23:19:34,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:19:34,120 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:19:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash -614243194, now seen corresponding path program 6 times [2022-04-06 23:19:34,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:19:34,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192940822] [2022-04-06 23:19:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:19:34,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:19:34,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:19:34,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73848286] [2022-04-06 23:19:34,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:19:34,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:19:34,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:19:34,127 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) [2022-04-06 23:19:34,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 23:19:34,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:19:34,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:19:34,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 23:19:34,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:19:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 296 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 23:19:34,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:19:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:19:34,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:19:34,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192940822] [2022-04-06 23:19:34,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:19:34,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73848286] [2022-04-06 23:19:34,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73848286] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:19:34,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:19:34,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 23:19:34,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:19:34,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1576596608] [2022-04-06 23:19:34,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1576596608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:19:34,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:19:34,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 23:19:34,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045758676] [2022-04-06 23:19:34,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:19:34,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 23:19:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:19:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 23:19:34,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:19:34,536 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 8 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 23:19:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:19:34,645 INFO L93 Difference]: Finished difference Result 240 states and 281 transitions. [2022-04-06 23:19:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 23:19:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 8 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 94 [2022-04-06 23:19:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:19:34,646 INFO L225 Difference]: With dead ends: 240 [2022-04-06 23:19:34,646 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 23:19:34,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:19:34,647 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 41 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:19:34,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 199 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:19:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 23:19:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-04-06 23:19:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 151 states have (on average 1.1456953642384107) internal successors, (173), 155 states have internal predecessors, (173), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 23:19:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2022-04-06 23:19:34,661 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 94 [2022-04-06 23:19:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:19:34,662 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2022-04-06 23:19:34,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 8 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 23:19:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2022-04-06 23:19:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 23:19:34,663 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:19:34,663 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:19:34,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 23:19:34,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:19:34,879 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:19:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:19:34,880 INFO L85 PathProgramCache]: Analyzing trace with hash -612515316, now seen corresponding path program 7 times [2022-04-06 23:19:34,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:19:34,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1691991446] [2022-04-06 23:19:34,882 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:19:34,882 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:19:34,882 INFO L85 PathProgramCache]: Analyzing trace with hash -612515316, now seen corresponding path program 8 times [2022-04-06 23:19:34,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:19:34,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523400405] [2022-04-06 23:19:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:19:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:19:34,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:19:34,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003786060] [2022-04-06 23:19:34,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:19:34,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:19:34,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:19:34,889 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) [2022-04-06 23:19:34,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 23:19:34,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:19:34,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:19:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 23:19:34,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:19:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:19:35,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:20:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:20:01,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:20:01,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523400405] [2022-04-06 23:20:01,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:20:01,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003786060] [2022-04-06 23:20:01,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003786060] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:20:01,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:20:01,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 23:20:01,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:20:01,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1691991446] [2022-04-06 23:20:01,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1691991446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:20:01,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:20:01,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 23:20:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636131132] [2022-04-06 23:20:01,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:20:01,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 23:20:01,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:20:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 23:20:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2022-04-06 23:20:01,190 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 23:20:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:20:01,464 INFO L93 Difference]: Finished difference Result 275 states and 329 transitions. [2022-04-06 23:20:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:20:01,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 94 [2022-04-06 23:20:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:20:01,466 INFO L225 Difference]: With dead ends: 275 [2022-04-06 23:20:01,466 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 23:20:01,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=64, Invalid=207, Unknown=1, NotChecked=0, Total=272 [2022-04-06 23:20:01,466 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:20:01,467 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 302 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:20:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 23:20:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2022-04-06 23:20:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 159 states have (on average 1.150943396226415) internal successors, (183), 163 states have internal predecessors, (183), 48 states have call successors, (48), 31 states have call predecessors, (48), 30 states have return successors, (46), 43 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 23:20:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 277 transitions. [2022-04-06 23:20:01,487 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 277 transitions. Word has length 94 [2022-04-06 23:20:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:20:01,487 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 277 transitions. [2022-04-06 23:20:01,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 23:20:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 277 transitions. [2022-04-06 23:20:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 23:20:01,488 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:20:01,488 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:20:01,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 23:20:01,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:20:01,707 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:20:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:20:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash 18113303, now seen corresponding path program 9 times [2022-04-06 23:20:01,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:20:01,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1916670803] [2022-04-06 23:20:01,710 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:20:01,711 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:20:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash 18113303, now seen corresponding path program 10 times [2022-04-06 23:20:01,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:20:01,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098745891] [2022-04-06 23:20:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:20:01,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:20:01,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:20:01,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600827476] [2022-04-06 23:20:01,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:20:01,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:20:01,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:20:01,718 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) [2022-04-06 23:20:01,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 23:20:01,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:20:01,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:20:01,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 23:20:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:20:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 98 proven. 53 refuted. 8 times theorem prover too weak. 265 trivial. 0 not checked. [2022-04-06 23:20:28,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:21:04,150 WARN L232 SmtUtils]: Spent 9.35s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:21:37,335 WARN L232 SmtUtils]: Spent 6.59s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:21:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 101 proven. 31 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-04-06 23:21:52,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:21:52,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098745891] [2022-04-06 23:21:52,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:21:52,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600827476] [2022-04-06 23:21:52,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600827476] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:21:52,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:21:52,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-04-06 23:21:52,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:21:52,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1916670803] [2022-04-06 23:21:52,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1916670803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:21:52,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:21:52,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 23:21:52,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821234099] [2022-04-06 23:21:52,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:21:52,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 23:21:52,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:21:52,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 23:21:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=295, Unknown=6, NotChecked=0, Total=380 [2022-04-06 23:21:52,951 INFO L87 Difference]: Start difference. First operand 238 states and 277 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 23:22:06,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:21,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:23,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:24,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:32,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:33,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:35,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:38,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:42,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:44,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:46,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:49,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 23:22:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:22:50,596 INFO L93 Difference]: Finished difference Result 271 states and 325 transitions. [2022-04-06 23:22:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 23:22:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2022-04-06 23:22:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:22:50,598 INFO L225 Difference]: With dead ends: 271 [2022-04-06 23:22:50,598 INFO L226 Difference]: Without dead ends: 269 [2022-04-06 23:22:50,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 80.3s TimeCoverageRelationStatistics Valid=144, Invalid=493, Unknown=13, NotChecked=0, Total=650 [2022-04-06 23:22:50,599 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 45 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 24 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 27.9s IncrementalHoareTripleChecker+Time [2022-04-06 23:22:50,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 243 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 299 Invalid, 9 Unknown, 103 Unchecked, 27.9s Time] [2022-04-06 23:22:50,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-04-06 23:22:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 258. [2022-04-06 23:22:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 171 states have (on average 1.1578947368421053) internal successors, (198), 177 states have internal predecessors, (198), 54 states have call successors, (54), 33 states have call predecessors, (54), 32 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 23:22:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 304 transitions. [2022-04-06 23:22:50,626 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 304 transitions. Word has length 99 [2022-04-06 23:22:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:22:50,626 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 304 transitions. [2022-04-06 23:22:50,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 23:22:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 304 transitions. [2022-04-06 23:22:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 23:22:50,628 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:22:50,628 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:22:50,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 23:22:50,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:50,848 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:22:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:22:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1358295611, now seen corresponding path program 5 times [2022-04-06 23:22:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:50,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [613193583] [2022-04-06 23:22:50,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:22:50,851 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:22:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1358295611, now seen corresponding path program 6 times [2022-04-06 23:22:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:22:50,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067707913] [2022-04-06 23:22:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:22:50,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:22:50,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:22:50,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745909061] [2022-04-06 23:22:50,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:22:50,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:50,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:22:50,857 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) [2022-04-06 23:22:50,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 23:22:50,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:22:50,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:22:50,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 23:22:50,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:22:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 108 proven. 