/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/loops/invert_string-3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:45:57,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:45:57,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:45:57,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:45:57,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:45:57,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:45:57,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:45:57,656 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:45:57,663 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:45:57,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:45:57,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:45:57,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:45:57,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:45:57,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:45:57,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:45:57,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:45:57,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:45:57,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:45:57,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:45:57,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:45:57,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:45:57,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:45:57,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:45:57,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:45:57,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:45:57,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:45:57,667 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:45:57,667 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:45:57,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:45:57,667 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:45:57,667 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:45:57,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:45:57,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:45:57,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:45:57,859 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:45:57,860 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:45:57,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-3.c [2022-03-20 17:45:57,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f83dbd93/1bbc317d6b434fd9bced0e030f269511/FLAG2628ab147 [2022-03-20 17:45:58,227 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:45:58,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-3.c [2022-03-20 17:45:58,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f83dbd93/1bbc317d6b434fd9bced0e030f269511/FLAG2628ab147 [2022-03-20 17:45:58,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f83dbd93/1bbc317d6b434fd9bced0e030f269511 [2022-03-20 17:45:58,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:45:58,243 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:45:58,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:45:58,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:45:58,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:45:58,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:45:58" (1/1) ... [2022-03-20 17:45:58,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b0e189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58, skipping insertion in model container [2022-03-20 17:45:58,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:45:58" (1/1) ... [2022-03-20 17:45:58,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:45:58,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:45:58,394 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-3.c[327,340] [2022-03-20 17:45:58,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:45:58,417 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:45:58,427 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-3.c[327,340] [2022-03-20 17:45:58,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:45:58,454 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:45:58,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58 WrapperNode [2022-03-20 17:45:58,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:45:58,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:45:58,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:45:58,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:45:58,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58" (1/1) ... [2022-03-20 17:45:58,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58" (1/1) ... [2022-03-20 17:45:58,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58" (1/1) ... [2022-03-20 17:45:58,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58" (1/1) ... [2022-03-20 17:45:58,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58" (1/1) ... [2022-03-20 17:45:58,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58" (1/1) ... [2022-03-20 17:45:58,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58" (1/1) ... [2022-03-20 17:45:58,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:45:58,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:45:58,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:45:58,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:45:58,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58" (1/1) ... [2022-03-20 17:45:58,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:45:58,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:58,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:45:58,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:45:58,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:45:58,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:45:58,560 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:45:58,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:45:58,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:45:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:45:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:45:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:45:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:45:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:45:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 17:45:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:45:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 17:45:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:45:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:45:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:45:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:45:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:45:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:45:58,623 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:45:58,624 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:45:58,776 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:45:58,780 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:45:58,780 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 17:45:58,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:45:58 BoogieIcfgContainer [2022-03-20 17:45:58,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:45:58,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:45:58,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:45:58,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:45:58,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:45:58" (1/3) ... [2022-03-20 17:45:58,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e2cd91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:45:58, skipping insertion in model container [2022-03-20 17:45:58,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:45:58" (2/3) ... [2022-03-20 17:45:58,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23e2cd91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:45:58, skipping insertion in model container [2022-03-20 17:45:58,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:45:58" (3/3) ... [2022-03-20 17:45:58,788 INFO L111 eAbstractionObserver]: Analyzing ICFG invert_string-3.c [2022-03-20 17:45:58,791 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:45:58,791 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:45:58,833 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:45:58,837 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:45:58,837 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:45:58,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:45:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 17:45:58,855 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:58,855 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:45:58,855 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:58,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:58,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1728321422, now seen corresponding path program 1 times [2022-03-20 17:45:58,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:58,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574032869] [2022-03-20 17:45:58,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:45:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1728321422, now seen corresponding path program 2 times [2022-03-20 17:45:58,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:58,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351416539] [2022-03-20 17:45:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:58,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:59,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:45:59,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:59,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351416539] [2022-03-20 17:45:59,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351416539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:59,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:59,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:45:59,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:59,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574032869] [2022-03-20 17:45:59,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574032869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:59,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:59,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:45:59,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097518404] [2022-03-20 17:45:59,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:59,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:45:59,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:59,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:45:59,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:45:59,201 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:59,300 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-03-20 17:45:59,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:45:59,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 17:45:59,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:59,307 INFO L225 Difference]: With dead ends: 48 [2022-03-20 17:45:59,307 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 17:45:59,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-20 