/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 23:29:53,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 23:29:53,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 23:29:53,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 23:29:53,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 23:29:53,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 23:29:53,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 23:29:53,738 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 23:29:53,746 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 23:29:53,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 23:29:53,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 23:29:53,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 23:29:53,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 23:29:53,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 23:29:53,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 23:29:53,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 23:29:53,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 23:29:53,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 23:29:53,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 23:29:53,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 23:29:53,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 23:29:53,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 23:29:53,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 23:29:53,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:29:53,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 23:29:53,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 23:29:53,749 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 23:29:53,749 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 23:29:53,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 23:29:53,750 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 23:29:53,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 23:29:53,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 23:29:53,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 23:29:53,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 23:29:53,990 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 23:29:53,990 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 23:29:53,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound10.c [2022-04-06 23:29:54,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd35ffc2/94de311b5f054735b81c0ff1c707e6b4/FLAG8f5d1dfb2 [2022-04-06 23:29:54,435 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 23:29:54,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound10.c [2022-04-06 23:29:54,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd35ffc2/94de311b5f054735b81c0ff1c707e6b4/FLAG8f5d1dfb2 [2022-04-06 23:29:54,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd35ffc2/94de311b5f054735b81c0ff1c707e6b4 [2022-04-06 23:29:54,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 23:29:54,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 23:29:54,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 23:29:54,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 23:29:54,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 23:29:54,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:29:54" (1/1) ... [2022-04-06 23:29:54,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad63a0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54, skipping insertion in model container [2022-04-06 23:29:54,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:29:54" (1/1) ... [2022-04-06 23:29:54,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 23:29:54,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 23:29:54,601 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_valuebound10.c[526,539] [2022-04-06 23:29:54,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:29:54,618 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 23:29:54,626 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_valuebound10.c[526,539] [2022-04-06 23:29:54,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:29:54,642 INFO L208 MainTranslator]: Completed translation [2022-04-06 23:29:54,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54 WrapperNode [2022-04-06 23:29:54,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 23:29:54,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 23:29:54,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 23:29:54,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 23:29:54,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54" (1/1) ... [2022-04-06 23:29:54,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54" (1/1) ... [2022-04-06 23:29:54,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54" (1/1) ... [2022-04-06 23:29:54,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54" (1/1) ... [2022-04-06 23:29:54,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54" (1/1) ... [2022-04-06 23:29:54,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54" (1/1) ... [2022-04-06 23:29:54,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54" (1/1) ... [2022-04-06 23:29:54,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 23:29:54,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 23:29:54,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 23:29:54,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 23:29:54,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54" (1/1) ... [2022-04-06 23:29:54,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:29:54,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:54,726 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 23:29:54,747 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 23:29:54,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 23:29:54,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 23:29:54,763 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 23:29:54,763 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 23:29:54,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 23:29:54,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 23:29:54,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 23:29:54,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 23:29:54,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 23:29:54,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 23:29:54,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 23:29:54,765 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 23:29:54,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 23:29:54,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 23:29:54,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 23:29:54,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 23:29:54,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 23:29:54,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 23:29:54,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 23:29:54,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 23:29:54,819 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 23:29:54,820 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 23:29:54,914 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 23:29:54,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 23:29:54,919 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 23:29:54,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:29:54 BoogieIcfgContainer [2022-04-06 23:29:54,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 23:29:54,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 23:29:54,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 23:29:54,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 23:29:54,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:29:54" (1/3) ... [2022-04-06 23:29:54,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7413919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:29:54, skipping insertion in model container [2022-04-06 23:29:54,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:54" (2/3) ... [2022-04-06 23:29:54,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7413919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:29:54, skipping insertion in model container [2022-04-06 23:29:54,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:29:54" (3/3) ... [2022-04-06 23:29:54,928 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound10.c [2022-04-06 23:29:54,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 23:29:54,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 23:29:54,963 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 23:29:54,968 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 23:29:54,968 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 23:29:54,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 23:29:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 23:29:54,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:54,988 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:54,988 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:54,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2022-04-06 23:29:54,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:54,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1054052650] [2022-04-06 23:29:55,006 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:29:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 2 times [2022-04-06 23:29:55,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:55,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759071547] [2022-04-06 23:29:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:55,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:55,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:29:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:55,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:29:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:55,141 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 23:29:55,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:55,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759071547] [2022-04-06 23:29:55,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759071547] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:55,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:55,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:29:55,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:55,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1054052650] [2022-04-06 23:29:55,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1054052650] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:55,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:55,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:29:55,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918624562] [2022-04-06 23:29:55,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:55,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 23:29:55,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:55,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 23:29:55,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:29:55,191 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:29:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:55,317 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-04-06 23:29:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 23:29:55,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 23:29:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:55,324 INFO L225 Difference]: With dead ends: 61 [2022-04-06 23:29:55,325 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 23:29:55,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 23:29:55,329 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:55,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:29:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 23:29:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 23:29:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:29:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-04-06 23:29:55,365 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-04-06 23:29:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:55,365 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-04-06 23:29:55,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:29:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-04-06 23:29:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 23:29:55,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:55,366 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:55,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 23:29:55,367 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:55,367 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2022-04-06 23:29:55,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:55,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [406465321] [2022-04-06 23:29:55,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:29:55,368 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 2 times [2022-04-06 23:29:55,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:55,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269953366] [2022-04-06 23:29:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:55,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:55,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:29:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:55,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:29:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:55,464 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 23:29:55,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:55,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269953366] [2022-04-06 23:29:55,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269953366] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:55,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:55,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:29:55,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:55,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [406465321] [2022-04-06 23:29:55,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [406465321] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:55,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:55,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:29:55,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294910791] [2022-04-06 23:29:55,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:55,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:29:55,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:29:55,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:29:55,468 INFO L87 Difference]: Start difference. First operand 30 states and 38 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), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:29:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:55,691 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-04-06 23:29:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:29:55,692 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), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 23:29:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:55,693 INFO L225 Difference]: With dead ends: 43 [2022-04-06 23:29:55,693 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 23:29:55,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:29:55,694 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:55,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:29:55,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 23:29:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-04-06 23:29:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:29:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-04-06 23:29:55,712 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-04-06 23:29:55,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:55,712 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-04-06 23:29:55,712 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), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:29:55,712 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-04-06 23:29:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 23:29:55,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:55,714 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:55,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 23:29:55,714 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:55,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:55,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2022-04-06 23:29:55,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:55,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1773604311] [2022-04-06 23:29:55,722 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:29:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 2 times [2022-04-06 23:29:55,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:55,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545677905] [2022-04-06 23:29:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:55,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:29:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:55,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:29:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:55,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 23:29:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:55,817 