4 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-04-06 23:22:51,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:22:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-04-06 23:22:51,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:22:51,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067707913] [2022-04-06 23:22:51,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:22:51,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745909061] [2022-04-06 23:22:51,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745909061] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:22:51,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:22:51,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 23:22:51,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:22:51,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [613193583] [2022-04-06 23:22:51,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [613193583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:22:51,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:22:51,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 23:22:51,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577207507] [2022-04-06 23:22:51,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:22:51,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 23:22:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 23:22:51,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:22:51,296 INFO L87 Difference]: Start difference. First operand 258 states and 304 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 23:22:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:22:51,473 INFO L93 Difference]: Finished difference Result 275 states and 320 transitions. [2022-04-06 23:22:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:22:51,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 105 [2022-04-06 23:22:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:22:51,475 INFO L225 Difference]: With dead ends: 275 [2022-04-06 23:22:51,475 INFO L226 Difference]: Without dead ends: 270 [2022-04-06 23:22:51,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:22:51,476 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:22:51,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 109 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:22:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-04-06 23:22:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 253. [2022-04-06 23:22:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 169 states have (on average 1.1183431952662721) internal successors, (189), 175 states have internal predecessors, (189), 49 states have call successors, (49), 35 states have call predecessors, (49), 34 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-04-06 23:22:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 285 transitions. [2022-04-06 23:22:51,502 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 285 transitions. Word has length 105 [2022-04-06 23:22:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:22:51,502 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 285 transitions. [2022-04-06 23:22:51,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 23:22:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 285 transitions. [2022-04-06 23:22:51,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 23:22:51,503 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:22:51,503 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:22:51,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 23:22:51,711 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,SelfDestructingSolverStorable23 [2022-04-06 23:22:51,712 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:22:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:22:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1894816690, now seen corresponding path program 7 times [2022-04-06 23:22:51,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:51,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1808121510] [2022-04-06 23:22:51,716 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:22:51,716 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:22:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1894816690, now seen corresponding path program 8 times [2022-04-06 23:22:51,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:22:51,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870897055] [2022-04-06 23:22:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:22:51,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:22:51,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:22:51,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974150378] [2022-04-06 23:22:51,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:22:51,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:51,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:22:51,726 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) [2022-04-06 23:22:51,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 23:22:51,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:22:51,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:22:51,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 23:22:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:22:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 23:22:51,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:22:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 23:22:52,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:22:52,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870897055] [2022-04-06 23:22:52,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:22:52,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974150378] [2022-04-06 23:22:52,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974150378] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:22:52,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:22:52,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 23:22:52,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:22:52,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1808121510] [2022-04-06 23:22:52,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1808121510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:22:52,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:22:52,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 23:22:52,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521286812] [2022-04-06 23:22:52,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:22:52,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 23:22:52,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:52,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 23:22:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:22:52,160 INFO L87 Difference]: Start difference. First operand 253 states and 285 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 23:22:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:22:52,301 INFO L93 Difference]: Finished difference Result 329 states and 371 transitions. [2022-04-06 23:22:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 23:22:52,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 108 [2022-04-06 23:22:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:22:52,312 INFO L225 Difference]: With dead ends: 329 [2022-04-06 23:22:52,312 INFO L226 Difference]: Without dead ends: 316 [2022-04-06 23:22:52,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=253, Unknown=0, NotChecked=0, Total=420 [2022-04-06 23:22:52,313 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:22:52,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 196 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:22:52,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-04-06 23:22:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2022-04-06 23:22:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 216 states have (on average 1.1111111111111112) internal successors, (240), 221 states have internal predecessors, (240), 56 states have call successors, (56), 43 states have call predecessors, (56), 42 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 23:22:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 350 transitions. [2022-04-06 23:22:52,362 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 350 transitions. Word has length 108 [2022-04-06 23:22:52,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:22:52,362 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 350 transitions. [2022-04-06 23:22:52,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 9 states have call successors, (18), 9 states have call predecessors, (18), 7 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 23:22:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 350 transitions. [2022-04-06 23:22:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 23:22:52,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:22:52,364 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:22:52,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 23:22:52,579 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,SelfDestructingSolverStorable24 [2022-04-06 23:22:52,579 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:22:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:22:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash 522560651, now seen corresponding path program 1 times [2022-04-06 23:22:52,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:52,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1511430434] [2022-04-06 23:22:52,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:22:52,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:22:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash 522560651, now seen corresponding path program 2 times [2022-04-06 23:22:52,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:22:52,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992825045] [2022-04-06 23:22:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:22:52,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:22:52,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:22:52,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614319700] [2022-04-06 23:22:52,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:22:52,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:52,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:22:52,590 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) [2022-04-06 23:22:52,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 23:22:52,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:22:52,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:22:52,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 23:22:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:22:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 150 proven. 430 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 23:22:52,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:22:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 34 proven. 70 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-04-06 23:22:53,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:22:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992825045] [2022-04-06 23:22:53,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:22:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614319700] [2022-04-06 23:22:53,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614319700] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:22:53,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:22:53,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 23:22:53,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:22:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1511430434] [2022-04-06 23:22:53,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1511430434] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:22:53,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:22:53,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 23:22:53,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377775891] [2022-04-06 23:22:53,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:22:53,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 23:22:53,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 23:22:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:22:53,056 INFO L87 Difference]: Start difference. First operand 315 states and 350 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 23:22:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:22:53,187 INFO L93 Difference]: Finished difference Result 368 states and 412 transitions. [2022-04-06 23:22:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 23:22:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2022-04-06 23:22:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:22:53,189 INFO L225 Difference]: With dead ends: 368 [2022-04-06 23:22:53,189 INFO L226 Difference]: Without dead ends: 313 [2022-04-06 23:22:53,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-04-06 23:22:53,190 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 26 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:22:53,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 174 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:22:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-04-06 23:22:53,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-04-06 23:22:53,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 214 states have (on average 1.1074766355140186) internal successors, (237), 219 states have internal predecessors, (237), 56 states have call successors, (56), 43 states have call predecessors, (56), 42 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 23:22:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 347 transitions. [2022-04-06 23:22:53,223 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 347 transitions. Word has length 118 [2022-04-06 23:22:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:22:53,224 INFO L478 AbstractCegarLoop]: Abstraction has 313 states and 347 transitions. [2022-04-06 23:22:53,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 23:22:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 347 transitions. [2022-04-06 23:22:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 23:22:53,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:22:53,225 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:22:53,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 23:22:53,439 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,SelfDestructingSolverStorable25 [2022-04-06 23:22:53,439 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:22:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:22:53,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1632097758, now seen corresponding path program 9 times [2022-04-06 23:22:53,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:53,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693801878] [2022-04-06 23:22:53,443 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:22:53,443 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:22:53,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1632097758, now seen corresponding path program 10 times [2022-04-06 23:22:53,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:22:53,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295275872] [2022-04-06 23:22:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:22:53,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:22:53,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:22:53,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490609276] [2022-04-06 23:22:53,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:22:53,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:53,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:22:53,452 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) [2022-04-06 23:22:53,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 23:22:53,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:22:53,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:22:53,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 23:22:53,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:22:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 34 proven. 554 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 23:22:53,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:22:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 34 proven. 62 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 23:22:54,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:22:54,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295275872] [2022-04-06 23:22:54,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:22:54,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490609276] [2022-04-06 23:22:54,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490609276] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:22:54,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:22:54,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-06 23:22:54,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:22:54,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693801878] [2022-04-06 23:22:54,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693801878] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:22:54,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:22:54,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:22:54,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978058678] [2022-04-06 23:22:54,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:22:54,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:22:54,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:54,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:22:54,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-06 23:22:54,089 INFO L87 Difference]: Start difference. First operand 313 states and 347 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (20), 10 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 23:22:54,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:22:54,291 INFO L93 Difference]: Finished difference Result 407 states and 461 transitions. [2022-04-06 23:22:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 23:22:54,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (20), 10 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 122 [2022-04-06 23:22:54,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:22:54,295 INFO L225 Difference]: With dead ends: 407 [2022-04-06 23:22:54,295 INFO L226 Difference]: Without dead ends: 394 [2022-04-06 23:22:54,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:22:54,297 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 70 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:22:54,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 211 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:22:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-04-06 23:22:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 393. [2022-04-06 23:22:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 270 states have (on average 1.1074074074074074) internal successors, (299), 276 states have internal predecessors, (299), 71 states have call successors, (71), 52 states have call predecessors, (71), 51 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-04-06 23:22:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 439 transitions. [2022-04-06 23:22:54,336 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 439 transitions. Word has length 122 [2022-04-06 23:22:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:22:54,336 INFO L478 AbstractCegarLoop]: Abstraction has 393 states and 439 transitions. [2022-04-06 23:22:54,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (20), 10 states have call predecessors, (20), 8 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 23:22:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 439 transitions. [2022-04-06 23:22:54,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-04-06 23:22:54,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:22:54,338 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 7, 6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:22:54,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 23:22:54,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:54,551 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:22:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:22:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash -867526735, now seen corresponding path program 3 times [2022-04-06 23:22:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:54,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [984420495] [2022-04-06 23:22:54,554 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:22:54,555 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:22:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash -867526735, now seen corresponding path program 4 times [2022-04-06 23:22:54,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:22:54,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055681224] [2022-04-06 23:22:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:22:54,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:22:54,562 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:22:54,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261188488] [2022-04-06 23:22:54,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:22:54,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:54,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:22:54,565 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) [2022-04-06 23:22:54,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 23:22:54,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:22:54,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:22:54,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 23:22:54,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:22:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 180 proven. 