17:45:59,319 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:45:59,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 35 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:45:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 17:45:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-20 17:45:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:45:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-20 17:45:59,346 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2022-03-20 17:45:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:59,347 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-20 17:45:59,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-20 17:45:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 17:45:59,347 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:59,348 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:45:59,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:45:59,348 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1238871028, now seen corresponding path program 1 times [2022-03-20 17:45:59,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:59,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1326187303] [2022-03-20 17:45:59,354 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:59,354 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:59,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1238871028, now seen corresponding path program 2 times [2022-03-20 17:45:59,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:59,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416779885] [2022-03-20 17:45:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:59,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:59,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:59,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:59,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416779885] [2022-03-20 17:45:59,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416779885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:59,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:59,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:45:59,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:45:59,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1326187303] [2022-03-20 17:45:59,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1326187303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:45:59,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:45:59,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 17:45:59,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242719033] [2022-03-20 17:45:59,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:45:59,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 17:45:59,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:59,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 17:45:59,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 17:45:59,496 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:45:59,572 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-20 17:45:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 17:45:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-20 17:45:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:45:59,573 INFO L225 Difference]: With dead ends: 40 [2022-03-20 17:45:59,573 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 17:45:59,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 17:45:59,575 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:45:59,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:45:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 17:45:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-20 17:45:59,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:45:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-20 17:45:59,581 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-03-20 17:45:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:45:59,582 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-20 17:45:59,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:45:59,582 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-20 17:45:59,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 17:45:59,582 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:45:59,582 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:45:59,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:45:59,583 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:45:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:45:59,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1304082102, now seen corresponding path program 1 times [2022-03-20 17:45:59,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:45:59,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [54635564] [2022-03-20 17:45:59,585 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:45:59,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:45:59,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1304082102, now seen corresponding path program 2 times [2022-03-20 17:45:59,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:45:59,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515268708] [2022-03-20 17:45:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:45:59,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:45:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:59,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:45:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:45:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:45:59,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:45:59,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515268708] [2022-03-20 17:45:59,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515268708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:45:59,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176694929] [2022-03-20 17:45:59,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:45:59,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:45:59,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:45:59,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:45:59,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 17:45:59,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:45:59,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:45:59,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 17:45:59,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:45:59,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:45:59,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-03-20 17:46:00,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:00,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:00,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 10 [2022-03-20 17:46:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:00,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:00,433 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:00,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-20 17:46:00,464 INFO L356 Elim1Store]: treesize reduction 26, result has 39.5 percent of original size [2022-03-20 17:46:00,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 102 [2022-03-20 17:46:00,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:00,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-20 17:46:00,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 17:46:00,519 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:00,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-20 17:46:00,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:00,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-20 17:46:00,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-20 17:46:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:00,559 INFO L356 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-03-20 17:46:00,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 89 [2022-03-20 17:46:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:00,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176694929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:00,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:00,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 10] total 19 [2022-03-20 17:46:00,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:00,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [54635564] [2022-03-20 17:46:00,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [54635564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:00,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:00,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 17:46:00,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661741934] [2022-03-20 17:46:00,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:00,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 17:46:00,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:00,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 17:46:00,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-20 17:46:00,806 INFO L87 Difference]: Start difference. First operand 24 states and 26 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:00,871 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-20 17:46:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 17:46:00,871 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 17:46:00,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:00,872 INFO L225 Difference]: With dead ends: 42 [2022-03-20 17:46:00,872 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 17:46:00,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-20 17:46:00,873 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:00,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 33 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 17:46:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 17:46:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-03-20 17:46:00,878 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2022-03-20 17:46:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:00,878 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-03-20 17:46:00,879 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-03-20 17:46:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 17:46:00,879 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:00,879 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:00,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:01,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:01,096 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:01,097 INFO L85 PathProgramCache]: Analyzing trace with hash 452585224, now seen corresponding path program 3 times [2022-03-20 17:46:01,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:01,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [726373712] [2022-03-20 17:46:01,098 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:01,098 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash 452585224, now seen corresponding path program 4 times [2022-03-20 17:46:01,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:01,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331348037] [2022-03-20 