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 23:29:55,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:55,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545677905] [2022-04-06 23:29:55,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545677905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:55,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:55,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:29:55,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:55,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1773604311] [2022-04-06 23:29:55,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1773604311] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:55,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:55,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:29:55,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665080884] [2022-04-06 23:29:55,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:55,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:29:55,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:55,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:29:55,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:29:55,820 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 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 23:29:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:55,961 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-04-06 23:29:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:29:55,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 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 23:29:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:55,965 INFO L225 Difference]: With dead ends: 47 [2022-04-06 23:29:55,965 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 23:29:55,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 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 23:29:55,968 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:55,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:29:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 23:29:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-04-06 23:29:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:29:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-04-06 23:29:55,991 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-04-06 23:29:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:55,991 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-04-06 23:29:55,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 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 23:29:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-04-06 23:29:55,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 23:29:55,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:55,994 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:55,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 23:29:55,996 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:55,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:55,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2022-04-06 23:29:55,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:55,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [161095162] [2022-04-06 23:29:56,000 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:29:56,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 2 times [2022-04-06 23:29:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:56,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672535784] [2022-04-06 23:29:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:56,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:56,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:56,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910860835] [2022-04-06 23:29:56,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:29:56,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:56,012 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 23:29:56,017 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 23:29:56,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:29:56,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:56,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 23:29:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:56,257 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 23:29:56,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:29:56,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:56,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672535784] [2022-04-06 23:29:56,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:29:56,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910860835] [2022-04-06 23:29:56,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910860835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:56,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:56,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:29:56,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [161095162] [2022-04-06 23:29:56,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [161095162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:56,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:56,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:29:56,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471571635] [2022-04-06 23:29:56,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:56,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:29:56,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:56,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:29:56,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:29:56,266 INFO L87 Difference]: Start difference. First operand 38 states and 44 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 23:29:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:56,319 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-04-06 23:29:56,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:29:56,319 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 27 [2022-04-06 23:29:56,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:56,320 INFO L225 Difference]: With dead ends: 66 [2022-04-06 23:29:56,320 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 23:29:56,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 23:29:56,321 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 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 23:29:56,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:29:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 23:29:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 23:29:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 23:29:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-04-06 23:29:56,330 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-04-06 23:29:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:56,330 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-04-06 23:29:56,330 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 23:29:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-04-06 23:29:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 23:29:56,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:56,331 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, 1, 1, 1, 1] [2022-04-06 23:29:56,352 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 23:29:56,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:56,548 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:56,548 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2022-04-06 23:29:56,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:56,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327269231] [2022-04-06 23:29:56,549 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:29:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 2 times [2022-04-06 23:29:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:56,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888308268] [2022-04-06 23:29:56,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:56,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:56,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:56,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936351209] [2022-04-06 23:29:56,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:29:56,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:56,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:56,560 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 23:29:56,563 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 23:29:56,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:29:56,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:56,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:29:56,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:56,707 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 23:29:56,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:29:56,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:56,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888308268] [2022-04-06 23:29:56,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:29:56,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936351209] [2022-04-06 23:29:56,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936351209] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:56,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:56,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:29:56,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:56,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327269231] [2022-04-06 23:29:56,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327269231] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:56,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:56,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:29:56,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629421229] [2022-04-06 23:29:56,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:56,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:29:56,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:56,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:29:56,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:29:56,710 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:29:56,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:56,764 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-04-06 23:29:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:29:56,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 23:29:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:56,768 INFO L225 Difference]: With dead ends: 65 [2022-04-06 23:29:56,768 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 23:29:56,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 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 23:29:56,769 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:56,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:29:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 23:29:56,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-04-06 23:29:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 23:29:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-04-06 23:29:56,792 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-04-06 23:29:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:56,792 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-04-06 23:29:56,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:29:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-04-06 23:29:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 23:29:56,795 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:56,795 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:56,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 23:29:57,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:57,012 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2022-04-06 23:29:57,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:57,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [392195153] [2022-04-06 23:29:57,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:29:57,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:29:57,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 2 times [2022-04-06 23:29:57,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:57,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761755136] [2022-04-06 23:29:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:57,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:57,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:57,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583754555] [2022-04-06 23:29:57,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:29:57,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:57,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:57,065 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 23:29:57,067 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 23:29:57,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:29:57,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:57,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 23:29:57,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 23:29:57,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:29:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 23:29:57,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:57,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761755136] [2022-04-06 23:29:57,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:29:57,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583754555] [2022-04-06 23:29:57,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583754555] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 23:29:57,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:29:57,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 23:29:57,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:57,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [392195153] [2022-04-06 23:29:57,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [392195153] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:57,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:57,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:29:57,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069171800] [2022-04-06 23:29:57,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:57,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:29:57,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:57,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:29:57,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 23:29:57,367 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:29:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:57,488 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-04-06 23:29:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:29:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-04-06 23:29:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:57,492 INFO L225 Difference]: With dead ends: 69 [2022-04-06 23:29:57,492 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 23:29:57,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 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 23:29:57,492 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:57,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:29:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 23:29:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-04-06 23:29:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 23:29:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-04-06 23:29:57,501 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-04-06 23:29:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:57,501 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-04-06 23:29:57,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:29:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-04-06 23:29:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 23:29:57,502 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:57,503 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, 1, 1] [2022-04-06 23:29:57,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 23:29:57,704 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:57,704 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2022-04-06 23:29:57,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:57,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546437808] [2022-04-06 23:29:57,708 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:29:57,708 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:29:57,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 2 times [2022-04-06 23:29:57,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:57,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464242839] [2022-04-06 23:29:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:57,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:57,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:57,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686690715] [2022-04-06 23:29:57,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:29:57,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:57,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:57,725 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 23:29:57,726 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 23:29:57,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:29:57,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:57,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 