642 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-04-06 23:22:54,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:22:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 40 proven. 102 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2022-04-06 23:22:55,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:22:55,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055681224] [2022-04-06 23:22:55,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:22:55,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261188488] [2022-04-06 23:22:55,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261188488] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:22:55,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:22:55,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-06 23:22:55,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:22:55,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [984420495] [2022-04-06 23:22:55,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [984420495] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:22:55,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:22:55,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 23:22:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074809979] [2022-04-06 23:22:55,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:22:55,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 23:22:55,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:55,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 23:22:55,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:22:55,130 INFO L87 Difference]: Start difference. First operand 393 states and 439 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 9 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 23:22:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:22:55,289 INFO L93 Difference]: Finished difference Result 446 states and 501 transitions. [2022-04-06 23:22:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 23:22:55,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 9 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 136 [2022-04-06 23:22:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:22:55,291 INFO L225 Difference]: With dead ends: 446 [2022-04-06 23:22:55,291 INFO L226 Difference]: Without dead ends: 391 [2022-04-06 23:22:55,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:22:55,292 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 30 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:22:55,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 234 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:22:55,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-04-06 23:22:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2022-04-06 23:22:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 268 states have (on average 1.1044776119402986) internal successors, (296), 274 states have internal predecessors, (296), 71 states have call successors, (71), 52 states have call predecessors, (71), 51 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-04-06 23:22:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 436 transitions. [2022-04-06 23:22:55,331 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 436 transitions. Word has length 136 [2022-04-06 23:22:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:22:55,331 INFO L478 AbstractCegarLoop]: Abstraction has 391 states and 436 transitions. [2022-04-06 23:22:55,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 9 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 23:22:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 436 transitions. [2022-04-06 23:22:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-04-06 23:22:55,332 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:22:55,333 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:22:55,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 23:22:55,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 23:22:55,547 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:22:55,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:22:55,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1792552182, now seen corresponding path program 11 times [2022-04-06 23:22:55,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:55,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1503634158] [2022-04-06 23:22:55,550 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:22:55,550 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:22:55,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1792552182, now seen corresponding path program 12 times [2022-04-06 23:22:55,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:22:55,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041126215] [2022-04-06 23:22:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:22:55,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:22:55,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:22:55,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389594452] [2022-04-06 23:22:55,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:22:55,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:55,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:22:55,558 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) [2022-04-06 23:22:55,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 23:22:55,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 23:22:55,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:22:55,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 23:22:55,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:22:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 38 proven. 716 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 23:22:55,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:22:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 38 proven. 88 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-04-06 23:22:56,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:22:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041126215] [2022-04-06 23:22:56,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:22:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389594452] [2022-04-06 23:22:56,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389594452] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:22:56,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:22:56,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-04-06 23:22:56,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:22:56,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1503634158] [2022-04-06 23:22:56,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1503634158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:22:56,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:22:56,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 23:22:56,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430334389] [2022-04-06 23:22:56,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:22:56,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 23:22:56,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:56,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 23:22:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-04-06 23:22:56,200 INFO L87 Difference]: Start difference. First operand 391 states and 436 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 11 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2022-04-06 23:22:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:22:56,402 INFO L93 Difference]: Finished difference Result 487 states and 554 transitions. [2022-04-06 23:22:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 23:22:56,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 11 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) Word has length 136 [2022-04-06 23:22:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:22:56,405 INFO L225 Difference]: With dead ends: 487 [2022-04-06 23:22:56,405 INFO L226 Difference]: Without dead ends: 474 [2022-04-06 23:22:56,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2022-04-06 23:22:56,406 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 74 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:22:56,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 260 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:22:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-04-06 23:22:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 473. [2022-04-06 23:22:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 324 states have (on average 1.1049382716049383) internal successors, (358), 332 states have internal predecessors, (358), 88 states have call successors, (88), 61 states have call predecessors, (88), 60 states have return successors, (86), 79 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-06 23:22:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 532 transitions. [2022-04-06 23:22:56,451 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 532 transitions. Word has length 136 [2022-04-06 23:22:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:22:56,451 INFO L478 AbstractCegarLoop]: Abstraction has 473 states and 532 transitions. [2022-04-06 23:22:56,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 11 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2022-04-06 23:22:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 532 transitions. [2022-04-06 23:22:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-04-06 23:22:56,453 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:22:56,453 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 7, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:22:56,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 23:22:56,665 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,SelfDestructingSolverStorable28 [2022-04-06 23:22:56,666 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:22:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:22:56,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1618957110, now seen corresponding path program 13 times [2022-04-06 23:22:56,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:56,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012393719] [2022-04-06 23:22:56,668 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:22:56,668 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:22:56,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1618957110, now seen corresponding path program 14 times [2022-04-06 23:22:56,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:22:56,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742058531] [2022-04-06 23:22:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:22:56,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:22:56,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:22:56,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187352447] [2022-04-06 23:22:56,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:22:56,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:56,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:22:56,675 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) [2022-04-06 23:22:56,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 23:22:56,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:22:56,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:22:56,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 23:22:56,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:22:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 42 proven. 900 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 23:22:57,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:22:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 23:22:57,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:22:57,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742058531] [2022-04-06 23:22:57,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:22:57,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187352447] [2022-04-06 23:22:57,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187352447] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:22:57,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:22:57,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-04-06 23:22:57,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:22:57,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012393719] [2022-04-06 23:22:57,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012393719] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:22:57,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:22:57,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 23:22:57,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080655327] [2022-04-06 23:22:57,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:22:57,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 23:22:57,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 23:22:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:22:57,346 INFO L87 Difference]: Start difference. First operand 473 states and 532 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (24), 12 states have call predecessors, (24), 10 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-04-06 23:22:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:22:57,595 INFO L93 Difference]: Finished difference Result 579 states and 663 transitions. [2022-04-06 23:22:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 23:22:57,596 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (24), 12 states have call predecessors, (24), 10 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 150 [2022-04-06 23:22:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:22:57,598 INFO L225 Difference]: With dead ends: 579 [2022-04-06 23:22:57,598 INFO L226 Difference]: Without dead ends: 566 [2022-04-06 23:22:57,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=356, Invalid=514, Unknown=0, NotChecked=0, Total=870 [2022-04-06 23:22:57,599 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 85 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:22:57,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 279 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:22:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-04-06 23:22:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 565. [2022-04-06 23:22:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 387 states have (on average 1.1059431524547803) internal successors, (428), 397 states have internal predecessors, (428), 107 states have call successors, (107), 71 states have call predecessors, (107), 70 states have return successors, (105), 96 states have call predecessors, (105), 105 states have call successors, (105) [2022-04-06 23:22:57,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 640 transitions. [2022-04-06 23:22:57,656 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 640 transitions. Word has length 150 [2022-04-06 23:22:57,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:22:57,657 INFO L478 AbstractCegarLoop]: Abstraction has 565 states and 640 transitions. [2022-04-06 23:22:57,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (24), 12 states have call predecessors, (24), 10 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-04-06 23:22:57,657 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 640 transitions. [2022-04-06 23:22:57,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-04-06 23:22:57,659 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:22:57,659 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 8, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:22:57,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 23:22:57,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:57,869 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:22:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:22:57,870 INFO L85 PathProgramCache]: Analyzing trace with hash 778901090, now seen corresponding path program 15 times [2022-04-06 23:22:57,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:22:57,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [489375558] [2022-04-06 23:22:57,872 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:22:57,872 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:22:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash 778901090, now seen corresponding path program 16 times [2022-04-06 23:22:57,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:22:57,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896724348] [2022-04-06 23:22:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:22:57,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:22:57,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:22:57,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115057683] [2022-04-06 23:22:57,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:22:57,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:22:57,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:22:57,879 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) [2022-04-06 23:22:57,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 23:23:05,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:23:05,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:05,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 23:23:05,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 46 proven. 1106 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 23:23:05,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 46 proven. 