17:46:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:01,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:01,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:01,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331348037] [2022-03-20 17:46:01,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331348037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557567713] [2022-03-20 17:46:01,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:01,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:01,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:01,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:01,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 17:46:01,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:01,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 17:46:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:01,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:01,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-03-20 17:46:01,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:01,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:01,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 10 [2022-03-20 17:46:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:46:01,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:01,791 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:01,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-20 17:46:01,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:01,825 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-20 17:46:01,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 42 [2022-03-20 17:46:01,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:01,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-20 17:46:01,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 17:46:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:01,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 17 [2022-03-20 17:46:01,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 17:46:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:01,880 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-20 17:46:01,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 42 [2022-03-20 17:46:01,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:01,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-20 17:46:01,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:01,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:01,939 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:01,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-20 17:46:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:01,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2022-03-20 17:46:01,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-20 17:46:01,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:01,978 INFO L356 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-03-20 17:46:01,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 39 [2022-03-20 17:46:01,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:01,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-20 17:46:02,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:02,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:02,014 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-03-20 17:46:02,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 1 [2022-03-20 17:46:02,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:02,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-20 17:46:02,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 17:46:02,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557567713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:02,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:02,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 10] total 20 [2022-03-20 17:46:02,182 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [726373712] [2022-03-20 17:46:02,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [726373712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:02,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:02,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:02,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730404883] [2022-03-20 17:46:02,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:02,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:46:02,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:02,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:46:02,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:46:02,183 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:02,266 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-03-20 17:46:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:46:02,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 17:46:02,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:02,267 INFO L225 Difference]: With dead ends: 44 [2022-03-20 17:46:02,267 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 17:46:02,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:46:02,268 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:02,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 33 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:02,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 17:46:02,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-20 17:46:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-20 17:46:02,273 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2022-03-20 17:46:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:02,273 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-20 17:46:02,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-20 17:46:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 17:46:02,273 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:02,274 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:02,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:02,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 17:46:02,487 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:02,488 INFO L85 PathProgramCache]: Analyzing trace with hash 687738182, now seen corresponding path program 5 times [2022-03-20 17:46:02,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:02,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768611198] [2022-03-20 17:46:02,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:02,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 687738182, now seen corresponding path program 6 times [2022-03-20 17:46:02,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:02,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16527867] [2022-03-20 17:46:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:02,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:02,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:02,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16527867] [2022-03-20 17:46:02,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16527867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634161333] [2022-03-20 17:46:02,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:02,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:02,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:02,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:02,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 17:46:02,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 17:46:02,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:02,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 17:46:02,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:02,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:02,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-20 17:46:02,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:02,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2022-03-20 17:46:02,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:02,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:02,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2022-03-20 17:46:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 17:46:03,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:03,282 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-03-20 17:46:03,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 564 treesize of output 1 [2022-03-20 17:46:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 17:46:03,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634161333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:03,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:03,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 22 [2022-03-20 17:46:03,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:03,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768611198] [2022-03-20 17:46:03,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768611198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:03,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:03,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:46:03,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121017146] [2022-03-20 17:46:03,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:03,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 17:46:03,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 17:46:03,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:46:03,304 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:03,403 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-03-20 17:46:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:46:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 17:46:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:03,404 INFO L225 Difference]: With dead ends: 46 [2022-03-20 17:46:03,404 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 17:46:03,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:46:03,405 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:03,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 17:46:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-20 17:46:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-20 17:46:03,409 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2022-03-20 17:46:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:03,410 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-20 17:46:03,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-20 17:46:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 17:46:03,410 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:03,410 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:03,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:03,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:03,611 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:03,611 INFO L85 PathProgramCache]: Analyzing trace with hash -963535868, now seen corresponding path program 7 times [2022-03-20 17:46:03,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:03,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [109706390] [2022-03-20 17:46:03,612 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:03,612 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash -963535868, now seen corresponding path program 8 times [2022-03-20 17:46:03,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:03,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031850824] [2022-03-20 