23:29:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:29:58,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:29:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:29:58,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:58,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464242839] [2022-04-06 23:29:58,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:29:58,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686690715] [2022-04-06 23:29:58,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686690715] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:29:58,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:29:58,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 23:29:58,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:58,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546437808] [2022-04-06 23:29:58,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546437808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:58,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:58,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:29:58,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355791] [2022-04-06 23:29:58,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:58,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:29:58,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:58,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:29:58,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:29:58,868 INFO L87 Difference]: Start difference. First operand 64 states and 77 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 23:29:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:59,018 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-04-06 23:29:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:29:59,019 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2022-04-06 23:29:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:59,020 INFO L225 Difference]: With dead ends: 130 [2022-04-06 23:29:59,020 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 23:29:59,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 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 23:29:59,021 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:59,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 172 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:29:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 23:29:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-04-06 23:29:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 23:29:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-04-06 23:29:59,032 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 64 [2022-04-06 23:29:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:59,033 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-04-06 23:29:59,033 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 23:29:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-04-06 23:29:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 23:29:59,034 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:59,034 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 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, 1, 1, 1, 1] [2022-04-06 23:29:59,056 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 23:29:59,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:59,247 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 3 times [2022-04-06 23:29:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:59,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1221574279] [2022-04-06 23:29:59,251 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:29:59,251 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:29:59,251 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 4 times [2022-04-06 23:29:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:59,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543502837] [2022-04-06 23:29:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:59,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:59,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:59,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071418931] [2022-04-06 23:29:59,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:29:59,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:59,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:59,275 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 23:29:59,276 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 23:29:59,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:29:59,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:59,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 23:29:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 23:29:59,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:30:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 23:30:00,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:00,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543502837] [2022-04-06 23:30:00,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:30:00,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071418931] [2022-04-06 23:30:00,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071418931] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:30:00,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:30:00,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 23:30:00,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:00,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1221574279] [2022-04-06 23:30:00,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1221574279] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:00,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:00,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:30:00,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850302027] [2022-04-06 23:30:00,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:00,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:30:00,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:00,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:30:00,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 23:30:00,217 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 23:30:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:00,308 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-04-06 23:30:00,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:30:00,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2022-04-06 23:30:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:00,312 INFO L225 Difference]: With dead ends: 126 [2022-04-06 23:30:00,312 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 23:30:00,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 23:30:00,313 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:00,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 175 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:30:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 23:30:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 23:30:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 66 states have internal predecessors, (69), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 23:30:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-04-06 23:30:00,324 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 69 [2022-04-06 23:30:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:00,324 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-04-06 23:30:00,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 23:30:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-04-06 23:30:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 23:30:00,328 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:00,328 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:00,348 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 23:30:00,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:00,546 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:00,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2022-04-06 23:30:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:00,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [334506423] [2022-04-06 23:30:00,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:30:00,549 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:30:00,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 2 times [2022-04-06 23:30:00,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:00,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482465034] [2022-04-06 23:30:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:00,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:00,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:30:00,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841360908] [2022-04-06 23:30:00,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:30:00,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:00,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:30:00,571 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 23:30:00,572 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 23:30:00,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:30:00,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:30:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 23:30:00,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:30:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 62 proven. 30 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 23:30:00,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:30:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 23:30:01,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:30:01,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482465034] [2022-04-06 23:30:01,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:30:01,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841360908] [2022-04-06 23:30:01,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841360908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:30:01,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:30:01,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 23:30:01,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:30:01,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [334506423] [2022-04-06 23:30:01,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [334506423] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:30:01,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:30:01,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 23:30:01,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124103472] [2022-04-06 23:30:01,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:30:01,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 23:30:01,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 23:30:01,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:30:01,157 INFO L87 Difference]: Start difference. First operand 103 states and 118 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 23:30:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:30:01,323 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2022-04-06 23:30:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:30:01,324 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-04-06 23:30:01,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:30:01,324 INFO L225 Difference]: With dead ends: 109 [2022-04-06 23:30:01,325 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 23:30:01,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 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 23:30:01,325 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 16 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:30:01,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 144 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:30:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 23:30:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 23:30:01,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.125) internal successors, (54), 51 states have internal predecessors, (54), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 23:30:01,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2022-04-06 23:30:01,332 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 75 [2022-04-06 23:30:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:30:01,333 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2022-04-06 23:30:01,333 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, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 23:30:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2022-04-06 23:30:01,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 23:30:01,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:30:01,333 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:30:01,354 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 23:30:01,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:01,540 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:30:01,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:30:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 5 times [2022-04-06 23:30:01,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:30:01,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1324345667] [2022-04-06 23:30:01,542 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:30:01,543 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:30:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 6 times [2022-04-06 23:30:01,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:30:01,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345103136] [2022-04-06 23:30:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:30:01,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:30:01,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:30:01,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098557463] [2022-04-06 23:30:01,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:30:01,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:30:01,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:30:01,551 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 23:30:01,552 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 23:30:01,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 23:30:01,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:30:01,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 23:30:01,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:30:01,919 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:30:01,932 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:30:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 23:30:02,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:30:18,967 WARN L855 $PredicateComparison]: unable to prove that (or (let ((.cse4 (= (mod c_main_~p~0 2) 0)) (.cse8 (< c_main_~p~0 0)) (.cse9 (div c_main_~p~0 2))) (let ((.cse7 (< c_main_~d~0 0)) (.cse6 (= (mod c_main_~d~0 2) 0)) (.cse3 (* (+ c_main_~q~0 .cse9 1) c_main_~B~0)) (.cse5 (not .cse8)) (.cse0 (* (- 1) (div c_main_~d~0 2))) (.cse1 (* (+ c_main_~q~0 .cse9) c_main_~B~0)) (.cse2 (and (not .cse4) .cse8))) (and (or (and (or (= c_main_~A~0 (+ (- 1) c_main_~r~0 .cse0 .cse1)) .cse2) (or (= c_main_~A~0 (+ (- 1) .cse3 c_main_~r~0 .cse0)) .cse4 .cse5)) .cse6 (not .cse7)) (or (and .cse7 (not .cse6)) (and (or (= (+ .cse3 c_main_~r~0 .cse0) c_main_~A~0) .cse4 .cse5) (or (= c_main_~A~0 (+ c_main_~r~0 .cse0 .cse1)) .cse2)))))) (not (= (* c_main_~p~0 c_main_~B~0) c_main_~d~0))) is different from true [2022-04-06 23:31:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 11 refuted. 0 times theorem prover too weak. 195 trivial. 