158 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-04-06 23:23:05,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:05,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896724348] [2022-04-06 23:23:05,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:05,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115057683] [2022-04-06 23:23:05,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115057683] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:05,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:05,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-06 23:23:05,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:05,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [489375558] [2022-04-06 23:23:05,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [489375558] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:05,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:05,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 23:23:05,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460292838] [2022-04-06 23:23:05,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:05,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 23:23:05,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 23:23:05,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:23:05,755 INFO L87 Difference]: Start difference. First operand 565 states and 640 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 13 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-04-06 23:23:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:06,055 INFO L93 Difference]: Finished difference Result 677 states and 778 transitions. [2022-04-06 23:23:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 23:23:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 13 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 164 [2022-04-06 23:23:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:06,059 INFO L225 Difference]: With dead ends: 677 [2022-04-06 23:23:06,059 INFO L226 Difference]: Without dead ends: 664 [2022-04-06 23:23:06,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=554, Unknown=0, NotChecked=0, Total=930 [2022-04-06 23:23:06,059 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 113 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:06,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 279 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:23:06,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-04-06 23:23:06,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 663. [2022-04-06 23:23:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 453 states have (on average 1.1059602649006623) internal successors, (501), 466 states have internal predecessors, (501), 128 states have call successors, (128), 82 states have call predecessors, (128), 81 states have return successors, (126), 114 states have call predecessors, (126), 126 states have call successors, (126) [2022-04-06 23:23:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 755 transitions. [2022-04-06 23:23:06,121 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 755 transitions. Word has length 164 [2022-04-06 23:23:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:06,121 INFO L478 AbstractCegarLoop]: Abstraction has 663 states and 755 transitions. [2022-04-06 23:23:06,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 13 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-04-06 23:23:06,122 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 755 transitions. [2022-04-06 23:23:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-04-06 23:23:06,123 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:06,123 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 9, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:06,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 23:23:06,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:06,332 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:06,332 INFO L85 PathProgramCache]: Analyzing trace with hash 759159950, now seen corresponding path program 17 times [2022-04-06 23:23:06,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:06,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [579175501] [2022-04-06 23:23:06,334 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:06,335 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:06,335 INFO L85 PathProgramCache]: Analyzing trace with hash 759159950, now seen corresponding path program 18 times [2022-04-06 23:23:06,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:06,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253627880] [2022-04-06 23:23:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:06,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:06,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:06,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461728705] [2022-04-06 23:23:06,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:23:06,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:06,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:06,342 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) [2022-04-06 23:23:06,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 23:23:06,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 23:23:06,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:06,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 23:23:06,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 723 proven. 34 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2022-04-06 23:23:06,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:07,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 149 proven. 28 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2022-04-06 23:23:07,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:07,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253627880] [2022-04-06 23:23:07,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:07,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461728705] [2022-04-06 23:23:07,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461728705] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:07,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:07,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-04-06 23:23:07,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:07,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [579175501] [2022-04-06 23:23:07,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [579175501] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:07,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:07,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:23:07,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124687456] [2022-04-06 23:23:07,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:07,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:23:07,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:07,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:23:07,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 23:23:07,124 INFO L87 Difference]: Start difference. First operand 663 states and 755 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 23:23:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:07,247 INFO L93 Difference]: Finished difference Result 719 states and 820 transitions. [2022-04-06 23:23:07,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:23:07,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 178 [2022-04-06 23:23:07,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:07,250 INFO L225 Difference]: With dead ends: 719 [2022-04-06 23:23:07,250 INFO L226 Difference]: Without dead ends: 565 [2022-04-06 23:23:07,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 23:23:07,251 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:07,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 182 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:23:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-04-06 23:23:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2022-04-06 23:23:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 384 states have (on average 1.1041666666666667) internal successors, (424), 396 states have internal predecessors, (424), 110 states have call successors, (110), 71 states have call predecessors, (110), 70 states have return successors, (108), 97 states have call predecessors, (108), 108 states have call successors, (108) [2022-04-06 23:23:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 642 transitions. [2022-04-06 23:23:07,323 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 642 transitions. Word has length 178 [2022-04-06 23:23:07,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:07,323 INFO L478 AbstractCegarLoop]: Abstraction has 565 states and 642 transitions. [2022-04-06 23:23:07,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 23:23:07,324 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 642 transitions. [2022-04-06 23:23:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-04-06 23:23:07,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:07,325 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 8, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:07,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 23:23:07,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:07,539 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:07,540 INFO L85 PathProgramCache]: Analyzing trace with hash 221596463, now seen corresponding path program 5 times [2022-04-06 23:23:07,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:07,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [230180032] [2022-04-06 23:23:07,543 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:07,543 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:07,543 INFO L85 PathProgramCache]: Analyzing trace with hash 221596463, now seen corresponding path program 6 times [2022-04-06 23:23:07,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:07,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273449551] [2022-04-06 23:23:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:07,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:07,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:07,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148225696] [2022-04-06 23:23:07,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:23:07,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:07,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:07,552 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) [2022-04-06 23:23:07,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 23:23:07,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 23:23:07,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:07,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 23:23:07,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2022-04-06 23:23:07,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:23:07,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:07,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273449551] [2022-04-06 23:23:07,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:07,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148225696] [2022-04-06 23:23:07,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148225696] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:07,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:07,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:23:07,855 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:07,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [230180032] [2022-04-06 23:23:07,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [230180032] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:07,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:07,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:23:07,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422298246] [2022-04-06 23:23:07,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:07,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:23:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:23:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:23:07,857 INFO L87 Difference]: Start difference. First operand 565 states and 642 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 23:23:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:07,940 INFO L93 Difference]: Finished difference Result 640 states and 720 transitions. [2022-04-06 23:23:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:23:07,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 182 [2022-04-06 23:23:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:07,943 INFO L225 Difference]: With dead ends: 640 [2022-04-06 23:23:07,943 INFO L226 Difference]: Without dead ends: 527 [2022-04-06 23:23:07,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:23:07,944 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:07,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:23:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-04-06 23:23:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 525. [2022-04-06 23:23:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 356 states have (on average 1.0898876404494382) internal successors, (388), 366 states have internal predecessors, (388), 102 states have call successors, (102), 68 states have call predecessors, (102), 66 states have return successors, (99), 90 states have call predecessors, (99), 99 states have call successors, (99) [2022-04-06 23:23:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 589 transitions. [2022-04-06 23:23:08,017 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 589 transitions. Word has length 182 [2022-04-06 23:23:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:08,018 INFO L478 AbstractCegarLoop]: Abstraction has 525 states and 589 transitions. [2022-04-06 23:23:08,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 23:23:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 589 transitions. [2022-04-06 23:23:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-04-06 23:23:08,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:08,019 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:08,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 23:23:08,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:08,220 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:08,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:08,220 INFO L85 PathProgramCache]: Analyzing trace with hash -553486584, now seen corresponding path program 19 times [2022-04-06 23:23:08,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:08,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1249265754] [2022-04-06 23:23:08,223 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:08,223 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:08,223 INFO L85 PathProgramCache]: Analyzing trace with hash -553486584, now seen corresponding path program 20 times [2022-04-06 23:23:08,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:08,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031245740] [2022-04-06 23:23:08,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:08,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:08,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:08,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240663834] [2022-04-06 23:23:08,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:23:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:08,231 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) [2022-04-06 23:23:08,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 23:23:08,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:23:08,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:08,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 23:23:08,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 52 proven. 1400 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 23:23:08,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 52 proven. 176 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-04-06 23:23:09,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:09,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031245740] [2022-04-06 23:23:09,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:09,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240663834] [2022-04-06 23:23:09,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240663834] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:09,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:09,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2022-04-06 23:23:09,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:09,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1249265754] [2022-04-06 23:23:09,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1249265754] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:09,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:09,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 23:23:09,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935437172] [2022-04-06 23:23:09,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:09,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 23:23:09,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:09,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 23:23:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:23:09,081 INFO L87 Difference]: Start difference. First operand 525 states and 589 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 14 states have call successors, (29), 14 states have call predecessors, (29), 12 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2022-04-06 23:23:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:09,455 INFO L93 Difference]: Finished difference Result 619 states and 701 transitions. [2022-04-06 23:23:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 23:23:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 14 states have call successors, (29), 14 states have call predecessors, (29), 12 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) Word has length 182 [2022-04-06 23:23:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:09,458 INFO L225 Difference]: With dead ends: 619 [2022-04-06 23:23:09,458 INFO L226 Difference]: Without dead ends: 596 [2022-04-06 23:23:09,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=369, Invalid=561, Unknown=0, NotChecked=0, Total=930 [2022-04-06 23:23:09,459 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 121 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:09,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 303 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:23:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-04-06 23:23:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 595. [2022-04-06 23:23:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 403 states have (on average 1.0893300248138957) internal successors, (439), 415 states have internal predecessors, (439), 117 states have call successors, (117), 76 states have call predecessors, (117), 74 states have return successors, (114), 103 states have call predecessors, (114), 114 states have call successors, (114) [2022-04-06 23:23:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 670 transitions. [2022-04-06 23:23:09,540 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 670 transitions. Word has length 182 [2022-04-06 23:23:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:09,540 INFO L478 AbstractCegarLoop]: Abstraction has 595 states and 670 transitions. [2022-04-06 23:23:09,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 14 states have internal predecessors, (81), 14 states have call successors, (29), 14 states have call predecessors, (29), 12 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2022-04-06 23:23:09,540 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 670 transitions. [2022-04-06 23:23:09,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-04-06 23:23:09,542 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:09,542 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:09,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 23:23:09,742 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,SelfDestructingSolverStorable33 [2022-04-06 23:23:09,742 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:09,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1093935796, now seen corresponding path program 21 times [2022-04-06 23:23:09,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:09,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2014585381] [2022-04-06 23:23:09,746 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:09,746 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:09,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1093935796, now seen corresponding path program 22 times [2022-04-06 23:23:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:09,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128316792] [2022-04-06 23:23:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:09,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:09,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621079058] [2022-04-06 23:23:09,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:23:09,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:09,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:09,755 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) [2022-04-06 23:23:09,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 23:23:16,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:23:16,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:16,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 23:23:16,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 56 proven. 1652 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-04-06 23:23:17,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 56 proven. 220 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-04-06 23:23:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128316792] [2022-04-06 23:23:17,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621079058] [2022-04-06 23:23:17,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621079058] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:17,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:17,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2022-04-06 23:23:17,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2014585381] [2022-04-06 23:23:17,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2014585381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:17,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:17,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 23:23:17,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610138662] [2022-04-06 23:23:17,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:17,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 23:23:17,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 23:23:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:23:17,653 INFO L87 Difference]: Start difference. First operand 595 states and 670 transitions. Second operand has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (31), 15 states have call predecessors, (31), 13 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2022-04-06 23:23:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:17,996 INFO L93 Difference]: Finished difference Result 689 states and 782 transitions. [2022-04-06 23:23:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 23:23:17,997 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (31), 15 states have call predecessors, (31), 13 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) Word has length 196 [2022-04-06 23:23:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:17,999 INFO L225 Difference]: With dead ends: 689 [2022-04-06 23:23:17,999 INFO L226 Difference]: Without dead ends: 666 [2022-04-06 23:23:17,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 368 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=388, Invalid=604, Unknown=0, NotChecked=0, Total=992 [2022-04-06 23:23:18,000 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 137 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:18,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 327 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:23:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-04-06 23:23:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 665. [2022-04-06 23:23:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 450 states have (on average 1.0888888888888888) internal successors, (490), 464 states have internal predecessors, (490), 132 states have call successors, (132), 84 states have call predecessors, (132), 82 states have return successors, (129), 116 states have call predecessors, (129), 129 states have call successors, (129) [2022-04-06 23:23:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 751 transitions. [2022-04-06 23:23:18,076 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 751 transitions. Word has length 196 [2022-04-06 23:23:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:18,076 INFO L478 AbstractCegarLoop]: Abstraction has 665 states and 751 transitions. [2022-04-06 23:23:18,076 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5) internal successors, (88), 15 states have internal predecessors, (88), 15 states have call successors, (31), 15 states have call predecessors, (31), 13 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2022-04-06 23:23:18,076 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 751 transitions. [2022-04-06 23:23:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-04-06 23:23:18,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:18,083 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:18,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 23:23:18,292 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:18,292 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:18,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1762259296, now seen corresponding path program 23 times [2022-04-06 23:23:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [285645007] [2022-04-06 23:23:18,294 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:18,294 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1762259296, now seen corresponding path program 24 times [2022-04-06 23:23:18,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:18,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33642981] [2022-04-06 23:23:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:18,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:18,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:18,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653215045] [2022-04-06 23:23:18,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:23:18,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:18,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:18,302 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) [2022-04-06 23:23:18,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 23:23:18,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 23:23:18,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:18,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 23:23:18,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 966 proven. 69 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-04-06 23:23:18,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 186 proven. 69 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2022-04-06 23:23:19,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:19,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33642981] [2022-04-06 23:23:19,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:19,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653215045] [2022-04-06 23:23:19,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653215045] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:19,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:19,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 23:23:19,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:19,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [285645007] [2022-04-06 23:23:19,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [285645007] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:19,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:19,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:23:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688044331] [2022-04-06 23:23:19,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:19,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:23:19,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:23:19,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 23:23:19,155 INFO L87 Difference]: Start difference. First operand 665 states and 751 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-04-06 23:23:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:19,297 INFO L93 Difference]: Finished difference Result 781 states and 891 transitions. [2022-04-06 23:23:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:23:19,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 210 [2022-04-06 23:23:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:19,300 INFO L225 Difference]: With dead ends: 781 [2022-04-06 23:23:19,300 INFO L226 Difference]: Without dead ends: 613 [2022-04-06 23:23:19,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 410 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 23:23:19,301 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 2 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:19,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 266 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:23:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-04-06 23:23:19,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 613. [2022-04-06 23:23:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 415 states have (on average 1.0867469879518072) internal successors, (451), 427 states have internal predecessors, (451), 120 states have call successors, (120), 79 states have call predecessors, (120), 77 states have return successors, (117), 106 states have call predecessors, (117), 117 states have call successors, (117) [2022-04-06 23:23:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 688 transitions. [2022-04-06 23:23:19,360 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 688 transitions. Word has length 210 [2022-04-06 23:23:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:19,360 INFO L478 AbstractCegarLoop]: Abstraction has 613 states and 688 transitions. [2022-04-06 23:23:19,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 6 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-04-06 23:23:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 688 transitions. [2022-04-06 23:23:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-04-06 23:23:19,362 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:19,362 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 31, 9, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:19,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 23:23:19,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:19,563 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:19,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:19,563 INFO L85 PathProgramCache]: Analyzing trace with hash -567448742, now seen corresponding path program 25 times [2022-04-06 23:23:19,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:19,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306718062] [2022-04-06 23:23:19,565 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:19,565 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:19,565 INFO L85 PathProgramCache]: Analyzing trace with hash -567448742, now seen corresponding path program 26 times [2022-04-06 23:23:19,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:19,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132464873] [2022-04-06 23:23:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:19,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:19,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:19,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980859795] [2022-04-06 23:23:19,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:23:19,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:19,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:19,572 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) [2022-04-06 23:23:19,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 23:23:19,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:23:19,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:19,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 23:23:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 62 proven. 2012 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 23:23:20,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2166 backedges. 62 proven. 244 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-04-06 23:23:20,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:20,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132464873] [2022-04-06 23:23:20,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:20,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980859795] [2022-04-06 23:23:20,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980859795] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:20,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:20,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-04-06 23:23:20,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:20,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306718062] [2022-04-06 23:23:20,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306718062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:20,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:20,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 23:23:20,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956687710] [2022-04-06 23:23:20,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:20,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 23:23:20,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 23:23:20,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:23:20,409 INFO L87 Difference]: Start difference. First operand 613 states and 688 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (34), 16 states have call predecessors, (34), 14 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2022-04-06 23:23:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:20,754 INFO L93 Difference]: Finished difference Result 707 states and 800 transitions. [2022-04-06 23:23:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 23:23:20,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (34), 16 states have call predecessors, (34), 14 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) Word has length 214 [2022-04-06 23:23:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:20,757 INFO L225 Difference]: With dead ends: 707 [2022-04-06 23:23:20,757 INFO L226 Difference]: Without dead ends: 684 [2022-04-06 23:23:20,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=380, Invalid=612, Unknown=0, NotChecked=0, Total=992 [2022-04-06 23:23:20,758 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 148 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:20,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 343 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:23:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-04-06 23:23:20,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 683. [2022-04-06 23:23:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 462 states have (on average 1.0865800865800865) internal successors, (502), 476 states have internal predecessors, (502), 135 states have call successors, (135), 87 states have call predecessors, (135), 85 states have return successors, (132), 119 states have call predecessors, (132), 132 states have call successors, (132) [2022-04-06 23:23:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 769 transitions. [2022-04-06 23:23:20,846 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 769 transitions. Word has length 214 [2022-04-06 23:23:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:20,846 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 769 transitions. [2022-04-06 23:23:20,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 16 states have call successors, (34), 16 states have call predecessors, (34), 14 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2022-04-06 23:23:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 769 transitions. [2022-04-06 23:23:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-04-06 23:23:20,848 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:20,848 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 10, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:20,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 23:23:21,063 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,SelfDestructingSolverStorable36 [2022-04-06 23:23:21,063 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:21,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1483480966, now seen corresponding path program 27 times [2022-04-06 23:23:21,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:21,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1974657982] [2022-04-06 23:23:21,066 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:21,066 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:21,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1483480966, now seen corresponding path program 28 times [2022-04-06 23:23:21,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:21,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082612693] [2022-04-06 23:23:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:21,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:21,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:21,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811122880] [2022-04-06 23:23:21,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:23:21,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:21,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:21,074 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:23:21,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 23:23:22,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:23:22,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:22,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 23:23:22,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2472 backedges. 66 proven. 2310 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 23:23:22,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2472 backedges. 66 proven. 294 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-04-06 23:23:22,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082612693] [2022-04-06 23:23:22,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811122880] [2022-04-06 23:23:22,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811122880] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:22,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:22,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 24 [2022-04-06 23:23:22,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:22,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1974657982] [2022-04-06 23:23:22,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1974657982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:22,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:22,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 23:23:22,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847640846] [2022-04-06 23:23:22,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:22,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 23:23:22,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:22,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 23:23:22,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:23:22,974 INFO L87 Difference]: Start difference. First operand 683 states and 769 transitions. Second operand has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 17 states have internal predecessors, (101), 17 states have call successors, (36), 17 states have call predecessors, (36), 15 states have return successors, (34), 15 states have call predecessors, (34), 15 states have call successors, (34) [2022-04-06 23:23:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:23,364 INFO L93 Difference]: Finished difference Result 777 states and 881 transitions. [2022-04-06 23:23:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 23:23:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 17 states have internal predecessors, (101), 17 states have call successors, (36), 17 states have call predecessors, (36), 15 states have return successors, (34), 15 states have call predecessors, (34), 15 states have call successors, (34) Word has length 228 [2022-04-06 23:23:23,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:23,372 INFO L225 Difference]: With dead ends: 777 [2022-04-06 23:23:23,372 INFO L226 Difference]: Without dead ends: 754 [2022-04-06 23:23:23,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 432 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=658, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 23:23:23,373 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 164 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:23,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 364 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:23:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-04-06 23:23:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 753. [2022-04-06 23:23:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 509 states have (on average 1.0864440078585462) internal successors, (553), 525 states have internal predecessors, (553), 150 states have call successors, (150), 95 states have call predecessors, (150), 93 states have return successors, (147), 132 states have call predecessors, (147), 147 states have call successors, (147) [2022-04-06 23:23:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 850 transitions. [2022-04-06 23:23:23,449 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 850 transitions. Word has length 228 [2022-04-06 23:23:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:23,449 INFO L478 AbstractCegarLoop]: Abstraction has 753 states and 850 transitions. [2022-04-06 23:23:23,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 17 states have internal predecessors, (101), 17 states have call successors, (36), 17 states have call predecessors, (36), 15 states have return successors, (34), 15 states have call predecessors, (34), 15 states have call successors, (34) [2022-04-06 23:23:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 850 transitions. [2022-04-06 23:23:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-04-06 23:23:23,451 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:23,451 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 35, 11, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:23,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 23:23:23,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 23:23:23,659 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:23,659 INFO L85 PathProgramCache]: Analyzing trace with hash -963242318, now seen corresponding path program 29 times [2022-04-06 23:23:23,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:23,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [318204170] [2022-04-06 23:23:23,661 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:23,662 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:23,662 INFO L85 PathProgramCache]: Analyzing trace with hash -963242318, now seen corresponding path program 30 times [2022-04-06 23:23:23,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:23,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693147481] [2022-04-06 23:23:23,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:23,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:23,670 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:23,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960791170] [2022-04-06 23:23:23,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:23:23,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:23,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:23,687 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:23:23,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 23:23:23,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 23:23:23,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:23,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 23:23:23,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 1209 proven. 116 refuted. 0 times theorem prover too weak. 1475 trivial. 0 not checked. [2022-04-06 23:23:24,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 229 proven. 116 refuted. 0 times theorem prover too weak. 2455 trivial. 0 not checked. [2022-04-06 23:23:24,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:24,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693147481] [2022-04-06 23:23:24,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:24,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960791170] [2022-04-06 23:23:24,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960791170] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:24,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:24,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-04-06 23:23:24,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:24,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [318204170] [2022-04-06 23:23:24,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [318204170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:24,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:24,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:23:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173167728] [2022-04-06 23:23:24,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:24,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:23:24,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:23:24,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 23:23:24,805 INFO L87 Difference]: Start difference. First operand 753 states and 850 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 7 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-04-06 23:23:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:25,020 INFO L93 Difference]: Finished difference Result 881 states and 1008 transitions. [2022-04-06 23:23:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:23:25,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 7 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 242 [2022-04-06 23:23:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:25,024 INFO L225 Difference]: With dead ends: 881 [2022-04-06 23:23:25,024 INFO L226 Difference]: Without dead ends: 701 [2022-04-06 23:23:25,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 472 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 23:23:25,025 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:25,025 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 367 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:23:25,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-04-06 23:23:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 701. [2022-04-06 23:23:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 474 states have (on average 1.0843881856540085) internal successors, (514), 488 states have internal predecessors, (514), 138 states have call successors, (138), 90 states have call predecessors, (138), 88 states have return successors, (135), 122 states have call predecessors, (135), 135 states have call successors, (135) [2022-04-06 23:23:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 787 transitions. [2022-04-06 23:23:25,116 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 787 transitions. Word has length 242 [2022-04-06 23:23:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:25,116 INFO L478 AbstractCegarLoop]: Abstraction has 701 states and 787 transitions. [2022-04-06 23:23:25,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 7 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2022-04-06 23:23:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 787 transitions. [2022-04-06 23:23:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-04-06 23:23:25,119 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:25,119 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 10, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:25,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 23:23:25,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 23:23:25,340 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:25,341 INFO L85 PathProgramCache]: Analyzing trace with hash 405360684, now seen corresponding path program 31 times [2022-04-06 23:23:25,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:25,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089555947] [2022-04-06 23:23:25,343 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:25,343 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash 405360684, now seen corresponding path program 32 times [2022-04-06 23:23:25,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:25,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67864710] [2022-04-06 23:23:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:25,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:25,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:25,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383648930] [2022-04-06 23:23:25,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:23:25,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:25,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:25,354 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:23:25,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 23:23:25,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:23:25,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:25,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 23:23:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 72 proven. 2736 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 23:23:25,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 72 proven. 324 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-04-06 23:23:26,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:26,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67864710] [2022-04-06 23:23:26,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:26,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383648930] [2022-04-06 23:23:26,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383648930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:26,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:26,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 24 [2022-04-06 23:23:26,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:26,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089555947] [2022-04-06 23:23:26,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089555947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:26,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:26,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 23:23:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862788861] [2022-04-06 23:23:26,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:26,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 23:23:26,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 23:23:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:23:26,263 INFO L87 Difference]: Start difference. First operand 701 states and 787 transitions. Second operand has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 18 states have internal predecessors, (107), 18 states have call successors, (39), 18 states have call predecessors, (39), 16 states have return successors, (37), 16 states have call predecessors, (37), 16 states have call successors, (37) [2022-04-06 23:23:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:26,735 INFO L93 Difference]: Finished difference Result 795 states and 899 transitions. [2022-04-06 23:23:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 23:23:26,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 18 states have internal predecessors, (107), 18 states have call successors, (39), 18 states have call predecessors, (39), 16 states have return successors, (37), 16 states have call predecessors, (37), 16 states have call successors, (37) Word has length 246 [2022-04-06 23:23:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:26,738 INFO L225 Difference]: With dead ends: 795 [2022-04-06 23:23:26,738 INFO L226 Difference]: Without dead ends: 772 [2022-04-06 23:23:26,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 468 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=389, Invalid=667, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 23:23:26,739 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 191 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:26,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 365 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 23:23:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-04-06 23:23:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 771. [2022-04-06 23:23:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 521 states have (on average 1.0844529750479845) internal successors, (565), 537 states have internal predecessors, (565), 153 states have call successors, (153), 98 states have call predecessors, (153), 96 states have return successors, (150), 135 states have call predecessors, (150), 150 states have call successors, (150) [2022-04-06 23:23:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 868 transitions. [2022-04-06 23:23:26,821 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 868 transitions. Word has length 246 [2022-04-06 23:23:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:26,822 INFO L478 AbstractCegarLoop]: Abstraction has 771 states and 868 transitions. [2022-04-06 23:23:26,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 18 states have internal predecessors, (107), 18 states have call successors, (39), 18 states have call predecessors, (39), 16 states have return successors, (37), 16 states have call predecessors, (37), 16 states have call successors, (37) [2022-04-06 23:23:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 868 transitions. [2022-04-06 23:23:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-04-06 23:23:26,824 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:26,824 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 38, 11, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:26,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 23:23:27,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 23:23:27,039 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:27,040 INFO L85 PathProgramCache]: Analyzing trace with hash 533081304, now seen corresponding path program 33 times [2022-04-06 23:23:27,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:27,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1621321477] [2022-04-06 23:23:27,042 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:27,042 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:27,042 INFO L85 PathProgramCache]: Analyzing trace with hash 533081304, now seen corresponding path program 34 times [2022-04-06 23:23:27,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:27,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127905329] [2022-04-06 23:23:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:27,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:27,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361524458] [2022-04-06 23:23:27,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:23:27,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:27,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:27,049 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:23:27,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 23:23:33,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:23:33,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:33,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 23:23:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 76 proven. 3080 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:23:33,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3268 backedges. 76 proven. 380 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-04-06 23:23:33,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127905329] [2022-04-06 23:23:33,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361524458] [2022-04-06 23:23:33,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361524458] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:33,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:33,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 24 [2022-04-06 23:23:33,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:33,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1621321477] [2022-04-06 23:23:33,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1621321477] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:33,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:33,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 23:23:33,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467892667] [2022-04-06 23:23:33,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:33,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 23:23:33,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:33,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 23:23:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:23:33,957 INFO L87 Difference]: Start difference. First operand 771 states and 868 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 19 states have internal predecessors, (114), 19 states have call successors, (41), 19 states have call predecessors, (41), 17 states have return successors, (39), 17 states have call predecessors, (39), 17 states have call successors, (39) [2022-04-06 23:23:34,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:34,337 INFO L93 Difference]: Finished difference Result 865 states and 980 transitions. [2022-04-06 23:23:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 23:23:34,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 19 states have internal predecessors, (114), 19 states have call successors, (41), 19 states have call predecessors, (41), 17 states have return successors, (39), 17 states have call predecessors, (39), 17 states have call successors, (39) Word has length 260 [2022-04-06 23:23:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:34,340 INFO L225 Difference]: With dead ends: 865 [2022-04-06 23:23:34,340 INFO L226 Difference]: Without dead ends: 842 [2022-04-06 23:23:34,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 496 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 23:23:34,341 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 189 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:34,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 368 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:23:34,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-04-06 23:23:34,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 841. [2022-04-06 23:23:34,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 568 states have (on average 1.0845070422535212) internal successors, (616), 586 states have internal predecessors, (616), 168 states have call successors, (168), 106 states have call predecessors, (168), 104 states have return successors, (165), 148 states have call predecessors, (165), 165 states have call successors, (165) [2022-04-06 23:23:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 949 transitions. [2022-04-06 23:23:34,420 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 949 transitions. Word has length 260 [2022-04-06 23:23:34,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:34,420 INFO L478 AbstractCegarLoop]: Abstraction has 841 states and 949 transitions. [2022-04-06 23:23:34,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 19 states have internal predecessors, (114), 19 states have call successors, (41), 19 states have call predecessors, (41), 17 states have return successors, (39), 17 states have call predecessors, (39), 17 states have call successors, (39) [2022-04-06 23:23:34,421 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 949 transitions. [2022-04-06 23:23:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-04-06 23:23:34,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:34,428 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 40, 12, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:34,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 23:23:34,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:34,639 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1793233788, now seen corresponding path program 35 times [2022-04-06 23:23:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:34,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693146861] [2022-04-06 23:23:34,642 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:34,642 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1793233788, now seen corresponding path program 36 times [2022-04-06 23:23:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:34,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885279213] [2022-04-06 23:23:34,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:34,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:34,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:34,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634680523] [2022-04-06 23:23:34,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:23:34,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:34,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:34,651 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:23:34,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 23:23:34,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 23:23:34,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:34,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 23:23:34,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3642 backedges. 