17:46:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:03,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:03,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:03,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031850824] [2022-03-20 17:46:03,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031850824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:03,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192621995] [2022-03-20 17:46:03,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:03,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:03,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:03,727 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:03,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 17:46:03,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:03,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 17:46:03,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:03,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:03,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-20 17:46:03,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:03,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2022-03-20 17:46:04,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:04,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:04,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2022-03-20 17:46:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 17:46:04,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:04,510 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-03-20 17:46:04,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 564 treesize of output 1 [2022-03-20 17:46:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 17:46:04,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192621995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:04,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:04,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 23 [2022-03-20 17:46:04,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:04,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [109706390] [2022-03-20 17:46:04,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [109706390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:04,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:04,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:04,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628295628] [2022-03-20 17:46:04,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:04,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:46:04,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:46:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:46:04,529 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:04,699 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-03-20 17:46:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:46:04,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 17:46:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:04,700 INFO L225 Difference]: With dead ends: 48 [2022-03-20 17:46:04,700 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 17:46:04,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-03-20 17:46:04,702 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:04,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 43 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:04,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 17:46:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-20 17:46:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-03-20 17:46:04,707 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2022-03-20 17:46:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:04,707 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-03-20 17:46:04,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-03-20 17:46:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 17:46:04,708 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:04,708 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:04,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 17:46:04,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:04,911 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:04,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1300001602, now seen corresponding path program 9 times [2022-03-20 17:46:04,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:04,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [367369983] [2022-03-20 17:46:04,913 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:04,913 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:04,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1300001602, now seen corresponding path program 10 times [2022-03-20 17:46:04,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:04,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875241259] [2022-03-20 17:46:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:04,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:05,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:05,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:05,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875241259] [2022-03-20 17:46:05,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875241259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:05,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382461226] [2022-03-20 17:46:05,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:05,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:05,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:05,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:05,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 17:46:05,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:05,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 17:46:05,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:05,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:05,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-03-20 17:46:05,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:05,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:05,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 10 [2022-03-20 17:46:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:05,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:05,692 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:05,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-20 17:46:05,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-20 17:46:05,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 17:46:05,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-20 17:46:05,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,727 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-20 17:46:05,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 42 [2022-03-20 17:46:05,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2022-03-20 17:46:05,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,758 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-20 17:46:05,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 84 [2022-03-20 17:46:05,789 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:05,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-20 17:46:05,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,805 INFO L356 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-03-20 17:46:05,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 39 [2022-03-20 17:46:05,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-20 17:46:05,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-20 17:46:05,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-20 17:46:05,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-20 17:46:05,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2022-03-20 17:46:05,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:05,866 INFO L356 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-03-20 17:46:05,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 79 [2022-03-20 17:46:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:05,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382461226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:05,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:05,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 10] total 20 [2022-03-20 17:46:05,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:05,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [367369983] [2022-03-20 17:46:05,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [367369983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:05,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:05,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:05,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148224786] [2022-03-20 17:46:05,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:05,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:46:05,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:05,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:46:05,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:46:05,983 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:06,065 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-03-20 17:46:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 17:46:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 17:46:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:06,066 INFO L225 Difference]: With dead ends: 46 [2022-03-20 17:46:06,066 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 17:46:06,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:46:06,067 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:06,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 28 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:06,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 17:46:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 17:46:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-03-20 17:46:06,072 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2022-03-20 17:46:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:06,072 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-03-20 17:46:06,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-03-20 17:46:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 17:46:06,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:06,073 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:06,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:06,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:06,289 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash -537357632, now seen corresponding path program 11 times [2022-03-20 17:46:06,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:06,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1400940740] [2022-03-20 17:46:06,291 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:06,291 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:06,291 INFO L85 PathProgramCache]: Analyzing trace with hash -537357632, now seen corresponding path program 12 times [2022-03-20 17:46:06,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:06,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735160583] [2022-03-20 