8 not checked. [2022-04-06 23:31:03,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:03,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345103136] [2022-04-06 23:31:03,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:03,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098557463] [2022-04-06 23:31:03,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098557463] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:31:03,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:31:03,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-04-06 23:31:03,394 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:03,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1324345667] [2022-04-06 23:31:03,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1324345667] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:03,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:03,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:31:03,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311347566] [2022-04-06 23:31:03,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:03,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:31:03,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:03,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:31:03,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=162, Unknown=1, NotChecked=26, Total=240 [2022-04-06 23:31:03,396 INFO L87 Difference]: Start difference. First operand 81 states and 94 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 23:31:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:03,560 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2022-04-06 23:31:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:31:03,561 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 81 [2022-04-06 23:31:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:03,562 INFO L225 Difference]: With dead ends: 106 [2022-04-06 23:31:03,562 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 23:31:03,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=64, Invalid=211, Unknown=1, NotChecked=30, Total=306 [2022-04-06 23:31:03,563 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:03,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 105 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:31:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 23:31:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-04-06 23:31:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 23:31:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-04-06 23:31:03,573 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 81 [2022-04-06 23:31:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:03,573 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-04-06 23:31:03,574 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 23:31:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-04-06 23:31:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 23:31:03,574 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:31:03,575 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:31:03,594 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 23:31:03,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:03,787 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:31:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:31:03,788 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 7 times [2022-04-06 23:31:03,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:03,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [592803850] [2022-04-06 23:31:03,790 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:31:03,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:31:03,790 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 8 times [2022-04-06 23:31:03,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:31:03,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102763599] [2022-04-06 23:31:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:31:03,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:31:03,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:31:03,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237611816] [2022-04-06 23:31:03,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:31:03,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:03,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:31:03,800 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 23:31:03,801 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 23:31:03,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:31:03,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:31:03,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 23:31:03,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:31:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 23:31:04,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:31:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-04-06 23:31:04,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:04,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102763599] [2022-04-06 23:31:04,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:04,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237611816] [2022-04-06 23:31:04,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237611816] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:31:04,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:31:04,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 23:31:04,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:04,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [592803850] [2022-04-06 23:31:04,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [592803850] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:04,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:04,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:31:04,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964844621] [2022-04-06 23:31:04,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:04,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:31:04,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:04,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:31:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 23:31:04,805 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 23:31:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:04,931 INFO L93 Difference]: Finished difference Result 170 states and 221 transitions. [2022-04-06 23:31:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:31:04,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 86 [2022-04-06 23:31:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:04,933 INFO L225 Difference]: With dead ends: 170 [2022-04-06 23:31:04,933 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 23:31:04,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:31:04,933 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:04,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:31:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 23:31:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-04-06 23:31:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.141025641025641) internal successors, (89), 82 states have internal predecessors, (89), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 23:31:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2022-04-06 23:31:04,955 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 86 [2022-04-06 23:31:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:04,955 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2022-04-06 23:31:04,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 23:31:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2022-04-06 23:31:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 23:31:04,956 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:31:04,956 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:31:04,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 23:31:05,175 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,SelfDestructingSolverStorable10 [2022-04-06 23:31:05,176 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:31:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:31:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 9 times [2022-04-06 23:31:05,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:05,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [989245386] [2022-04-06 23:31:05,178 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:31:05,178 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:31:05,178 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 10 times [2022-04-06 23:31:05,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:31:05,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110276456] [2022-04-06 23:31:05,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:31:05,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:31:05,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:31:05,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604989669] [2022-04-06 23:31:05,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:31:05,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:31:05,187 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 23:31:05,188 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 23:31:05,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:31:05,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:31:05,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 23:31:05,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:31:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:31:05,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:31:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 23:31:29,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110276456] [2022-04-06 23:31:29,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:29,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604989669] [2022-04-06 23:31:29,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604989669] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:31:29,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:31:29,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 23:31:29,823 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [989245386] [2022-04-06 23:31:29,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [989245386] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:29,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:29,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 23:31:29,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286540845] [2022-04-06 23:31:29,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:29,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 23:31:29,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:29,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 23:31:29,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2022-04-06 23:31:29,826 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:31:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:30,113 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2022-04-06 23:31:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:31:30,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2022-04-06 23:31:30,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:30,115 INFO L225 Difference]: With dead ends: 164 [2022-04-06 23:31:30,115 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 23:31:30,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=64, Invalid=207, Unknown=1, NotChecked=0, Total=272 [2022-04-06 23:31:30,115 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:30,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 266 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:31:30,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 23:31:30,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2022-04-06 23:31:30,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 100 states have internal predecessors, (106), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 23:31:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 175 transitions. [2022-04-06 23:31:30,129 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 175 transitions. Word has length 94 [2022-04-06 23:31:30,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:30,129 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 175 transitions. [2022-04-06 23:31:30,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:31:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 175 transitions. [2022-04-06 23:31:30,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 23:31:30,130 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:31:30,130 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:31:30,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 23:31:30,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:30,344 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:31:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:31:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash -321511332, now seen corresponding path program 11 times [2022-04-06 23:31:30,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:30,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [196504158] [2022-04-06 23:31:30,348 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:31:30,348 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:31:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash -321511332, now seen corresponding path program 12 times [2022-04-06 23:31:30,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:31:30,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385087854] [2022-04-06 23:31:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:31:30,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:31:30,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:31:30,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832232491] [2022-04-06 23:31:30,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:31:30,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:30,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:31:30,380 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 23:31:30,384 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 23:31:30,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 23:31:30,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:31:30,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 23:31:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:31:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-04-06 23:31:30,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:31:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 69 proven. 23 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-04-06 23:31:31,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:31,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385087854] [2022-04-06 23:31:31,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:31,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832232491] [2022-04-06 23:31:31,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832232491] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:31:31,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:31:31,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 23:31:31,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:31,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [196504158] [2022-04-06 23:31:31,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [196504158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:31,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:31,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 23:31:31,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977673470] [2022-04-06 23:31:31,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:31,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 23:31:31,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 23:31:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 23:31:31,467 INFO L87 Difference]: Start difference. First operand 154 states and 175 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 23:31:31,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:31,598 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2022-04-06 23:31:31,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:31:31,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2022-04-06 23:31:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:31,599 INFO L225 Difference]: With dead ends: 164 [2022-04-06 23:31:31,599 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 23:31:31,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:31:31,600 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:31,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 120 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:31:31,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 23:31:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-04-06 23:31:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 106 states have internal predecessors, (112), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 23:31:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2022-04-06 23:31:31,614 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 103 [2022-04-06 23:31:31,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:31,614 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2022-04-06 23:31:31,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 23:31:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2022-04-06 23:31:31,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 23:31:31,615 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:31:31,615 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 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, 1, 1, 1, 1, 1, 1] [2022-04-06 23:31:31,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 23:31:31,835 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,SelfDestructingSolverStorable12 [2022-04-06 23:31:31,835 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:31:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:31:31,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 3 times [2022-04-06 23:31:31,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:31,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1672668745] [2022-04-06 23:31:31,838 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:31:31,838 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:31:31,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 4 times [2022-04-06 23:31:31,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:31:31,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355120259] [2022-04-06 23:31:31,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:31:31,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:31:31,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:31:31,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780758515] [2022-04-06 23:31:31,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:31:31,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:31,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:31:31,844 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 23:31:31,845 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 