1452 proven. 175 refuted. 0 times theorem prover too weak. 2015 trivial. 0 not checked. [2022-04-06 23:23:35,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3642 backedges. 277 proven. 170 refuted. 0 times theorem prover too weak. 3195 trivial. 0 not checked. [2022-04-06 23:23:36,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:36,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885279213] [2022-04-06 23:23:36,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:36,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634680523] [2022-04-06 23:23:36,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634680523] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:36,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:36,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-04-06 23:23:36,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:36,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693146861] [2022-04-06 23:23:36,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693146861] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:36,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:36,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 23:23:36,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834947833] [2022-04-06 23:23:36,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:36,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 23:23:36,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:36,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 23:23:36,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-04-06 23:23:36,049 INFO L87 Difference]: Start difference. First operand 841 states and 949 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2022-04-06 23:23:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:36,275 INFO L93 Difference]: Finished difference Result 981 states and 1125 transitions. [2022-04-06 23:23:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:23:36,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) Word has length 274 [2022-04-06 23:23:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:36,279 INFO L225 Difference]: With dead ends: 981 [2022-04-06 23:23:36,279 INFO L226 Difference]: Without dead ends: 789 [2022-04-06 23:23:36,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 534 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-04-06 23:23:36,280 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 4 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:36,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 484 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:23:36,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-04-06 23:23:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 789. [2022-04-06 23:23:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 533 states have (on average 1.0825515947467168) internal successors, (577), 549 states have internal predecessors, (577), 156 states have call successors, (156), 101 states have call predecessors, (156), 99 states have return successors, (153), 138 states have call predecessors, (153), 153 states have call successors, (153) [2022-04-06 23:23:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 886 transitions. [2022-04-06 23:23:36,355 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 886 transitions. Word has length 274 [2022-04-06 23:23:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:36,355 INFO L478 AbstractCegarLoop]: Abstraction has 789 states and 886 transitions. [2022-04-06 23:23:36,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 8 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 8 states have call predecessors, (33), 8 states have call successors, (33) [2022-04-06 23:23:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 886 transitions. [2022-04-06 23:23:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-04-06 23:23:36,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:36,358 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 41, 11, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:36,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 23:23:36,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 23:23:36,578 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1196997250, now seen corresponding path program 37 times [2022-04-06 23:23:36,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:36,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832933290] [2022-04-06 23:23:36,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:36,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1196997250, now seen corresponding path program 38 times [2022-04-06 23:23:36,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:36,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358510442] [2022-04-06 23:23:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:36,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:36,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053889383] [2022-04-06 23:23:36,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:23:36,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:36,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:36,596 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:23:36,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 23:23:36,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:23:36,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:23:36,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 23:23:36,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:23:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3778 backedges. 82 proven. 3572 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 23:23:37,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:23:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3778 backedges. 82 proven. 416 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2022-04-06 23:23:37,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:23:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358510442] [2022-04-06 23:23:37,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:23:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053889383] [2022-04-06 23:23:37,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053889383] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:23:37,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:23:37,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-04-06 23:23:37,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:23:37,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832933290] [2022-04-06 23:23:37,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832933290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:23:37,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:23:37,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 23:23:37,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728766624] [2022-04-06 23:23:37,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:23:37,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 23:23:37,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 23:23:37,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:23:37,643 INFO L87 Difference]: Start difference. First operand 789 states and 886 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 20 states have call successors, (44), 20 states have call predecessors, (44), 18 states have return successors, (42), 18 states have call predecessors, (42), 18 states have call successors, (42) [2022-04-06 23:23:38,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:23:38,133 INFO L93 Difference]: Finished difference Result 883 states and 998 transitions. [2022-04-06 23:23:38,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 23:23:38,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 20 states have call successors, (44), 20 states have call predecessors, (44), 18 states have return successors, (42), 18 states have call predecessors, (42), 18 states have call successors, (42) Word has length 278 [2022-04-06 23:23:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:23:38,136 INFO L225 Difference]: With dead ends: 883 [2022-04-06 23:23:38,137 INFO L226 Difference]: Without dead ends: 860 [2022-04-06 23:23:38,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 532 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 23:23:38,138 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 204 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:23:38,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 385 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 23:23:38,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-04-06 23:23:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 859. [2022-04-06 23:23:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 580 states have (on average 1.0827586206896551) internal successors, (628), 598 states have internal predecessors, (628), 171 states have call successors, (171), 109 states have call predecessors, (171), 107 states have return successors, (168), 151 states have call predecessors, (168), 168 states have call successors, (168) [2022-04-06 23:23:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 967 transitions. [2022-04-06 23:23:38,221 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 967 transitions. Word has length 278 [2022-04-06 23:23:38,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:23:38,223 INFO L478 AbstractCegarLoop]: Abstraction has 859 states and 967 transitions. [2022-04-06 23:23:38,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 20 states have call successors, (44), 20 states have call predecessors, (44), 18 states have return successors, (42), 18 states have call predecessors, (42), 18 states have call successors, (42) [2022-04-06 23:23:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 967 transitions. [2022-04-06 23:23:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-04-06 23:23:38,226 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:23:38,226 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 43, 12, 11, 11, 11, 11, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:23:38,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 23:23:38,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 23:23:38,443 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:23:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:23:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1719364266, now seen corresponding path program 39 times [2022-04-06 23:23:38,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:23:38,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2057973978] [2022-04-06 23:23:38,447 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:23:38,447 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:23:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1719364266, now seen corresponding path program 40 times [2022-04-06 23:23:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:23:38,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843471575] [2022-04-06 23:23:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:23:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:23:38,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:23:38,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282967740] [2022-04-06 23:23:38,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:23:38,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:23:38,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:23:38,458 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:23:38,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 23:24:29,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:24:29,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:24:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 23:24:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:24:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 86 proven. 3962 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-04-06 23:24:29,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:24:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 86 proven. 478 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2022-04-06 23:24:30,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:24:30,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843471575] [2022-04-06 23:24:30,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:24:30,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282967740] [2022-04-06 23:24:30,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282967740] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:24:30,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:24:30,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2022-04-06 23:24:30,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:24:30,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2057973978] [2022-04-06 23:24:30,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2057973978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:24:30,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:24:30,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 23:24:30,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931063798] [2022-04-06 23:24:30,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:24:30,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 23:24:30,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:24:30,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 23:24:30,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:24:30,185 INFO L87 Difference]: Start difference. First operand 859 states and 967 transitions. Second operand has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 21 states have internal predecessors, (127), 21 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2022-04-06 23:24:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:24:30,754 INFO L93 Difference]: Finished difference Result 953 states and 1079 transitions. [2022-04-06 23:24:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 23:24:30,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 21 states have internal predecessors, (127), 21 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) Word has length 292 [2022-04-06 23:24:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:24:30,758 INFO L225 Difference]: With dead ends: 953 [2022-04-06 23:24:30,759 INFO L226 Difference]: Without dead ends: 930 [2022-04-06 23:24:30,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 560 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=412, Invalid=778, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 23:24:30,759 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 258 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:24:30,760 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 417 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 23:24:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-04-06 23:24:30,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 929. [2022-04-06 23:24:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 627 states have (on average 1.0829346092503986) internal successors, (679), 647 states have internal predecessors, (679), 186 states have call successors, (186), 117 states have call predecessors, (186), 115 states have return successors, (183), 164 states have call predecessors, (183), 183 states have call successors, (183) [2022-04-06 23:24:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1048 transitions. [2022-04-06 23:24:30,848 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1048 transitions. Word has length 292 [2022-04-06 23:24:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:24:30,848 INFO L478 AbstractCegarLoop]: Abstraction has 929 states and 1048 transitions. [2022-04-06 23:24:30,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7727272727272725) internal successors, (127), 21 states have internal predecessors, (127), 21 states have call successors, (46), 21 states have call predecessors, (46), 19 states have return successors, (44), 19 states have call predecessors, (44), 19 states have call successors, (44) [2022-04-06 23:24:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1048 transitions. [2022-04-06 23:24:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-04-06 23:24:30,851 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:24:30,851 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 45, 13, 12, 12, 12, 12, 12, 12, 12, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:24:30,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 23:24:31,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 23:24:31,068 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:24:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:24:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2036404950, now seen corresponding path program 41 times [2022-04-06 23:24:31,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:24:31,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358431063] [2022-04-06 23:24:31,070 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:24:31,070 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:24:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2036404950, now seen corresponding path program 42 times [2022-04-06 23:24:31,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:24:31,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360858864] [2022-04-06 23:24:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:24:31,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:24:31,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:24:31,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399999380] [2022-04-06 23:24:31,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:24:31,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:24:31,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:24:31,079 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:24:31,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 23:24:31,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 23:24:31,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:24:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 23:24:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:24:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 1767 proven. 276 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2022-04-06 23:24:32,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:24:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 387 proven. 306 refuted. 0 times theorem prover too weak. 3903 trivial. 0 not checked. [2022-04-06 23:24:34,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:24:34,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360858864] [2022-04-06 23:24:34,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:24:34,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399999380] [2022-04-06 23:24:34,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399999380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:24:34,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:24:34,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2022-04-06 23:24:34,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:24:34,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358431063] [2022-04-06 23:24:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358431063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:24:34,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:24:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 23:24:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279510382] [2022-04-06 23:24:34,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:24:34,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 23:24:34,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:24:34,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 23:24:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-04-06 23:24:34,955 INFO L87 Difference]: Start difference. First operand 929 states and 1048 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 14 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2022-04-06 23:24:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:24:35,563 INFO L93 Difference]: Finished difference Result 1091 states and 1252 transitions. [2022-04-06 23:24:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 23:24:35,564 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 14 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) Word has length 306 [2022-04-06 23:24:35,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:24:35,578 INFO L225 Difference]: With dead ends: 1091 [2022-04-06 23:24:35,578 INFO L226 Difference]: Without dead ends: 877 [2022-04-06 23:24:35,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 582 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-04-06 23:24:35,581 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 41 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 23:24:35,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 683 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 23:24:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-04-06 23:24:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 877. [2022-04-06 23:24:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 592 states have (on average 1.0810810810810811) internal successors, (640), 610 states have internal predecessors, (640), 174 states have call successors, (174), 112 states have call predecessors, (174), 110 states have return successors, (171), 154 states have call predecessors, (171), 171 states have call successors, (171) [2022-04-06 23:24:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 985 transitions. [2022-04-06 23:24:35,668 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 985 transitions. Word has length 306 [2022-04-06 23:24:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:24:35,669 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 985 transitions. [2022-04-06 23:24:35,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 14 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2022-04-06 23:24:35,669 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 985 transitions. [2022-04-06 23:24:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-04-06 23:24:35,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:24:35,671 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 46, 12, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:24:35,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 23:24:35,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:24:35,879 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:24:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:24:35,879 INFO L85 PathProgramCache]: Analyzing trace with hash 249588560, now seen corresponding path program 43 times [2022-04-06 23:24:35,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:24:35,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381349499] [2022-04-06 23:24:35,882 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:24:35,882 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:24:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash 249588560, now seen corresponding path program 44 times [2022-04-06 23:24:35,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:24:35,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967475896] [2022-04-06 23:24:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:24:35,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:24:35,892 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:24:35,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754011777] [2022-04-06 23:24:35,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:24:35,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:24:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:24:35,894 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:24:35,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 23:24:36,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:24:36,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:24:36,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 23:24:36,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:24:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 92 proven. 4520 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-04-06 23:24:36,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:24:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 92 proven. 520 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-04-06 23:24:37,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:24:37,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967475896] [2022-04-06 23:24:37,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:24:37,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754011777] [2022-04-06 23:24:37,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754011777] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:24:37,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:24:37,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2022-04-06 23:24:37,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:24:37,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381349499] [2022-04-06 23:24:37,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381349499] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:24:37,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:24:37,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 23:24:37,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166348899] [2022-04-06 23:24:37,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:24:37,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 23:24:37,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:24:37,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 23:24:37,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-04-06 23:24:37,044 INFO L87 Difference]: Start difference. First operand 877 states and 985 transitions. Second operand has 23 states, 23 states have (on average 5.782608695652174) internal successors, (133), 22 states have internal predecessors, (133), 22 states have call successors, (49), 22 states have call predecessors, (49), 20 states have return successors, (47), 20 states have call predecessors, (47), 20 states have call successors, (47) [2022-04-06 23:24:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:24:37,532 INFO L93 Difference]: Finished difference Result 971 states and 1097 transitions. [2022-04-06 23:24:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 23:24:37,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.782608695652174) internal successors, (133), 22 states have internal predecessors, (133), 22 states have call successors, (49), 22 states have call predecessors, (49), 20 states have return successors, (47), 20 states have call predecessors, (47), 20 states have call successors, (47) Word has length 310 [2022-04-06 23:24:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:24:37,536 INFO L225 Difference]: With dead ends: 971 [2022-04-06 23:24:37,536 INFO L226 Difference]: Without dead ends: 948 [2022-04-06 23:24:37,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 597 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=387, Invalid=735, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 23:24:37,537 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 217 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:24:37,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 430 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 23:24:37,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-04-06 23:24:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 947. [2022-04-06 23:24:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 639 states have (on average 1.081377151799687) internal successors, (691), 659 states have internal predecessors, (691), 189 states have call successors, (189), 120 states have call predecessors, (189), 118 states have return successors, (186), 167 states have call predecessors, (186), 186 states have call successors, (186) [2022-04-06 23:24:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1066 transitions. [2022-04-06 23:24:37,626 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1066 transitions. Word has length 310 [2022-04-06 23:24:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:24:37,626 INFO L478 AbstractCegarLoop]: Abstraction has 947 states and 1066 transitions. [2022-04-06 23:24:37,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.782608695652174) internal successors, (133), 22 states have internal predecessors, (133), 22 states have call successors, (49), 22 states have call predecessors, (49), 20 states have return successors, (47), 20 states have call predecessors, (47), 20 states have call successors, (47) [2022-04-06 23:24:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1066 transitions. [2022-04-06 23:24:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-04-06 23:24:37,629 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:24:37,629 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 13, 12, 12, 12, 12, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:24:37,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 23:24:37,836 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:24:37,836 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:24:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:24:37,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1363998972, now seen corresponding path program 45 times [2022-04-06 23:24:37,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:24:37,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [227980610] [2022-04-06 23:24:37,839 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:24:37,839 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:24:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1363998972, now seen corresponding path program 46 times [2022-04-06 23:24:37,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:24:37,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590337897] [2022-04-06 23:24:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:24:37,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:24:37,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:24:37,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383452945] [2022-04-06 23:24:37,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:24:37,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:24:37,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:24:37,849 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:24:37,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 23:24:39,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:24:39,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:24:39,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 23:24:39,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:24:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 1571 proven. 329 refuted. 0 times theorem prover too weak. 3296 trivial. 0 not checked. [2022-04-06 23:24:39,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:24:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5196 backedges. 313 proven. 323 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2022-04-06 23:24:41,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:24:41,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590337897] [2022-04-06 23:24:41,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:24:41,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383452945] [2022-04-06 23:24:41,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383452945] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:24:41,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:24:41,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-04-06 23:24:41,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:24:41,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [227980610] [2022-04-06 23:24:41,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [227980610] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:24:41,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:24:41,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 23:24:41,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983478038] [2022-04-06 23:24:41,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:24:41,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 23:24:41,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:24:41,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 23:24:41,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 23:24:41,295 INFO L87 Difference]: Start difference. First operand 947 states and 1066 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 10 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 10 states have call predecessors, (43), 10 states have call successors, (43) [2022-04-06 23:24:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:24:41,629 INFO L93 Difference]: Finished difference Result 1091 states and 1254 transitions. [2022-04-06 23:24:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:24:41,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 10 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 10 states have call predecessors, (43), 10 states have call successors, (43) Word has length 324 [2022-04-06 23:24:41,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:24:41,633 INFO L225 Difference]: With dead ends: 1091 [2022-04-06 23:24:41,633 INFO L226 Difference]: Without dead ends: 895 [2022-04-06 23:24:41,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 630 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 23:24:41,634 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 6 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:24:41,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 766 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:24:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-04-06 23:24:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2022-04-06 23:24:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 604 states have (on average 1.0794701986754967) internal successors, (652), 622 states have internal predecessors, (652), 177 states have call successors, (177), 115 states have call predecessors, (177), 113 states have return successors, (174), 157 states have call predecessors, (174), 174 states have call successors, (174) [2022-04-06 23:24:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1003 transitions. [2022-04-06 23:24:41,733 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1003 transitions. Word has length 324 [2022-04-06 23:24:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:24:41,733 INFO L478 AbstractCegarLoop]: Abstraction has 895 states and 1003 transitions. [2022-04-06 23:24:41,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 10 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 10 states have call predecessors, (43), 10 states have call successors, (43) [2022-04-06 23:24:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1003 transitions. [2022-04-06 23:24:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-04-06 23:24:41,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:24:41,736 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 49, 12, 11, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:24:41,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 23:24:41,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 23:24:41,943 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:24:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:24:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1535062410, now seen corresponding path program 47 times [2022-04-06 23:24:41,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:24:41,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1613356887] [2022-04-06 23:24:41,947 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:24:41,947 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:24:41,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1535062410, now seen corresponding path program 48 times [2022-04-06 23:24:41,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:24:41,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648646542] [2022-04-06 23:24:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:24:41,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:24:41,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:24:41,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881488809] [2022-04-06 23:24:41,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:24:41,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:24:41,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:24:41,956 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:24:41,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 23:24:42,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 23:24:42,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:24:42,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 23:24:42,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:24:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 1317 proven. 541 refuted. 0 times theorem prover too weak. 3512 trivial. 0 not checked. [2022-04-06 23:24:43,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:25:05,979 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:26:42,927 WARN L232 SmtUtils]: Spent 42.87s on a formula simplification. DAG size of input: 117 DAG size of output: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)