17:46:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:06,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:06,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:06,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:06,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735160583] [2022-03-20 17:46:06,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735160583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:06,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222165358] [2022-03-20 17:46:06,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:06,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:06,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:06,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:06,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 17:46:06,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 17:46:06,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:06,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 17:46:06,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:06,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:06,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-20 17:46:06,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:06,931 INFO L356 Elim1Store]: treesize reduction 12, result has 20.0 percent of original size [2022-03-20 17:46:06,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2022-03-20 17:46:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:06,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:07,139 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:07,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-20 17:46:07,180 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-03-20 17:46:07,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-03-20 17:46:07,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-20 17:46:07,197 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-03-20 17:46:07,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 47 [2022-03-20 17:46:07,209 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:07,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-20 17:46:07,255 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-03-20 17:46:07,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-03-20 17:46:07,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 17:46:07,274 INFO L356 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-03-20 17:46:07,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 49 [2022-03-20 17:46:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:07,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222165358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:07,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:07,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 26 [2022-03-20 17:46:07,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:07,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1400940740] [2022-03-20 17:46:07,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1400940740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:07,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:07,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:07,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54122432] [2022-03-20 17:46:07,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:07,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 17:46:07,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:07,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 17:46:07,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:46:07,459 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:07,670 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-03-20 17:46:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 17:46:07,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 17:46:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:07,671 INFO L225 Difference]: With dead ends: 48 [2022-03-20 17:46:07,671 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 17:46:07,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:46:07,672 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:07,672 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 17:46:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-20 17:46:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-03-20 17:46:07,678 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2022-03-20 17:46:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:07,678 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-03-20 17:46:07,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-03-20 17:46:07,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 17:46:07,679 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:07,679 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:07,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:07,896 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:07,897 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:07,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1008022850, now seen corresponding path program 13 times [2022-03-20 17:46:07,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:07,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1759368376] [2022-03-20 17:46:07,898 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:07,898 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:07,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1008022850, now seen corresponding path program 14 times [2022-03-20 17:46:07,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:07,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233377064] [2022-03-20 17:46:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:07,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:08,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:08,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:08,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233377064] [2022-03-20 17:46:08,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233377064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813477621] [2022-03-20 17:46:08,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:08,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:08,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:08,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:08,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 17:46:08,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:08,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:08,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 17:46:08,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:08,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:08,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-20 17:46:08,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:08,718 INFO L356 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2022-03-20 17:46:08,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 13 [2022-03-20 17:46:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:08,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:08,960 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:08,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-20 17:46:09,024 INFO L356 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-03-20 17:46:09,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-03-20 17:46:09,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-20 17:46:09,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-20 17:46:09,044 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:09,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-20 17:46:09,153 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-20 17:46:09,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-03-20 17:46:09,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-20 17:46:09,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 17:46:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:09,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813477621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:09,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:09,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 31 [2022-03-20 17:46:09,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:09,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1759368376] [2022-03-20 17:46:09,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1759368376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:09,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:09,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:46:09,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905980679] [2022-03-20 17:46:09,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:09,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:46:09,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:09,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:46:09,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-20 17:46:09,463 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:09,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:09,733 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-03-20 17:46:09,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:46:09,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 17:46:09,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:09,734 INFO L225 Difference]: With dead ends: 50 [2022-03-20 17:46:09,734 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 17:46:09,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 17:46:09,735 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:09,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 43 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:09,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 17:46:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-03-20 17:46:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-03-20 17:46:09,743 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2022-03-20 17:46:09,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:09,743 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-03-20 17:46:09,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:09,743 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-03-20 17:46:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 17:46:09,744 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:09,744 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:09,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:09,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:09,967 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:09,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:09,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1949236028, now seen corresponding path program 15 times [2022-03-20 17:46:09,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:09,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407051991] [2022-03-20 17:46:09,969 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:09,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:09,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1949236028, now seen corresponding path program 16 times [2022-03-20 