23:31:31,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:31:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:31:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 23:31:31,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:31:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 23:31:32,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:31:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 23:31:35,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355120259] [2022-04-06 23:31:35,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780758515] [2022-04-06 23:31:35,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780758515] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:31:35,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:31:35,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-04-06 23:31:35,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1672668745] [2022-04-06 23:31:35,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1672668745] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:35,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:35,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:31:35,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295411956] [2022-04-06 23:31:35,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:35,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:31:35,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:31:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:31:35,420 INFO L87 Difference]: Start difference. First operand 162 states and 181 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 23:31:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:35,631 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2022-04-06 23:31:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:31:35,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2022-04-06 23:31:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:35,632 INFO L225 Difference]: With dead ends: 171 [2022-04-06 23:31:35,633 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 23:31:35,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 191 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 23:31:35,633 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:35,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 276 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:31:35,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 23:31:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-04-06 23:31:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 89 states have (on average 1.101123595505618) internal successors, (98), 92 states have internal predecessors, (98), 33 states have call successors, (33), 21 states have call predecessors, (33), 20 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 23:31:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 161 transitions. [2022-04-06 23:31:35,644 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 161 transitions. Word has length 105 [2022-04-06 23:31:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:35,645 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 161 transitions. [2022-04-06 23:31:35,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 23:31:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 161 transitions. [2022-04-06 23:31:35,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 23:31:35,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:31:35,646 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 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, 1] [2022-04-06 23:31:35,663 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 23:31:35,851 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,SelfDestructingSolverStorable13 [2022-04-06 23:31:35,851 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:31:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:31:35,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1328912794, now seen corresponding path program 1 times [2022-04-06 23:31:35,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:35,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1281314386] [2022-04-06 23:31:35,864 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:31:35,864 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:31:35,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1328912794, now seen corresponding path program 2 times [2022-04-06 23:31:35,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:31:35,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510500761] [2022-04-06 23:31:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:31:35,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:31:35,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:31:35,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688962910] [2022-04-06 23:31:35,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:31:35,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:35,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:31:35,871 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 23:31:35,885 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 23:31:35,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:31:35,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:31:35,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 23:31:35,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:31:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 23:31:36,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:31:36,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:36,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510500761] [2022-04-06 23:31:36,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:36,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688962910] [2022-04-06 23:31:36,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688962910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:36,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:36,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:31:36,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:36,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1281314386] [2022-04-06 23:31:36,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1281314386] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:36,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:36,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:31:36,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921955888] [2022-04-06 23:31:36,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:36,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:31:36,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:36,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:31:36,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:31:36,155 INFO L87 Difference]: Start difference. First operand 143 states and 161 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:31:36,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:36,311 INFO L93 Difference]: Finished difference Result 195 states and 230 transitions. [2022-04-06 23:31:36,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:31:36,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 105 [2022-04-06 23:31:36,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:36,312 INFO L225 Difference]: With dead ends: 195 [2022-04-06 23:31:36,312 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 23:31:36,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 23:31:36,313 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 8 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:36,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 157 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:31:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 23:31:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2022-04-06 23:31:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 68 states have internal predecessors, (73), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 23:31:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2022-04-06 23:31:36,321 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 105 [2022-04-06 23:31:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:36,321 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2022-04-06 23:31:36,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:31:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2022-04-06 23:31:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 23:31:36,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:31:36,322 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 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 23:31:36,338 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 23:31:36,536 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,SelfDestructingSolverStorable14 [2022-04-06 23:31:36,536 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:31:36,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:31:36,537 INFO L85 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 5 times [2022-04-06 23:31:36,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:36,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [102821519] [2022-04-06 23:31:36,539 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:31:36,539 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:31:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 6 times [2022-04-06 23:31:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:31:36,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446176082] [2022-04-06 23:31:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:31:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:31:36,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:31:36,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834649501] [2022-04-06 23:31:36,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:31:36,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:36,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:31:36,548 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 23:31:36,548 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 23:31:36,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:31:36,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:31:36,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 23:31:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:31:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 23:31:36,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:31:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2022-04-06 23:31:37,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:37,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446176082] [2022-04-06 23:31:37,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:37,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834649501] [2022-04-06 23:31:37,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834649501] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:31:37,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:31:37,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2022-04-06 23:31:37,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:37,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [102821519] [2022-04-06 23:31:37,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [102821519] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:37,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:37,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:31:37,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484867054] [2022-04-06 23:31:37,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:37,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:31:37,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:37,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:31:37,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:31:37,099 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 23:31:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:37,151 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2022-04-06 23:31:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:31:37,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 109 [2022-04-06 23:31:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:37,154 INFO L225 Difference]: With dead ends: 128 [2022-04-06 23:31:37,154 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 23:31:37,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 208 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:31:37,154 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 17 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:37,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 122 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:31:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 23:31:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-04-06 23:31:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 75 states have internal predecessors, (81), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 23:31:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2022-04-06 23:31:37,180 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 109 [2022-04-06 23:31:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:37,180 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2022-04-06 23:31:37,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 23:31:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2022-04-06 23:31:37,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 23:31:37,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:31:37,181 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:31:37,209 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 23:31:37,395 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,SelfDestructingSolverStorable15 [2022-04-06 23:31:37,395 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:31:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:31:37,396 INFO L85 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 13 times [2022-04-06 23:31:37,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:37,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1552910120] [2022-04-06 23:31:37,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:31:37,398 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:31:37,398 INFO L85 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 14 times [2022-04-06 23:31:37,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:31:37,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607319777] [2022-04-06 23:31:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:31:37,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:31:37,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:31:37,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604761229] [2022-04-06 23:31:37,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:31:37,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:37,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:31:37,412 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 23:31:37,413 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 23:31:37,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:31:37,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:31:37,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 23:31:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:31:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 23:31:37,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:32:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 23:32:03,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:32:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607319777] [2022-04-06 23:32:03,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:32:03,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604761229] [2022-04-06 23:32:03,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604761229] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:32:03,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:32:03,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-04-06 23:32:03,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:32:03,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1552910120] [2022-04-06 23:32:03,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1552910120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:32:03,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:32:03,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:32:03,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298255654] [2022-04-06 23:32:03,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:32:03,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:32:03,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:03,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:32:03,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:32:03,130 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 23:32:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:32:03,443 INFO L93 Difference]: Finished difference Result 180 states and 208 transitions. [2022-04-06 23:32:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 23:32:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 111 [2022-04-06 23:32:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:32:03,444 INFO L225 Difference]: With dead ends: 180 [2022-04-06 23:32:03,444 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 23:32:03,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 