17:46:09,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:09,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023486508] [2022-03-20 17:46:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:09,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:10,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:10,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:10,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023486508] [2022-03-20 17:46:10,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023486508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:10,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924598689] [2022-03-20 17:46:10,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:10,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:10,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:10,197 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:10,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 17:46:10,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:10,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:10,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 17:46:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:10,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:10,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-20 17:46:10,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:10,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:10,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 10 [2022-03-20 17:46:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:11,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:11,231 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:11,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-20 17:46:11,246 INFO L356 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-03-20 17:46:11,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 101 [2022-03-20 17:46:11,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:11,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-20 17:46:11,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 17:46:11,315 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:11,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-20 17:46:11,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:11,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-20 17:46:11,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-20 17:46:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:11,351 INFO L356 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-03-20 17:46:11,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 39 [2022-03-20 17:46:11,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:11,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-20 17:46:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:11,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2022-03-20 17:46:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:11,400 INFO L356 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-03-20 17:46:11,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 79 [2022-03-20 17:46:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:12,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924598689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:12,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:12,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 16] total 36 [2022-03-20 17:46:12,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:12,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407051991] [2022-03-20 17:46:12,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407051991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:12,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:12,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:12,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045741282] [2022-03-20 17:46:12,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:12,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:46:12,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:46:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 17:46:12,102 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:12,443 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-03-20 17:46:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:46:12,443 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 17:46:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:12,445 INFO L225 Difference]: With dead ends: 63 [2022-03-20 17:46:12,445 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 17:46:12,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 17:46:12,446 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:12,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 52 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 17:46:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2022-03-20 17:46:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-03-20 17:46:12,453 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2022-03-20 17:46:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:12,454 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-03-20 17:46:12,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-03-20 17:46:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 17:46:12,454 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:12,454 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:12,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:12,666 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,SelfDestructingSolverStorable9 [2022-03-20 17:46:12,667 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:12,667 INFO L85 PathProgramCache]: Analyzing trace with hash 606667834, now seen corresponding path program 17 times [2022-03-20 17:46:12,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:12,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1283581210] [2022-03-20 17:46:12,668 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:12,668 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash 606667834, now seen corresponding path program 18 times [2022-03-20 17:46:12,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:12,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060468162] [2022-03-20 17:46:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:12,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:13,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 17:46:13,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:13,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060468162] [2022-03-20 17:46:13,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060468162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:13,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51582288] [2022-03-20 17:46:13,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:13,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:13,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:13,385 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:13,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 17:46:13,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 17:46:13,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 17:46:13,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:13,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:14,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-20 17:46:14,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:14,480 INFO L356 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2022-03-20 17:46:14,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 13 [2022-03-20 17:46:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 17:46:14,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:14,730 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:14,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-20 17:46:14,773 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-03-20 17:46:14,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-03-20 17:46:14,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-20 17:46:14,790 INFO L356 Elim1Store]: treesize reduction 27, result has 34.1 percent of original size [2022-03-20 17:46:14,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 45 [2022-03-20 17:46:14,799 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:14,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-20 17:46:14,841 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-20 17:46:14,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2022-03-20 17:46:14,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-20 17:46:14,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 17:46:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:15,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51582288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:15,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:15,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 18] total 54 [2022-03-20 17:46:15,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:15,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1283581210] [2022-03-20 17:46:15,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1283581210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:15,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:15,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 17:46:15,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610587834] [2022-03-20 17:46:15,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:15,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 17:46:15,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:15,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 17:46:15,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2504, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 17:46:15,339 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:17,059 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-03-20 17:46:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 17:46:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 17:46:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:17,060 INFO L225 Difference]: With dead ends: 70 [2022-03-20 17:46:17,060 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 17:46:17,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=849, Invalid=5471, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 17:46:17,061 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:17,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 87 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:46:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 17:46:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2022-03-20 17:46:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 17:46:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-03-20 17:46:17,072 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2022-03-20 17:46:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:17,072 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-03-20 17:46:17,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 17:46:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-03-20 17:46:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 17:46:17,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:17,073 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:17,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:17,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:17,279 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:17,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:17,280 INFO L85 PathProgramCache]: Analyzing trace with hash 758259348, now seen corresponding path program 1 times [2022-03-20 17:46:17,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:17,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [958781605] [2022-03-20 17:46:17,281 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:17,281 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:17,282 INFO L85 PathProgramCache]: Analyzing trace with hash 758259348, now seen corresponding path program 2 times [2022-03-20 17:46:17,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:17,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920834397] [2022-03-20 17:46:17,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:17,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:18,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:18,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 17:46:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:18,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920834397] [2022-03-20 17:46:18,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920834397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449072714] [2022-03-20 17:46:18,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 17:46:18,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:18,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:18,353 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:18,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 17:46:18,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 17:46:18,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 17:46:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:18,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:18,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-20 17:46:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:19,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-20 17:46:19,905 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#str2~0.base_BEFORE_CALL_1| Int) (|v_main_~#str1~0.base_BEFORE_CALL_1| Int)) (and (not (= |v_main_~#str2~0.base_BEFORE_CALL_1| |v_main_~#str1~0.base_BEFORE_CALL_1|)) (= (select (select |c_#memory_int| |v_main_~#str2~0.base_BEFORE_CALL_1|) 3) (select (select |c_#memory_int| |v_main_~#str1~0.base_BEFORE_CALL_1|) 1)))) is different from true [2022-03-20 17:46:20,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 17:46:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-03-20 17:46:20,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:20,577 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:20,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 206 [2022-03-20 17:46:20,809 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-20 17:46:20,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-03-20 17:46:20,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 218 [2022-03-20 17:46:20,862 INFO L356 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2022-03-20 17:46:20,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 515 treesize of output 447 [2022-03-20 17:46:21,027 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:21,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 206 [2022-03-20 17:46:21,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:21,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-20 17:46:21,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 96 [2022-03-20 17:46:21,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:21,280 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-03-20 17:46:21,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 256 treesize of output 222 [2022-03-20 17:46:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:22,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449072714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:22,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:22,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 21] total 57 [2022-03-20 17:46:22,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:22,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [958781605] [2022-03-20 17:46:22,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [958781605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:22,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:22,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 17:46:22,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673123263] [2022-03-20 17:46:22,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:22,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 17:46:22,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 17:46:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2693, Unknown=1, NotChecked=108, Total=3192 [2022-03-20 17:46:22,373 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:26,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:26,689 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2022-03-20 17:46:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 17:46:26,690 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-03-20 17:46:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:26,691 INFO L225 Difference]: With dead ends: 130 [2022-03-20 17:46:26,691 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 17:46:26,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3166 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1737, Invalid=9396, Unknown=1, NotChecked=208, Total=11342 [2022-03-20 17:46:26,693 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 295 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:26,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 88 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:46:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 17:46:26,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 59. [2022-03-20 17:46:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 17:46:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-03-20 17:46:26,719 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 43 [2022-03-20 17:46:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:26,720 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-03-20 17:46:26,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-03-20 17:46:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 17:46:26,726 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:26,726 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:26,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:26,932 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,SelfDestructingSolverStorable11 [2022-03-20 17:46:26,932 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1926528494, now seen corresponding path program 3 times [2022-03-20 17:46:26,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:26,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [919199302] [2022-03-20 17:46:26,933 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:26,933 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1926528494, now seen corresponding path program 4 times [2022-03-20 17:46:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:26,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70651056] [2022-03-20 17:46:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:27,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:27,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 17:46:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-20 17:46:27,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:27,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70651056] [2022-03-20 17:46:27,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70651056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:27,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809935493] [2022-03-20 17:46:27,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 17:46:27,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:27,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:27,099 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:27,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 17:46:27,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 17:46:27,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:27,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 17:46:27,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:27,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:27,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-03-20 17:46:27,784 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-03-20 17:46:27,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-20 17:46:30,150 WARN L855 $PredicateComparison]: unable to prove that (exists ((aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172 Int) (|v_main_~#str2~0.base_BEFORE_CALL_3| Int) (aux_div_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172 Int) (aux_div_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119 Int) (aux_div_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154 Int) (|v_main_~#str2~0.offset_BEFORE_CALL_3| Int) (|v_main_~#str1~0.base_BEFORE_CALL_3| Int) (aux_div_v_main_~j~0_BEFORE_CALL_3_56 Int)) (let ((.cse1 (* aux_div_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172 4294967296))) (let ((.cse0 (+ .cse1 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172))) (and (<= .cse0 (+ (* 4294967296 aux_div_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119) 5)) (<= .cse0 (* aux_div_v_main_~j~0_BEFORE_CALL_3_56 4294967296)) (< 0 (+ 4294967291 .cse1 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172)) (< aux_div_v_main_~j~0_BEFORE_CALL_3_56 (+ aux_div_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154 1)) (= (select (select |c_#memory_int| |v_main_~#str1~0.base_BEFORE_CALL_3|) (+ (mod (+ (* 4294967295 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172) 5) 4294967296) (- 4))) (select (select |c_#memory_int| |v_main_~#str2~0.base_BEFORE_CALL_3|) (+ |v_main_~#str2~0.offset_BEFORE_CALL_3| 4))) (<= .cse0 5) (not (= |v_main_~#str2~0.base_BEFORE_CALL_3| |v_main_~#str1~0.base_BEFORE_CALL_3|)) (< aux_div_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119 (+ aux_div_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172 1)) (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172) (<= (* aux_div_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154 4294967296) (+ 4294967290 .cse1 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~j~0_BEFORE_CALL_3_56_119_154_172)))))) is different from true [2022-03-20 17:46:31,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:31,131 INFO L356 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2022-03-20 17:46:31,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 13 [2022-03-20 17:46:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 25 trivial. 2 not checked. [2022-03-20 17:46:31,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:31,615 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:31,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 206 [2022-03-20 17:46:31,867 INFO L356 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-03-20 17:46:31,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-03-20 17:46:31,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 96 [2022-03-20 17:46:31,901 INFO L356 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2022-03-20 17:46:31,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 502 treesize of output 434 [2022-03-20 17:46:31,983 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-03-20 17:46:31,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 201 [2022-03-20 17:46:32,005 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:32,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 206 [2022-03-20 17:46:32,362 INFO L356 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2022-03-20 17:46:32,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 256 treesize of output 234 [2022-03-20 17:46:32,511 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-20 17:46:32,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2022-03-20 17:46:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 17:46:33,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809935493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 17:46:33,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 17:46:33,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 24, 23] total 50 [2022-03-20 17:46:33,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [919199302] [2022-03-20 17:46:33,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [919199302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:33,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:33,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 17:46:33,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840948288] [2022-03-20 17:46:33,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:33,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 17:46:33,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 17:46:33,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2073, Unknown=1, NotChecked=94, Total=2450 [2022-03-20 17:46:33,181 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:33,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:33,487 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-03-20 17:46:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 17:46:33,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-03-20 17:46:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:33,488 INFO L225 Difference]: With dead ends: 83 [2022-03-20 17:46:33,489 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 17:46:33,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=384, Invalid=2699, Unknown=1, NotChecked=108, Total=3192 [2022-03-20 17:46:33,490 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:33,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 30 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:46:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 17:46:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-03-20 17:46:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 17:46:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-03-20 17:46:33,509 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 45 [2022-03-20 17:46:33,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:33,509 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-03-20 17:46:33,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 17:46:33,509 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-03-20 17:46:33,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 17:46:33,509 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:33,509 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:33,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 17:46:33,714 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,SelfDestructingSolverStorable12 [2022-03-20 17:46:33,714 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:33,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash 814759662, now seen corresponding path program 5 times [2022-03-20 17:46:33,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:33,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1889061984] [2022-03-20 17:46:33,715 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 17:46:33,715 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 17:46:33,715 INFO L85 PathProgramCache]: Analyzing trace with hash 814759662, now seen corresponding path program 6 times [2022-03-20 17:46:33,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:33,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265097082] [2022-03-20 17:46:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:33,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:34,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:34,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-20 17:46:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:34,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 17:46:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-20 17:46:34,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:34,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265097082] [2022-03-20 17:46:34,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265097082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 17:46:34,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073874390] [2022-03-20 17:46:34,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 17:46:34,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 17:46:34,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:34,719 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 17:46:34,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 17:46:34,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 17:46:34,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 17:46:34,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 17:46:34,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 17:46:34,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-20 17:46:35,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-03-20 17:46:35,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:35,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-20 17:46:35,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:35,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-03-20 17:46:38,598 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#str2~0.base_BEFORE_CALL_5| Int) (|v_main_~#str1~0.base_BEFORE_CALL_5| Int)) (and (= (select (select |c_#memory_int| |v_main_~#str1~0.base_BEFORE_CALL_5|) 2) (select (select |c_#memory_int| |v_main_~#str2~0.base_BEFORE_CALL_5|) 2)) (not (= |v_main_~#str2~0.base_BEFORE_CALL_5| |v_main_~#str1~0.base_BEFORE_CALL_5|)))) is different from true [2022-03-20 17:46:39,328 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#str1~0.base_BEFORE_CALL_6| Int) (|v_main_~#str2~0.base_BEFORE_CALL_6| Int)) (and (not (= |v_main_~#str2~0.base_BEFORE_CALL_6| |v_main_~#str1~0.base_BEFORE_CALL_6|)) (= (select (select |c_#memory_int| |v_main_~#str1~0.base_BEFORE_CALL_6|) 2) (select (select |c_#memory_int| |v_main_~#str2~0.base_BEFORE_CALL_6|) 2)))) is different from true [2022-03-20 17:46:39,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:39,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 17:46:39,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 17:46:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 8 not checked. [2022-03-20 17:46:39,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 17:46:42,304 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:42,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 964 treesize of output 901 [2022-03-20 17:46:51,963 INFO L356 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2022-03-20 17:46:51,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 759 treesize of output 708 [2022-03-20 17:46:55,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 17:46:55,212 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 17:46:55,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 6026 treesize of output 5443 [2022-03-20 17:46:55,290 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-20 17:46:55,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 17:46:55,491 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,SelfDestructingSolverStorable13 [2022-03-20 17:46:55,491 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:496) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:635) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.runStrategy(AcceleratedInterpolationCore.java:300) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:275) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-20 17:46:55,495 INFO L158 Benchmark]: Toolchain (without parser) took 57251.62ms. Allocated memory was 177.2MB in the beginning and 376.4MB in the end (delta: 199.2MB). Free memory was 129.2MB in the beginning and 203.9MB in the end (delta: -74.7MB). Peak memory consumption was 203.8MB. Max. memory is 8.0GB. [2022-03-20 17:46:55,495 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 177.2MB. Free memory was 145.4MB in the beginning and 145.3MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 17:46:55,495 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.01ms. Allocated memory is still 177.2MB. Free memory was 128.9MB in the beginning and 153.8MB in the end (delta: -24.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 17:46:55,495 INFO L158 Benchmark]: Boogie Preprocessor took 39.40ms. Allocated memory is still 177.2MB. Free memory was 153.8MB in the beginning and 152.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 17:46:55,496 INFO L158 Benchmark]: RCFGBuilder took 286.34ms. Allocated memory is still 177.2MB. Free memory was 152.1MB in the beginning and 141.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 17:46:55,496 INFO L158 Benchmark]: TraceAbstraction took 56712.16ms. Allocated memory was 177.2MB in the beginning and 376.4MB in the end (delta: 199.2MB). Free memory was 140.6MB in the beginning and 203.9MB in the end (delta: -63.3MB). Peak memory consumption was 215.8MB. Max. memory is 8.0GB. [2022-03-20 17:46:55,497 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 177.2MB. Free memory was 145.4MB in the beginning and 145.3MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 209.01ms. Allocated memory is still 177.2MB. Free memory was 128.9MB in the beginning and 153.8MB in the end (delta: -24.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.40ms. Allocated memory is still 177.2MB. Free memory was 153.8MB in the beginning and 152.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 286.34ms. Allocated memory is still 177.2MB. Free memory was 152.1MB in the beginning and 141.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 56712.16ms. Allocated memory was 177.2MB in the beginning and 376.4MB in the end (delta: 199.2MB). Free memory was 140.6MB in the beginning and 203.9MB in the end (delta: -63.3MB). Peak memory consumption was 215.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-20 17:46:55,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...