202 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-04-06 23:32:03,445 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:32:03,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 304 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 23:32:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 23:32:03,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2022-04-06 23:32:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 111 states have internal predecessors, (120), 42 states have call successors, (42), 24 states have call predecessors, (42), 23 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 23:32:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 202 transitions. [2022-04-06 23:32:03,461 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 202 transitions. Word has length 111 [2022-04-06 23:32:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:32:03,461 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 202 transitions. [2022-04-06 23:32:03,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 23:32:03,462 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 202 transitions. [2022-04-06 23:32:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 23:32:03,462 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:32:03,462 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:32:03,481 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 23:32:03,681 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:32:03,681 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:32:03,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:32:03,682 INFO L85 PathProgramCache]: Analyzing trace with hash -238794489, now seen corresponding path program 15 times [2022-04-06 23:32:03,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:32:03,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818752880] [2022-04-06 23:32:03,685 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:32:03,686 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:32:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash -238794489, now seen corresponding path program 16 times [2022-04-06 23:32:03,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:32:03,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458735360] [2022-04-06 23:32:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:32:03,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:32:03,696 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:32:03,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301240914] [2022-04-06 23:32:03,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:32:03,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:32:03,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:32:03,704 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 23:32:03,705 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 23:32:03,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:32:03,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:32:03,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 23:32:03,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:32:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 23:32:04,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:32:39,336 WARN L232 SmtUtils]: Spent 6.68s on a formula simplification that was a NOOP. DAG size: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:34:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 23:34:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:34:24,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458735360] [2022-04-06 23:34:24,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:34:24,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301240914] [2022-04-06 23:34:24,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301240914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:34:24,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:34:24,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-04-06 23:34:24,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:34:24,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818752880] [2022-04-06 23:34:24,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818752880] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:34:24,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:34:24,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 23:34:24,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280620461] [2022-04-06 23:34:24,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:34:24,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 23:34:24,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:34:24,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 23:34:24,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=346, Unknown=2, NotChecked=0, Total=462 [2022-04-06 23:34:24,791 INFO L87 Difference]: Start difference. First operand 175 states and 202 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 23:34:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:34:25,299 INFO L93 Difference]: Finished difference Result 219 states and 257 transitions. [2022-04-06 23:34:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 23:34:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 124 [2022-04-06 23:34:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:34:25,301 INFO L225 Difference]: With dead ends: 219 [2022-04-06 23:34:25,301 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 23:34:25,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=118, Invalid=386, Unknown=2, NotChecked=0, Total=506 [2022-04-06 23:34:25,301 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 13 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 23:34:25,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 376 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 23:34:25,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 23:34:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-04-06 23:34:25,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 118 states have internal predecessors, (127), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 23:34:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2022-04-06 23:34:25,326 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 124 [2022-04-06 23:34:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:34:25,327 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2022-04-06 23:34:25,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 23:34:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2022-04-06 23:34:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 23:34:25,327 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:34:25,328 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:34:25,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 23:34:25,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 23:34:25,543 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:34:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:34:25,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1927738231, now seen corresponding path program 1 times [2022-04-06 23:34:25,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:34:25,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045583140] [2022-04-06 23:34:25,546 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:34:25,546 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:34:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1927738231, now seen corresponding path program 2 times [2022-04-06 23:34:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:34:25,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123017307] [2022-04-06 23:34:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:34:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:34:25,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:34:25,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442398527] [2022-04-06 23:34:25,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:34:25,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:34:25,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:34:25,556 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 23:34:25,557 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 23:34:25,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:34:25,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:34:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 23:34:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:34:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 23:34:26,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:35:01,486 WARN L232 SmtUtils]: Spent 8.46s on a formula simplification that was a NOOP. DAG size: 437 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:36:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 23:36:33,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:36:33,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123017307] [2022-04-06 23:36:33,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:36:33,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442398527] [2022-04-06 23:36:33,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442398527] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:36:33,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:36:33,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-06 23:36:33,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:36:33,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045583140] [2022-04-06 23:36:33,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045583140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:36:33,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:36:33,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 23:36:33,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668098565] [2022-04-06 23:36:33,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:36:33,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 23:36:33,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:36:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 23:36:33,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:36:33,908 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 23:36:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:36:34,423 INFO L93 Difference]: Finished difference Result 237 states and 276 transitions. [2022-04-06 23:36:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 23:36:34,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 124 [2022-04-06 23:36:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:36:34,425 INFO L225 Difference]: With dead ends: 237 [2022-04-06 23:36:34,425 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 23:36:34,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-04-06 23:36:34,426 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 13 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 23:36:34,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 371 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 23:36:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 23:36:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2022-04-06 23:36:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 118 states have internal predecessors, (127), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 23:36:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2022-04-06 23:36:34,443 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 124 [2022-04-06 23:36:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:36:34,443 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2022-04-06 23:36:34,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 23:36:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2022-04-06 23:36:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 23:36:34,444 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:36:34,444 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:36:34,477 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 23:36:34,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:36:34,659 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:36:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:36:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash -964214553, now seen corresponding path program 17 times [2022-04-06 23:36:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:36:34,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1475975483] [2022-04-06 23:36:34,662 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:36:34,662 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:36:34,662 INFO L85 PathProgramCache]: Analyzing trace with hash -964214553, now seen corresponding path program 18 times [2022-04-06 23:36:34,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:36:34,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088843316] [2022-04-06 23:36:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:36:34,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:36:34,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:36:34,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573443538] [2022-04-06 23:36:34,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:36:34,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:36:34,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:36:34,669 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 23:36:34,670 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 23:36:34,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:36:34,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:36:34,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 23:36:34,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:36:35,203 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:36:35,490 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:36:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 199 proven. 27 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-04-06 23:36:35,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:36:52,838 WARN L855 $PredicateComparison]: unable to prove that (or (let ((.cse4 (= (mod c_main_~p~0 2) 0)) (.cse8 (< c_main_~p~0 0)) (.cse9 (div c_main_~p~0 2))) (let ((.cse7 (< c_main_~d~0 0)) (.cse6 (= (mod c_main_~d~0 2) 0)) (.cse3 (* (+ c_main_~q~0 .cse9 1) c_main_~B~0)) (.cse5 (not .cse8)) (.cse0 (* (- 1) (div c_main_~d~0 2))) (.cse1 (* (+ c_main_~q~0 .cse9) c_main_~B~0)) (.cse2 (and (not .cse4) .cse8))) (and (or (and (or (= c_main_~A~0 (+ (- 1) c_main_~r~0 .cse0 .cse1)) .cse2) (or (= c_main_~A~0 (+ (- 1) .cse3 c_main_~r~0 .cse0)) .cse4 .cse5)) .cse6 (not .cse7)) (or (and .cse7 (not .cse6)) (and (or (= (+ .cse3 c_main_~r~0 .cse0) c_main_~A~0) .cse4 .cse5) (or (= c_main_~A~0 (+ c_main_~r~0 .cse0 .cse1)) .cse2)))))) (not (= (* c_main_~p~0 c_main_~B~0) c_main_~d~0))) is different from true [2022-04-06 23:37:31,195 WARN L232 SmtUtils]: Spent 7.40s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:38:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 168 proven. 15 refuted. 0 times theorem prover too weak. 597 trivial. 1 not checked. [2022-04-06 23:38:59,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:38:59,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088843316] [2022-04-06 23:38:59,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:38:59,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573443538] [2022-04-06 23:38:59,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573443538] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:38:59,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:38:59,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2022-04-06 23:38:59,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:38:59,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1475975483] [2022-04-06 23:38:59,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1475975483] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:38:59,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:38:59,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 23:38:59,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583419218] [2022-04-06 23:38:59,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:38:59,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 23:38:59,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:38:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 23:38:59,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=264, Unknown=1, NotChecked=34, Total=380 [2022-04-06 23:38:59,040 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:38:59,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:38:59,894 INFO L93 Difference]: Finished difference Result 207 states and 234 transitions. [2022-04-06 23:38:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 23:38:59,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 128 [2022-04-06 23:38:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:38:59,896 INFO L225 Difference]: With dead ends: 207 [2022-04-06 23:38:59,896 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 23:38:59,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 231 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=94, Invalid=329, Unknown=1, NotChecked=38, Total=462 [2022-04-06 23:38:59,896 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 23:38:59,897 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 224 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 23:38:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 23:38:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2022-04-06 23:38:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 124 states have internal predecessors, (133), 42 states have call successors, (42), 28 states have call predecessors, (42), 27 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 23:38:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 215 transitions. [2022-04-06 23:38:59,916 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 215 transitions. Word has length 128 [2022-04-06 23:38:59,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:38:59,917 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 215 transitions. [2022-04-06 23:38:59,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 23:38:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 215 transitions. [2022-04-06 23:38:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 23:38:59,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:38:59,918 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:38:59,934 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 23:39:00,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:39:00,123 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:39:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:39:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1349759516, now seen corresponding path program 7 times [2022-04-06 23:39:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:39:00,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892516839] [2022-04-06 23:39:00,126 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:39:00,126 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:39:00,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1349759516, now seen corresponding path program 8 times [2022-04-06 23:39:00,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:39:00,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960511339] [2022-04-06 23:39:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:39:00,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:39:00,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:39:00,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574450947] [2022-04-06 23:39:00,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:39:00,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:39:00,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:39:00,142 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 23:39:00,176 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 23:39:00,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:39:00,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:39:00,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 23:39:00,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:39:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 23:39:00,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:39:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 23:39:17,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:39:17,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960511339] [2022-04-06 23:39:17,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:39:17,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574450947] [2022-04-06 23:39:17,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574450947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:39:17,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:39:17,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2022-04-06 23:39:17,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:39:17,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892516839] [2022-04-06 23:39:17,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892516839] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:39:17,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:39:17,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 23:39:17,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915756103] [2022-04-06 23:39:17,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:39:17,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 23:39:17,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:39:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 23:39:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-04-06 23:39:17,800 INFO L87 Difference]: Start difference. First operand 192 states and 215 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 23:39:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:39:18,322 INFO L93 Difference]: Finished difference Result 230 states and 263 transitions. [2022-04-06 23:39:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 23:39:18,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 135 [2022-04-06 23:39:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:39:18,323 INFO L225 Difference]: With dead ends: 230 [2022-04-06 23:39:18,323 INFO L226 Difference]: Without dead ends: 204 [2022-04-06 23:39:18,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 245 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-04-06 23:39:18,324 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 9 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 23:39:18,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 23:39:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-04-06 23:39:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-04-06 23:39:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 131 states have internal predecessors, (140), 45 states have call successors, (45), 29 states have call predecessors, (45), 28 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 23:39:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 228 transitions. [2022-04-06 23:39:18,346 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 228 transitions. Word has length 135 [2022-04-06 23:39:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:39:18,346 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 228 transitions. [2022-04-06 23:39:18,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 23:39:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 228 transitions. [2022-04-06 23:39:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 23:39:18,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:39:18,347 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:39:18,374 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 23:39:18,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:39:18,564 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:39:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:39:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1372391770, now seen corresponding path program 3 times [2022-04-06 23:39:18,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:39:18,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557050008] [2022-04-06 23:39:18,566 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:39:18,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:39:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1372391770, now seen corresponding path program 4 times [2022-04-06 23:39:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:39:18,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007039902] [2022-04-06 23:39:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:39:18,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:39:18,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:39:18,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43494078] [2022-04-06 23:39:18,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:39:18,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:39:18,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:39:18,573 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 23:39:18,575 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 23:39:18,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:39:18,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:39:18,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 23:39:18,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:39:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 23:39:19,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:39:19,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:39:19,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007039902] [2022-04-06 23:39:19,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:39:19,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43494078] [2022-04-06 23:39:19,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43494078] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 23:39:19,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:39:19,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 23:39:19,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:39:19,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557050008] [2022-04-06 23:39:19,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557050008] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:39:19,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:39:19,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 23:39:19,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090952844] [2022-04-06 23:39:19,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:39:19,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 23:39:19,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:39:19,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 23:39:19,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-04-06 23:39:19,722 INFO L87 Difference]: Start difference. First operand 203 states and 228 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 23:39:20,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:39:20,183 INFO L93 Difference]: Finished difference Result 239 states and 274 transitions. [2022-04-06 23:39:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 23:39:20,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 135 [2022-04-06 23:39:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:39:20,185 INFO L225 Difference]: With dead ends: 239 [2022-04-06 23:39:20,185 INFO L226 Difference]: Without dead ends: 213 [2022-04-06 23:39:20,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-04-06 23:39:20,185 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 9 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 23:39:20,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 351 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 23:39:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-06 23:39:20,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 201. [2022-04-06 23:39:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 130 states have internal predecessors, (138), 45 states have call successors, (45), 29 states have call predecessors, (45), 28 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 23:39:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 226 transitions. [2022-04-06 23:39:20,207 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 226 transitions. Word has length 135 [2022-04-06 23:39:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:39:20,208 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 226 transitions. [2022-04-06 23:39:20,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 23:39:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 226 transitions. [2022-04-06 23:39:20,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-04-06 23:39:20,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:39:20,208 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:39:20,228 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 23:39:20,416 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:39:20,416 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:39:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:39:20,417 INFO L85 PathProgramCache]: Analyzing trace with hash 66667591, now seen corresponding path program 1 times [2022-04-06 23:39:20,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:39:20,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [644458448] [2022-04-06 23:39:20,418 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:39:20,419 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:39:20,419 INFO L85 PathProgramCache]: Analyzing trace with hash 66667591, now seen corresponding path program 2 times [2022-04-06 23:39:20,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:39:20,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822210509] [2022-04-06 23:39:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:39:20,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:39:20,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:39:20,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530788153] [2022-04-06 23:39:20,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:39:20,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:39:20,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:39:20,426 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 23:39:20,426 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 23:39:20,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:39:20,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:39:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 23:39:20,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:39:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 23:39:21,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:39:26,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:39:26,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822210509] [2022-04-06 23:39:26,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:39:26,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530788153] [2022-04-06 23:39:26,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530788153] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 23:39:26,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:39:26,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 23:39:26,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:39:26,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [644458448] [2022-04-06 23:39:26,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [644458448] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:39:26,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:39:26,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 23:39:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461011486] [2022-04-06 23:39:26,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:39:26,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 23:39:26,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:39:26,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 23:39:26,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-04-06 23:39:26,789 INFO L87 Difference]: Start difference. First operand 201 states and 226 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-04-06 23:39:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:39:27,152 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2022-04-06 23:39:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 23:39:27,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 140 [2022-04-06 23:39:27,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:39:27,153 INFO L225 Difference]: With dead ends: 208 [2022-04-06 23:39:27,153 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 23:39:27,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-04-06 23:39:27,154 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 17 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:39:27,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 439 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:39:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 23:39:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-04-06 23:39:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 97 states have (on average 1.092783505154639) internal successors, (106), 98 states have internal predecessors, (106), 34 states have call successors, (34), 23 states have call predecessors, (34), 22 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 23:39:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2022-04-06 23:39:27,168 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 140 [2022-04-06 23:39:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:39:27,168 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2022-04-06 23:39:27,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-04-06 23:39:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2022-04-06 23:39:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 23:39:27,169 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:39:27,169 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:39:27,188 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 23:39:27,383 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,SelfDestructingSolverStorable22 [2022-04-06 23:39:27,385 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:39:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:39:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1044299320, now seen corresponding path program 19 times [2022-04-06 23:39:27,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:39:27,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1296397107] [2022-04-06 23:39:27,388 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:39:27,388 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:39:27,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1044299320, now seen corresponding path program 20 times [2022-04-06 23:39:27,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:39:27,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932435340] [2022-04-06 23:39:27,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:39:27,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:39:27,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:39:27,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864143572] [2022-04-06 23:39:27,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:39:27,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:39:27,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:39:27,394 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 23:39:27,395 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 23:39:27,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:39:27,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:39:27,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 23:39:27,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:39:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 254 proven. 5 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2022-04-06 23:39:28,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:39:29,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:39:29,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932435340] [2022-04-06 23:39:29,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:39:29,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864143572] [2022-04-06 23:39:29,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864143572] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 23:39:29,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:39:29,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 23:39:29,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:39:29,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1296397107] [2022-04-06 23:39:29,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1296397107] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:39:29,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:39:29,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 23:39:29,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578075583] [2022-04-06 23:39:29,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:39:29,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 23:39:29,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:39:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 23:39:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:39:29,091 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2022-04-06 23:39:29,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:39:29,385 INFO L93 Difference]: Finished difference Result 246 states and 292 transitions. [2022-04-06 23:39:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 23:39:29,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 141 [2022-04-06 23:39:29,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:39:29,386 INFO L225 Difference]: With dead ends: 246 [2022-04-06 23:39:29,386 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 23:39:29,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-04-06 23:39:29,387 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 42 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:39:29,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 256 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:39:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 23:39:29,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2022-04-06 23:39:29,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 90 states have internal predecessors, (94), 30 states have call successors, (30), 22 states have call predecessors, (30), 21 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 23:39:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2022-04-06 23:39:29,401 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 141 [2022-04-06 23:39:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:39:29,401 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2022-04-06 23:39:29,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2022-04-06 23:39:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2022-04-06 23:39:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 23:39:29,402 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:39:29,402 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:39:29,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 23:39:29,615 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,SelfDestructingSolverStorable23 [2022-04-06 23:39:29,616 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:39:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:39:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash -644644422, now seen corresponding path program 3 times [2022-04-06 23:39:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:39:29,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322658635] [2022-04-06 23:39:29,622 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:39:29,622 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:39:29,622 INFO L85 PathProgramCache]: Analyzing trace with hash -644644422, now seen corresponding path program 4 times [2022-04-06 23:39:29,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:39:29,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917149167] [2022-04-06 23:39:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:39:29,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:39:29,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:39:29,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447127193] [2022-04-06 23:39:29,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:39:29,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:39:29,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:39:29,628 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 23:39:29,629 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 23:39:29,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:39:29,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:39:29,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 23:39:29,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:39:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 42 proven. 71 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 23:39:30,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:40:00,105 WARN L232 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 429 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:41:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 42 proven. 71 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 23:41:43,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:41:43,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917149167] [2022-04-06 23:41:43,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:41:43,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447127193] [2022-04-06 23:41:43,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447127193] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:41:43,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:41:43,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-04-06 23:41:43,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:41:43,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322658635] [2022-04-06 23:41:43,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322658635] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:41:43,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:41:43,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 23:41:43,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039004869] [2022-04-06 23:41:43,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:41:43,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 23:41:43,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:41:43,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 23:41:43,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=345, Unknown=3, NotChecked=0, Total=462 [2022-04-06 23:41:43,957 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-04-06 23:41:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:41:44,703 INFO L93 Difference]: Finished difference Result 173 states and 191 transitions. [2022-04-06 23:41:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 23:41:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 141 [2022-04-06 23:41:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:41:44,705 INFO L225 Difference]: With dead ends: 173 [2022-04-06 23:41:44,705 INFO L226 Difference]: Without dead ends: 165 [2022-04-06 23:41:44,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 258 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=118, Invalid=385, Unknown=3, NotChecked=0, Total=506 [2022-04-06 23:41:44,706 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 10 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 23:41:44,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 339 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 23:41:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-04-06 23:41:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 154. [2022-04-06 23:41:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 99 states have internal predecessors, (104), 32 states have call successors, (32), 24 states have call predecessors, (32), 23 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 23:41:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 166 transitions. [2022-04-06 23:41:44,722 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 166 transitions. Word has length 141 [2022-04-06 23:41:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:41:44,722 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 166 transitions. [2022-04-06 23:41:44,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-04-06 23:41:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 166 transitions. [2022-04-06 23:41:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-04-06 23:41:44,722 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:41:44,723 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:41:44,744 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 23:41:44,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:41:44,935 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:41:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:41:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash -22537335, now seen corresponding path program 5 times [2022-04-06 23:41:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:41:44,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [486309071] [2022-04-06 23:41:44,937 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:41:44,937 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:41:44,937 INFO L85 PathProgramCache]: Analyzing trace with hash -22537335, now seen corresponding path program 6 times [2022-04-06 23:41:44,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:41:44,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975116435] [2022-04-06 23:41:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:41:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:41:44,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:41:44,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143020203] [2022-04-06 23:41:44,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:41:44,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:41:44,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:41:44,950 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 23:41:44,950 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 23:41:45,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:41:45,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:41:45,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 23:41:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:41:45,527 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:41:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 219 proven. 52 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2022-04-06 23:41:46,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:41:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 957 trivial. 0 not checked. [2022-04-06 23:41:47,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:41:47,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975116435] [2022-04-06 23:41:47,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:41:47,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143020203] [2022-04-06 23:41:47,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143020203] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:41:47,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:41:47,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-04-06 23:41:47,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:41:47,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [486309071] [2022-04-06 23:41:47,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [486309071] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:41:47,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:41:47,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 23:41:47,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414374189] [2022-04-06 23:41:47,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:41:47,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 23:41:47,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:41:47,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 23:41:47,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-04-06 23:41:47,008 INFO L87 Difference]: Start difference. First operand 154 states and 166 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 23:41:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:41:48,014 INFO L93 Difference]: Finished difference Result 176 states and 199 transitions. [2022-04-06 23:41:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 23:41:48,014 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 152 [2022-04-06 23:41:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:41:48,015 INFO L225 Difference]: With dead ends: 176 [2022-04-06 23:41:48,015 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 23:41:48,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-04-06 23:41:48,016 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 23:41:48,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 198 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 226 Invalid, 0 Unknown, 144 Unchecked, 0.9s Time] [2022-04-06 23:41:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 23:41:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2022-04-06 23:41:48,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 108 states have (on average 1.0925925925925926) internal successors, (118), 110 states have internal predecessors, (118), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 23:41:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 194 transitions. [2022-04-06 23:41:48,050 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 194 transitions. Word has length 152 [2022-04-06 23:41:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:41:48,051 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 194 transitions. [2022-04-06 23:41:48,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 23:41:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 194 transitions. [2022-04-06 23:41:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-04-06 23:41:48,051 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:41:48,051 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:41:48,068 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 23:41:48,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:41:48,260 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:41:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:41:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash 451390533, now seen corresponding path program 5 times [2022-04-06 23:41:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:41:48,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [152341980] [2022-04-06 23:41:48,262 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:41:48,262 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:41:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash 451390533, now seen corresponding path program 6 times [2022-04-06 23:41:48,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:41:48,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96913057] [2022-04-06 23:41:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:41:48,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:41:48,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:41:48,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80425731] [2022-04-06 23:41:48,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:41:48,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:41:48,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:41:48,268 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 23:41:48,270 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 23:41:48,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 23:41:48,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:41:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 23:41:48,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:41:49,150 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful