/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-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:36:52,471 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:36:52,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:36:52,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:36:52,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:36:52,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:36:52,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:36:52,524 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:36:52,529 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:36:52,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:36:52,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:36:52,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:36:52,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:36:52,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:36:52,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:36:52,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:36:52,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:36:52,531 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:36:52,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:36:52,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:36:52,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:36:52,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:36:52,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:36:52,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:36:52,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:36:52,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:36:52,532 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:36:52,532 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:36:52,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:36:52,532 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:36:52,532 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:36:52,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:36:52,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:36:52,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:36:52,734 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:36:52,735 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:36:52,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-04-06 20:36:52,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b96f63f36/c69c0c56a53b4191ab7f473bc523e806/FLAG362dea323 [2022-04-06 20:36:53,101 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:36:53,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-04-06 20:36:53,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b96f63f36/c69c0c56a53b4191ab7f473bc523e806/FLAG362dea323 [2022-04-06 20:36:53,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b96f63f36/c69c0c56a53b4191ab7f473bc523e806 [2022-04-06 20:36:53,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:36:53,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:36:53,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:36:53,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:36:53,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:36:53,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:36:53" (1/1) ... [2022-04-06 20:36:53,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67ab84b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53, skipping insertion in model container [2022-04-06 20:36:53,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:36:53" (1/1) ... [2022-04-06 20:36:53,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:36:53,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:36:53,747 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-crafted-1/in-de52.c[368,381] [2022-04-06 20:36:53,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:36:53,772 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:36:53,782 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-crafted-1/in-de52.c[368,381] [2022-04-06 20:36:53,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:36:53,803 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:36:53,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53 WrapperNode [2022-04-06 20:36:53,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:36:53,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:36:53,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:36:53,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:36:53,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53" (1/1) ... [2022-04-06 20:36:53,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53" (1/1) ... [2022-04-06 20:36:53,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53" (1/1) ... [2022-04-06 20:36:53,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53" (1/1) ... [2022-04-06 20:36:53,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53" (1/1) ... [2022-04-06 20:36:53,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53" (1/1) ... [2022-04-06 20:36:53,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53" (1/1) ... [2022-04-06 20:36:53,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:36:53,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:36:53,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:36:53,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:36:53,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53" (1/1) ... [2022-04-06 20:36:53,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:36:53,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:53,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 20:36:53,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 20:36:53,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:36:53,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:36:53,913 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:36:53,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:36:53,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:36:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:36:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:36:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:36:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:36:53,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 20:36:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:36:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:36:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:36:53,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:36:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:36:53,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:36:53,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:36:53,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:36:53,966 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:36:53,967 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:36:54,120 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:36:54,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:36:54,125 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-04-06 20:36:54,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:36:54 BoogieIcfgContainer [2022-04-06 20:36:54,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:36:54,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:36:54,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:36:54,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:36:54,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:36:53" (1/3) ... [2022-04-06 20:36:54,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc935a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:36:54, skipping insertion in model container [2022-04-06 20:36:54,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:53" (2/3) ... [2022-04-06 20:36:54,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc935a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:36:54, skipping insertion in model container [2022-04-06 20:36:54,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:36:54" (3/3) ... [2022-04-06 20:36:54,132 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.c [2022-04-06 20:36:54,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:36:54,136 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:36:54,169 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:36:54,175 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 20:36:54,175 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:36:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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) [2022-04-06 20:36:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:36:54,191 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:54,192 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:54,192 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:54,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:54,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1060076674, now seen corresponding path program 1 times [2022-04-06 20:36:54,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [778902494] [2022-04-06 20:36:54,223 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:36:54,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1060076674, now seen corresponding path program 2 times [2022-04-06 20:36:54,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:54,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269837291] [2022-04-06 20:36:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:54,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:54,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:54,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:54,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269837291] [2022-04-06 20:36:54,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269837291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:54,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:54,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:36:54,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:54,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [778902494] [2022-04-06 20:36:54,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [778902494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:54,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:54,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:36:54,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465513120] [2022-04-06 20:36:54,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:54,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:36:54,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:36:54,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:36:54,425 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:54,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:54,476 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2022-04-06 20:36:54,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:36:54,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2022-04-06 20:36:54,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:54,484 INFO L225 Difference]: With dead ends: 41 [2022-04-06 20:36:54,484 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:36:54,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:36:54,491 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:54,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:36:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:36:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-04-06 20:36:54,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2022-04-06 20:36:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:54,525 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-04-06 20:36:54,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-04-06 20:36:54,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:36:54,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:54,526 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:54,526 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:36:54,526 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1174593278, now seen corresponding path program 1 times [2022-04-06 20:36:54,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1787003247] [2022-04-06 20:36:54,530 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:36:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1174593278, now seen corresponding path program 2 times [2022-04-06 20:36:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:54,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364114030] [2022-04-06 20:36:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:54,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:54,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:54,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364114030] [2022-04-06 20:36:54,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364114030] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:54,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:54,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:36:54,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:54,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1787003247] [2022-04-06 20:36:54,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1787003247] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:54,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:54,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:36:54,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477136582] [2022-04-06 20:36:54,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:54,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:36:54,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:36:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:36:54,662 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:54,795 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-04-06 20:36:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:36:54,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-04-06 20:36:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:54,796 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:36:54,796 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:36:54,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:36:54,797 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:54,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:36:54,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 20:36:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-04-06 20:36:54,803 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 16 [2022-04-06 20:36:54,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:54,803 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-04-06 20:36:54,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:54,804 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-04-06 20:36:54,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:36:54,804 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:54,804 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:54,804 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:36:54,805 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2018158143, now seen corresponding path program 1 times [2022-04-06 20:36:54,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [91199306] [2022-04-06 20:36:54,806 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:54,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2018158143, now seen corresponding path program 2 times [2022-04-06 20:36:54,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:54,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970993001] [2022-04-06 20:36:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:54,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:54,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:54,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:54,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970993001] [2022-04-06 20:36:54,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970993001] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:54,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:54,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:36:54,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:54,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [91199306] [2022-04-06 20:36:54,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [91199306] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:54,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:54,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:36:54,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245731188] [2022-04-06 20:36:54,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:54,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:36:54,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:36:54,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:36:54,873 INFO L87 Difference]: Start difference. First operand 23 states and 30 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) [2022-04-06 20:36:54,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:54,924 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-04-06 20:36:54,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:36:54,924 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 [2022-04-06 20:36:54,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:54,925 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:36:54,925 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 20:36:54,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:36:54,926 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:54,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 26 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:54,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 20:36:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 20:36:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-04-06 20:36:54,933 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2022-04-06 20:36:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:54,933 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-04-06 20:36:54,934 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) [2022-04-06 20:36:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-04-06 20:36:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:36:54,934 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:54,934 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:54,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:36:54,935 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:54,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:54,937 INFO L85 PathProgramCache]: Analyzing trace with hash -615329744, now seen corresponding path program 1 times [2022-04-06 20:36:54,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [303135934] [2022-04-06 20:36:54,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash -615329744, now seen corresponding path program 2 times [2022-04-06 20:36:54,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:54,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454146178] [2022-04-06 20:36:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:54,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:54,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:54,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454146178] [2022-04-06 20:36:54,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454146178] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:54,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:54,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:36:54,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [303135934] [2022-04-06 20:36:54,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [303135934] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:54,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:54,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:36:54,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007368189] [2022-04-06 20:36:54,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:54,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:36:54,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:54,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:36:54,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:36:54,976 INFO L87 Difference]: Start difference. First operand 27 states and 36 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) [2022-04-06 20:36:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:55,023 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2022-04-06 20:36:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:36:55,023 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 [2022-04-06 20:36:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:55,024 INFO L225 Difference]: With dead ends: 43 [2022-04-06 20:36:55,024 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:36:55,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:36:55,025 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:55,025 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:55,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:36:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 20:36:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-04-06 20:36:55,034 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 17 [2022-04-06 20:36:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:55,034 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-04-06 20:36:55,038 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) [2022-04-06 20:36:55,039 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-04-06 20:36:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:36:55,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:55,040 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:55,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:36:55,040 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:55,041 INFO L85 PathProgramCache]: Analyzing trace with hash 669375650, now seen corresponding path program 1 times [2022-04-06 20:36:55,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:55,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [643672685] [2022-04-06 20:36:55,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:55,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:55,053 INFO L85 PathProgramCache]: Analyzing trace with hash 669375650, now seen corresponding path program 2 times [2022-04-06 20:36:55,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:55,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178129706] [2022-04-06 20:36:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:55,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:55,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:55,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178129706] [2022-04-06 20:36:55,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178129706] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:55,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:55,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:36:55,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:55,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [643672685] [2022-04-06 20:36:55,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [643672685] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:55,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:55,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:36:55,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341030214] [2022-04-06 20:36:55,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:55,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:36:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:36:55,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:36:55,097 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:55,192 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-04-06 20:36:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:36:55,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (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 18 [2022-04-06 20:36:55,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:55,194 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:36:55,194 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:36:55,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:36:55,195 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:55,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 31 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:36:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 20:36:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-04-06 20:36:55,202 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-04-06 20:36:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:55,202 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-04-06 20:36:55,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-04-06 20:36:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:36:55,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:55,203 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:55,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 20:36:55,204 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash 735022287, now seen corresponding path program 1 times [2022-04-06 20:36:55,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:55,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1687537625] [2022-04-06 20:36:55,205 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:55,206 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:55,206 INFO L85 PathProgramCache]: Analyzing trace with hash 735022287, now seen corresponding path program 2 times [2022-04-06 20:36:55,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:55,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740994628] [2022-04-06 20:36:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:55,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:55,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:55,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:55,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740994628] [2022-04-06 20:36:55,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740994628] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:55,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863727044] [2022-04-06 20:36:55,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:55,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:55,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:55,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:55,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:36:55,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:55,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:55,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:36:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:55,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:55,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863727044] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:55,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:55,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2022-04-06 20:36:55,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:55,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1687537625] [2022-04-06 20:36:55,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1687537625] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:55,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:55,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:36:55,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858001813] [2022-04-06 20:36:55,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:55,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:36:55,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:36:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:36:55,577 INFO L87 Difference]: Start difference. First operand 28 states and 37 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) [2022-04-06 20:36:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:55,662 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2022-04-06 20:36:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:36:55,663 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 19 [2022-04-06 20:36:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:55,665 INFO L225 Difference]: With dead ends: 57 [2022-04-06 20:36:55,665 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 20:36:55,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:36:55,666 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:55,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 36 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 20:36:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-04-06 20:36:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-04-06 20:36:55,682 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 19 [2022-04-06 20:36:55,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:55,684 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-04-06 20:36:55,684 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) [2022-04-06 20:36:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-04-06 20:36:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:36:55,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:55,685 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:55,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:55,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 20:36:55,900 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 342490275, now seen corresponding path program 1 times [2022-04-06 20:36:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:55,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [96581303] [2022-04-06 20:36:55,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:55,902 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:55,902 INFO L85 PathProgramCache]: Analyzing trace with hash 342490275, now seen corresponding path program 2 times [2022-04-06 20:36:55,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:55,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592009182] [2022-04-06 20:36:55,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:55,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:55,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:55,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:55,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592009182] [2022-04-06 20:36:55,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592009182] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:55,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565468823] [2022-04-06 20:36:55,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:55,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:55,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:55,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:55,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:36:55,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:55,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:36:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:56,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:56,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565468823] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:56,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:56,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-04-06 20:36:56,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:56,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [96581303] [2022-04-06 20:36:56,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [96581303] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:56,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:56,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:36:56,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958899350] [2022-04-06 20:36:56,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:56,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:36:56,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:56,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:36:56,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:36:56,126 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:56,193 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-04-06 20:36:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:36:56,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 20 [2022-04-06 20:36:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:56,194 INFO L225 Difference]: With dead ends: 49 [2022-04-06 20:36:56,194 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 20:36:56,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:36:56,195 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:56,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 20:36:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-04-06 20:36:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2022-04-06 20:36:56,202 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 20 [2022-04-06 20:36:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:56,202 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2022-04-06 20:36:56,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2022-04-06 20:36:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:36:56,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:56,203 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:56,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:56,416 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,SelfDestructingSolverStorable6 [2022-04-06 20:36:56,416 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1745318674, now seen corresponding path program 1 times [2022-04-06 20:36:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:56,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [228925782] [2022-04-06 20:36:56,418 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:56,418 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:56,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1745318674, now seen corresponding path program 2 times [2022-04-06 20:36:56,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:56,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093224245] [2022-04-06 20:36:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:56,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:56,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:56,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:56,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093224245] [2022-04-06 20:36:56,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093224245] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:56,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984021845] [2022-04-06 20:36:56,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:56,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:56,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:56,502 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:56,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:36:56,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:56,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:56,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:36:56,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:56,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:56,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984021845] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:56,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:56,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2022-04-06 20:36:56,760 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:56,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [228925782] [2022-04-06 20:36:56,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [228925782] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:56,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:56,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:36:56,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367247795] [2022-04-06 20:36:56,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:56,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:36:56,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:56,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:36:56,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:36:56,761 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:56,902 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2022-04-06 20:36:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:36:56,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 20 [2022-04-06 20:36:56,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:56,903 INFO L225 Difference]: With dead ends: 59 [2022-04-06 20:36:56,904 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:36:56,904 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:36:56,905 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:56,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 38 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:36:56,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-04-06 20:36:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-04-06 20:36:56,911 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 20 [2022-04-06 20:36:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:56,912 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-04-06 20:36:56,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-04-06 20:36:56,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:36:56,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:56,912 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:56,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:57,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:57,127 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:57,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2026119006, now seen corresponding path program 3 times [2022-04-06 20:36:57,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:57,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [819712703] [2022-04-06 20:36:57,129 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:57,129 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:57,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2026119006, now seen corresponding path program 4 times [2022-04-06 20:36:57,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:57,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836440222] [2022-04-06 20:36:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:57,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:57,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:57,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836440222] [2022-04-06 20:36:57,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836440222] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130367314] [2022-04-06 20:36:57,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:57,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:57,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:57,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:57,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:36:57,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:57,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:57,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:36:57,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:57,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:36:57,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130367314] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:57,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:36:57,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 10 [2022-04-06 20:36:57,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:57,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [819712703] [2022-04-06 20:36:57,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [819712703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:57,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:57,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:36:57,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691417703] [2022-04-06 20:36:57,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:57,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:36:57,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:57,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:36:57,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:36:57,328 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:57,351 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2022-04-06 20:36:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:36:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 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 20 [2022-04-06 20:36:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:57,352 INFO L225 Difference]: With dead ends: 48 [2022-04-06 20:36:57,352 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:36:57,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:36:57,353 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:57,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:36:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 20:36:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-04-06 20:36:57,375 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 20 [2022-04-06 20:36:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:57,376 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-04-06 20:36:57,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-04-06 20:36:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:36:57,376 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:57,376 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:57,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:57,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:57,591 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:57,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:57,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1005753922, now seen corresponding path program 1 times [2022-04-06 20:36:57,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:57,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2047265238] [2022-04-06 20:36:57,593 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:57,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:57,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1005753922, now seen corresponding path program 2 times [2022-04-06 20:36:57,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:57,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082062937] [2022-04-06 20:36:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:57,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:57,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:57,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:57,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082062937] [2022-04-06 20:36:57,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082062937] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:57,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777242452] [2022-04-06 20:36:57,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:57,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:57,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:57,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:57,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:36:57,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:57,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:57,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:36:57,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:57,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:36:57,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777242452] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:57,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:36:57,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 6] total 11 [2022-04-06 20:36:57,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:57,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2047265238] [2022-04-06 20:36:57,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2047265238] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:57,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:57,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:36:57,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689901921] [2022-04-06 20:36:57,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:57,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:36:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:36:57,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:36:57,836 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:57,853 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2022-04-06 20:36:57,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:36:57,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 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 20 [2022-04-06 20:36:57,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:57,854 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:36:57,854 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:36:57,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:36:57,855 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:57,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:57,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:36:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 20:36:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-06 20:36:57,863 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 20 [2022-04-06 20:36:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:57,863 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-06 20:36:57,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-06 20:36:57,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:36:57,864 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:57,864 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:57,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:58,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 20:36:58,072 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:58,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1695200847, now seen corresponding path program 1 times [2022-04-06 20:36:58,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:58,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1360843261] [2022-04-06 20:36:58,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:58,073 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:58,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1695200847, now seen corresponding path program 2 times [2022-04-06 20:36:58,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:58,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280667488] [2022-04-06 20:36:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:58,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:58,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:58,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:58,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280667488] [2022-04-06 20:36:58,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280667488] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10682533] [2022-04-06 20:36:58,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:58,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:58,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:58,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:58,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:36:58,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:58,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:58,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:36:58,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:58,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:58,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10682533] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:58,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:58,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-04-06 20:36:58,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:58,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1360843261] [2022-04-06 20:36:58,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1360843261] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:58,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:58,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:36:58,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364505105] [2022-04-06 20:36:58,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:58,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:36:58,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:58,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:36:58,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:36:58,352 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 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) [2022-04-06 20:36:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:58,450 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-04-06 20:36:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:36:58,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 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 [2022-04-06 20:36:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:58,451 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:36:58,451 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 20:36:58,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:36:58,452 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:58,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 41 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 20:36:58,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 20:36:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:58,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-06 20:36:58,457 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 21 [2022-04-06 20:36:58,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:58,457 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-06 20:36:58,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 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) [2022-04-06 20:36:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-06 20:36:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:36:58,458 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:58,458 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:58,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:58,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:58,660 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2049284511, now seen corresponding path program 3 times [2022-04-06 20:36:58,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:58,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423360649] [2022-04-06 20:36:58,661 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:58,661 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2049284511, now seen corresponding path program 4 times [2022-04-06 20:36:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:58,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740860985] [2022-04-06 20:36:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:58,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:58,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:58,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:58,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740860985] [2022-04-06 20:36:58,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740860985] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:58,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172195104] [2022-04-06 20:36:58,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:58,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:58,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:58,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:58,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:36:58,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:58,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:58,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:36:58,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:36:58,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:36:58,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172195104] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:58,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:58,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 13 [2022-04-06 20:36:58,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423360649] [2022-04-06 20:36:58,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423360649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:58,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:58,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:36:58,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097633080] [2022-04-06 20:36:58,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:58,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:36:58,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:58,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:36:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:36:58,870 INFO L87 Difference]: Start difference. First operand 37 states and 46 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) [2022-04-06 20:36:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:59,027 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2022-04-06 20:36:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:36:59,027 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 21 [2022-04-06 20:36:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:59,028 INFO L225 Difference]: With dead ends: 71 [2022-04-06 20:36:59,028 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:36:59,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:36:59,029 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:59,029 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 49 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:36:59,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:36:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2022-04-06 20:36:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-04-06 20:36:59,035 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 21 [2022-04-06 20:36:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:59,035 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-04-06 20:36:59,035 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) [2022-04-06 20:36:59,035 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-04-06 20:36:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:36:59,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:59,036 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:59,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:59,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:59,247 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash -439116189, now seen corresponding path program 3 times [2022-04-06 20:36:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:59,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [196142474] [2022-04-06 20:36:59,249 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:59,249 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:59,249 INFO L85 PathProgramCache]: Analyzing trace with hash -439116189, now seen corresponding path program 4 times [2022-04-06 20:36:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:59,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480809920] [2022-04-06 20:36:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:59,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:59,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:59,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:59,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480809920] [2022-04-06 20:36:59,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480809920] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:59,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284123894] [2022-04-06 20:36:59,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:59,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:59,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:59,289 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:59,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:36:59,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:59,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:59,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:36:59,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:59,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:36:59,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284123894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:59,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:59,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-04-06 20:36:59,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [196142474] [2022-04-06 20:36:59,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [196142474] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:59,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:59,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:36:59,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263785971] [2022-04-06 20:36:59,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:59,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:36:59,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:36:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:36:59,387 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:59,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:59,435 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2022-04-06 20:36:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:36:59,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 22 [2022-04-06 20:36:59,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:59,435 INFO L225 Difference]: With dead ends: 53 [2022-04-06 20:36:59,436 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:36:59,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:36:59,436 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:59,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 31 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:36:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:36:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 20:36:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-06 20:36:59,440 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 22 [2022-04-06 20:36:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:59,441 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-06 20:36:59,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-06 20:36:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:36:59,441 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:59,441 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:59,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:59,655 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,SelfDestructingSolverStorable12 [2022-04-06 20:36:59,656 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:59,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1412676430, now seen corresponding path program 5 times [2022-04-06 20:36:59,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:59,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1807123588] [2022-04-06 20:36:59,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:59,657 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:59,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1412676430, now seen corresponding path program 6 times [2022-04-06 20:36:59,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:59,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131340951] [2022-04-06 20:36:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:59,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:59,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:59,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:59,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131340951] [2022-04-06 20:36:59,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131340951] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:59,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29068457] [2022-04-06 20:36:59,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:59,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:59,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:59,721 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:59,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:36:59,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:59,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:59,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:36:59,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:59,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:36:59,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29068457] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:59,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:59,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-04-06 20:36:59,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1807123588] [2022-04-06 20:36:59,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1807123588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:59,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:59,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:36:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096628095] [2022-04-06 20:36:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:59,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:36:59,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:59,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:36:59,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:36:59,971 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:00,162 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2022-04-06 20:37:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:37:00,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 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 22 [2022-04-06 20:37:00,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:00,163 INFO L225 Difference]: With dead ends: 72 [2022-04-06 20:37:00,163 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:37:00,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:37:00,164 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:00,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 59 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:37:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2022-04-06 20:37:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-04-06 20:37:00,169 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2022-04-06 20:37:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:00,169 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-04-06 20:37:00,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-04-06 20:37:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:37:00,170 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:00,170 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:00,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:00,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:37:00,383 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:00,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1409588607, now seen corresponding path program 3 times [2022-04-06 20:37:00,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:00,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931727055] [2022-04-06 20:37:00,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:00,385 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:00,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1409588607, now seen corresponding path program 4 times [2022-04-06 20:37:00,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:00,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734236103] [2022-04-06 20:37:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:00,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:00,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:00,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:00,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734236103] [2022-04-06 20:37:00,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734236103] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:00,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495889695] [2022-04-06 20:37:00,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:00,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:00,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:00,477 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:00,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:37:00,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:00,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:00,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:37:00,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:37:00,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:37:00,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495889695] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:00,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:00,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-04-06 20:37:00,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:00,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931727055] [2022-04-06 20:37:00,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931727055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:00,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:00,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:37:00,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902497963] [2022-04-06 20:37:00,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:00,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:37:00,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:00,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:37:00,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:37:00,620 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2022-04-06 20:37:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:00,860 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2022-04-06 20:37:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:37:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2022-04-06 20:37:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:00,860 INFO L225 Difference]: With dead ends: 73 [2022-04-06 20:37:00,860 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 20:37:00,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:37:00,861 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:00,861 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 20:37:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2022-04-06 20:37:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-04-06 20:37:00,869 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 23 [2022-04-06 20:37:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:00,869 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-04-06 20:37:00,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2022-04-06 20:37:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-04-06 20:37:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:37:00,869 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:00,869 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:00,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:01,083 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,SelfDestructingSolverStorable14 [2022-04-06 20:37:01,083 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1359283201, now seen corresponding path program 7 times [2022-04-06 20:37:01,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:01,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744991392] [2022-04-06 20:37:01,085 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:01,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:01,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1359283201, now seen corresponding path program 8 times [2022-04-06 20:37:01,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:01,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993269164] [2022-04-06 20:37:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:01,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:01,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:01,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:01,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993269164] [2022-04-06 20:37:01,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993269164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:01,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290238354] [2022-04-06 20:37:01,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:01,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:01,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:01,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:01,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:37:01,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:01,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:37:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:01,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:01,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290238354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:01,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:01,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:37:01,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:01,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744991392] [2022-04-06 20:37:01,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744991392] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:01,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:01,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:37:01,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962503349] [2022-04-06 20:37:01,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:01,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:37:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:37:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:37:01,366 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2022-04-06 20:37:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:01,596 INFO L93 Difference]: Finished difference Result 106 states and 143 transitions. [2022-04-06 20:37:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:37:01,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2022-04-06 20:37:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:01,597 INFO L225 Difference]: With dead ends: 106 [2022-04-06 20:37:01,597 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:37:01,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:37:01,598 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:01,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 65 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:37:01,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 55. [2022-04-06 20:37:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.28) internal successors, (64), 50 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-04-06 20:37:01,606 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 23 [2022-04-06 20:37:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:01,606 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-04-06 20:37:01,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2022-04-06 20:37:01,606 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-04-06 20:37:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:37:01,606 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:01,606 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:01,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:01,811 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,SelfDestructingSolverStorable15 [2022-04-06 20:37:01,811 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash -713078750, now seen corresponding path program 5 times [2022-04-06 20:37:01,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:01,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2079141805] [2022-04-06 20:37:01,813 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:01,813 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:01,813 INFO L85 PathProgramCache]: Analyzing trace with hash -713078750, now seen corresponding path program 6 times [2022-04-06 20:37:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:01,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234724662] [2022-04-06 20:37:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:01,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:37:01,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234724662] [2022-04-06 20:37:01,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234724662] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693456872] [2022-04-06 20:37:01,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:01,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:01,863 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:01,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:37:01,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 20:37:01,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:01,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:37:01,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:37:01,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:37:02,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693456872] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:02,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:02,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2022-04-06 20:37:02,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:02,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2079141805] [2022-04-06 20:37:02,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2079141805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:02,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:02,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:37:02,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298893016] [2022-04-06 20:37:02,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:02,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:37:02,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:37:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:37:02,014 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:02,121 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2022-04-06 20:37:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:37:02,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 24 [2022-04-06 20:37:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:02,121 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:37:02,122 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:37:02,122 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:37:02,122 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:02,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:37:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-04-06 20:37:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:02,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2022-04-06 20:37:02,132 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 24 [2022-04-06 20:37:02,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:02,132 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2022-04-06 20:37:02,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:02,132 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2022-04-06 20:37:02,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:37:02,133 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:02,133 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:02,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:02,351 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,SelfDestructingSolverStorable16 [2022-04-06 20:37:02,351 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:02,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:02,352 INFO L85 PathProgramCache]: Analyzing trace with hash 295906898, now seen corresponding path program 9 times [2022-04-06 20:37:02,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:02,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674965568] [2022-04-06 20:37:02,353 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:02,353 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash 295906898, now seen corresponding path program 10 times [2022-04-06 20:37:02,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:02,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212747051] [2022-04-06 20:37:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:02,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:02,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:02,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:02,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212747051] [2022-04-06 20:37:02,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212747051] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:02,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268598810] [2022-04-06 20:37:02,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:02,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:02,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:02,443 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:02,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:37:02,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:02,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:37:02,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:02,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:02,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268598810] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:02,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:02,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 20:37:02,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:02,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674965568] [2022-04-06 20:37:02,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674965568] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:02,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:02,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:37:02,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118811054] [2022-04-06 20:37:02,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:02,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:37:02,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:02,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:37:02,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:37:02,656 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:02,961 INFO L93 Difference]: Finished difference Result 141 states and 193 transitions. [2022-04-06 20:37:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:37:02,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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 24 [2022-04-06 20:37:02,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:02,962 INFO L225 Difference]: With dead ends: 141 [2022-04-06 20:37:02,963 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 20:37:02,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:37:02,963 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 62 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:02,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 81 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:02,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 20:37:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 77. [2022-04-06 20:37:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 72 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2022-04-06 20:37:02,974 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 24 [2022-04-06 20:37:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:02,974 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2022-04-06 20:37:02,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2022-04-06 20:37:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:37:02,975 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:02,975 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:02,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:03,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:37:03,175 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash 67192415, now seen corresponding path program 11 times [2022-04-06 20:37:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:03,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [699235581] [2022-04-06 20:37:03,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:03,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:03,177 INFO L85 PathProgramCache]: Analyzing trace with hash 67192415, now seen corresponding path program 12 times [2022-04-06 20:37:03,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:03,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562487134] [2022-04-06 20:37:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:03,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:03,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:03,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562487134] [2022-04-06 20:37:03,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562487134] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:03,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090202808] [2022-04-06 20:37:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:03,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:03,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:03,282 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:03,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:37:03,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:03,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:03,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:03,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:37:03,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:37:03,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090202808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:03,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:03,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 21 [2022-04-06 20:37:03,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:03,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [699235581] [2022-04-06 20:37:03,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [699235581] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:03,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:03,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:37:03,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021948176] [2022-04-06 20:37:03,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:03,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:37:03,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:37:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:37:03,546 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2022-04-06 20:37:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:03,954 INFO L93 Difference]: Finished difference Result 158 states and 218 transitions. [2022-04-06 20:37:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:37:03,954 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 [2022-04-06 20:37:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:03,955 INFO L225 Difference]: With dead ends: 158 [2022-04-06 20:37:03,955 INFO L226 Difference]: Without dead ends: 141 [2022-04-06 20:37:03,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:37:03,956 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 76 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:03,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 85 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-04-06 20:37:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2022-04-06 20:37:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.3) internal successors, (104), 80 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2022-04-06 20:37:03,968 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 25 [2022-04-06 20:37:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:03,968 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2022-04-06 20:37:03,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2022-04-06 20:37:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2022-04-06 20:37:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:37:03,968 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:03,968 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:03,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:04,169 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:04,169 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:04,169 INFO L85 PathProgramCache]: Analyzing trace with hash -137630238, now seen corresponding path program 5 times [2022-04-06 20:37:04,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:04,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [996484976] [2022-04-06 20:37:04,170 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:04,170 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash -137630238, now seen corresponding path program 6 times [2022-04-06 20:37:04,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:04,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111766509] [2022-04-06 20:37:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:04,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:04,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:37:04,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111766509] [2022-04-06 20:37:04,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111766509] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:04,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331682602] [2022-04-06 20:37:04,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:04,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:04,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:04,254 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:04,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:37:04,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 20:37:04,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:04,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:37:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:37:04,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:37:04,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331682602] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:04,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:04,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2022-04-06 20:37:04,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:04,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [996484976] [2022-04-06 20:37:04,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [996484976] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:04,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:04,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:37:04,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561162006] [2022-04-06 20:37:04,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:04,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:37:04,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:04,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:37:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:37:04,438 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) 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) [2022-04-06 20:37:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:04,558 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2022-04-06 20:37:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:37:04,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) 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 26 [2022-04-06 20:37:04,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:04,558 INFO L225 Difference]: With dead ends: 94 [2022-04-06 20:37:04,558 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:37:04,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:37:04,560 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:04,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 46 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:37:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-06 20:37:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.2962962962962963) internal successors, (105), 81 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2022-04-06 20:37:04,578 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 26 [2022-04-06 20:37:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:04,578 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2022-04-06 20:37:04,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) 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) [2022-04-06 20:37:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2022-04-06 20:37:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:37:04,579 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:04,579 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:04,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:04,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:04,796 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash -323050508, now seen corresponding path program 13 times [2022-04-06 20:37:04,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:04,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [62071158] [2022-04-06 20:37:04,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:04,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:04,797 INFO L85 PathProgramCache]: Analyzing trace with hash -323050508, now seen corresponding path program 14 times [2022-04-06 20:37:04,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:04,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424537502] [2022-04-06 20:37:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:04,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:04,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:37:04,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:04,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424537502] [2022-04-06 20:37:04,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424537502] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:04,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829317565] [2022-04-06 20:37:04,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:04,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:04,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:04,871 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:04,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:37:04,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:04,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:04,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:37:04,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:37:05,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:37:05,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829317565] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:05,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:05,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 19 [2022-04-06 20:37:05,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:05,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [62071158] [2022-04-06 20:37:05,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [62071158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:05,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:05,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:37:05,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035384724] [2022-04-06 20:37:05,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:05,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:37:05,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:05,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:37:05,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:37:05,133 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2022-04-06 20:37:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:05,377 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2022-04-06 20:37:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:37:05,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 26 [2022-04-06 20:37:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:05,378 INFO L225 Difference]: With dead ends: 120 [2022-04-06 20:37:05,378 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 20:37:05,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:05,379 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:05,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 54 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:05,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 20:37:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2022-04-06 20:37:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 81 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2022-04-06 20:37:05,390 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 26 [2022-04-06 20:37:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:05,391 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2022-04-06 20:37:05,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2022-04-06 20:37:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2022-04-06 20:37:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:37:05,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:05,391 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:05,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:05,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:05,607 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash -197432477, now seen corresponding path program 7 times [2022-04-06 20:37:05,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:05,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386315310] [2022-04-06 20:37:05,609 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:05,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:05,609 INFO L85 PathProgramCache]: Analyzing trace with hash -197432477, now seen corresponding path program 8 times [2022-04-06 20:37:05,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:05,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081248699] [2022-04-06 20:37:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:05,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:05,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:05,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:05,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081248699] [2022-04-06 20:37:05,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081248699] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:05,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762052621] [2022-04-06 20:37:05,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:05,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:05,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:05,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:05,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:37:05,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:05,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:05,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:05,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:37:05,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:37:05,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762052621] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:05,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:05,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-04-06 20:37:05,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:05,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386315310] [2022-04-06 20:37:05,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386315310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:05,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:05,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:37:05,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250191457] [2022-04-06 20:37:05,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:05,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:37:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:37:05,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:37:05,885 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:06,325 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2022-04-06 20:37:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:37:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 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 26 [2022-04-06 20:37:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:06,327 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:37:06,327 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 20:37:06,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:37:06,328 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:06,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 62 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 20:37:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 92. [2022-04-06 20:37:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.264367816091954) internal successors, (110), 87 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2022-04-06 20:37:06,341 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 26 [2022-04-06 20:37:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:06,341 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2022-04-06 20:37:06,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2022-04-06 20:37:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:37:06,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:06,342 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:06,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:06,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:06,543 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1566978034, now seen corresponding path program 15 times [2022-04-06 20:37:06,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:06,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1600083506] [2022-04-06 20:37:06,544 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:06,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:06,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1566978034, now seen corresponding path program 16 times [2022-04-06 20:37:06,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:06,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399590467] [2022-04-06 20:37:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:06,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:06,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:06,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:06,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399590467] [2022-04-06 20:37:06,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399590467] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:06,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586739076] [2022-04-06 20:37:06,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:06,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:06,677 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:06,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:37:06,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:37:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:06,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:06,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586739076] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:06,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:06,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:37:06,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:06,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1600083506] [2022-04-06 20:37:06,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1600083506] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:06,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:06,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:37:06,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897731315] [2022-04-06 20:37:06,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:06,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:37:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:37:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:37:06,946 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:07,400 INFO L93 Difference]: Finished difference Result 200 states and 274 transitions. [2022-04-06 20:37:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:37:07,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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 26 [2022-04-06 20:37:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:07,402 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:37:07,402 INFO L226 Difference]: Without dead ends: 183 [2022-04-06 20:37:07,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:37:07,402 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 86 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:07,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 96 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:07,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-06 20:37:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 100. [2022-04-06 20:37:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 95 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2022-04-06 20:37:07,417 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 26 [2022-04-06 20:37:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:07,417 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2022-04-06 20:37:07,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2022-04-06 20:37:07,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:37:07,418 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:07,418 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:07,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:07,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:07,631 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:07,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:07,632 INFO L85 PathProgramCache]: Analyzing trace with hash -438714480, now seen corresponding path program 7 times [2022-04-06 20:37:07,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:07,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051856968] [2022-04-06 20:37:07,633 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:07,633 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:07,633 INFO L85 PathProgramCache]: Analyzing trace with hash -438714480, now seen corresponding path program 8 times [2022-04-06 20:37:07,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:07,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023586125] [2022-04-06 20:37:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:07,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:07,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:37:07,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:07,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023586125] [2022-04-06 20:37:07,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023586125] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:07,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683486794] [2022-04-06 20:37:07,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:07,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:07,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:07,689 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:07,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:37:07,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:07,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:07,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:07,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:37:07,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:37:07,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683486794] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:07,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:07,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-04-06 20:37:07,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:07,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051856968] [2022-04-06 20:37:07,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051856968] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:07,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:07,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:37:07,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946276062] [2022-04-06 20:37:07,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:07,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:37:07,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:07,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:37:07,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:37:07,823 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:07,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:07,902 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2022-04-06 20:37:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:37:07,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 [2022-04-06 20:37:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:07,903 INFO L225 Difference]: With dead ends: 111 [2022-04-06 20:37:07,903 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 20:37:07,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:37:07,904 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:07,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:37:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 20:37:07,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-04-06 20:37:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2891566265060241) internal successors, (107), 83 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions. [2022-04-06 20:37:07,920 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 27 [2022-04-06 20:37:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:07,920 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 111 transitions. [2022-04-06 20:37:07,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions. [2022-04-06 20:37:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:37:07,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:07,921 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:07,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:08,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:08,135 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:08,136 INFO L85 PathProgramCache]: Analyzing trace with hash 815691967, now seen corresponding path program 17 times [2022-04-06 20:37:08,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:08,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1117680578] [2022-04-06 20:37:08,136 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:08,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:08,137 INFO L85 PathProgramCache]: Analyzing trace with hash 815691967, now seen corresponding path program 18 times [2022-04-06 20:37:08,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:08,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124295886] [2022-04-06 20:37:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:08,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:08,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:08,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124295886] [2022-04-06 20:37:08,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124295886] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:08,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572889696] [2022-04-06 20:37:08,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:08,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:08,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:08,267 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:08,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:37:08,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:08,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:08,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:08,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:37:08,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:37:08,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572889696] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:08,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:08,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 23 [2022-04-06 20:37:08,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:08,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1117680578] [2022-04-06 20:37:08,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1117680578] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:08,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:08,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:08,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155451078] [2022-04-06 20:37:08,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:08,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:08,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:08,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:08,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:37:08,527 INFO L87 Difference]: Start difference. First operand 88 states and 111 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:09,216 INFO L93 Difference]: Finished difference Result 198 states and 273 transitions. [2022-04-06 20:37:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:37:09,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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 [2022-04-06 20:37:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:09,217 INFO L225 Difference]: With dead ends: 198 [2022-04-06 20:37:09,217 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 20:37:09,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:37:09,218 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 85 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:09,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 111 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 20:37:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 96. [2022-04-06 20:37:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2022-04-06 20:37:09,233 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 27 [2022-04-06 20:37:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:09,233 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2022-04-06 20:37:09,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2022-04-06 20:37:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:37:09,234 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:09,234 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:09,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:09,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 20:37:09,444 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:09,444 INFO L85 PathProgramCache]: Analyzing trace with hash 349794051, now seen corresponding path program 9 times [2022-04-06 20:37:09,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:09,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [125894589] [2022-04-06 20:37:09,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:09,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash 349794051, now seen corresponding path program 10 times [2022-04-06 20:37:09,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:09,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298257866] [2022-04-06 20:37:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:09,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:09,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:09,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:37:09,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:09,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298257866] [2022-04-06 20:37:09,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298257866] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:09,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067334732] [2022-04-06 20:37:09,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:09,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:09,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:09,531 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:09,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:37:09,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:09,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:09,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:37:09,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:37:09,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067334732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:09,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:09,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2022-04-06 20:37:09,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:09,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [125894589] [2022-04-06 20:37:09,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [125894589] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:09,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:09,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:37:09,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567208516] [2022-04-06 20:37:09,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:09,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:37:09,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:09,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:37:09,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:37:09,687 INFO L87 Difference]: Start difference. First operand 96 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:09,856 INFO L93 Difference]: Finished difference Result 132 states and 173 transitions. [2022-04-06 20:37:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:37:09,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 28 [2022-04-06 20:37:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:09,857 INFO L225 Difference]: With dead ends: 132 [2022-04-06 20:37:09,857 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 20:37:09,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:37:09,858 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:09,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 35 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 20:37:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-04-06 20:37:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.2982456140350878) internal successors, (148), 114 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 152 transitions. [2022-04-06 20:37:09,879 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 152 transitions. Word has length 28 [2022-04-06 20:37:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:09,879 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 152 transitions. [2022-04-06 20:37:09,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 152 transitions. [2022-04-06 20:37:09,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:37:09,880 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:09,880 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:09,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 20:37:10,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:37:10,083 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash -173294718, now seen corresponding path program 19 times [2022-04-06 20:37:10,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:10,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107031135] [2022-04-06 20:37:10,094 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:10,094 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:10,094 INFO L85 PathProgramCache]: Analyzing trace with hash -173294718, now seen corresponding path program 20 times [2022-04-06 20:37:10,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:10,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042217341] [2022-04-06 20:37:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:10,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:10,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 20:37:10,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:10,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042217341] [2022-04-06 20:37:10,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042217341] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:10,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545426904] [2022-04-06 20:37:10,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:10,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:10,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:10,206 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:10,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:37:10,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:10,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:10,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:37:10,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 20:37:10,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:37:10,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545426904] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:10,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:10,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 24 [2022-04-06 20:37:10,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:10,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107031135] [2022-04-06 20:37:10,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107031135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:10,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:10,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:37:10,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851463265] [2022-04-06 20:37:10,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:10,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:37:10,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:37:10,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:37:10,523 INFO L87 Difference]: Start difference. First operand 119 states and 152 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:10,832 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2022-04-06 20:37:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:37:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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 28 [2022-04-06 20:37:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:10,833 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:37:10,833 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 20:37:10,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:37:10,834 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:10,834 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 72 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:10,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 20:37:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 119. [2022-04-06 20:37:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 114 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 151 transitions. [2022-04-06 20:37:10,865 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 151 transitions. Word has length 28 [2022-04-06 20:37:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:10,865 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 151 transitions. [2022-04-06 20:37:10,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 151 transitions. [2022-04-06 20:37:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:37:10,866 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:10,866 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:10,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:11,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:37:11,067 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:11,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:11,067 INFO L85 PathProgramCache]: Analyzing trace with hash -999339630, now seen corresponding path program 21 times [2022-04-06 20:37:11,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:11,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1652040603] [2022-04-06 20:37:11,068 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:11,068 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:11,068 INFO L85 PathProgramCache]: Analyzing trace with hash -999339630, now seen corresponding path program 22 times [2022-04-06 20:37:11,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:11,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619346094] [2022-04-06 20:37:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:11,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:11,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:11,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619346094] [2022-04-06 20:37:11,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619346094] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:11,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353931021] [2022-04-06 20:37:11,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:11,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:11,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:11,190 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:11,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:37:11,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:11,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:11,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:37:11,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:11,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:11,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353931021] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:11,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:11,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:37:11,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:11,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1652040603] [2022-04-06 20:37:11,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1652040603] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:11,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:11,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:37:11,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430531079] [2022-04-06 20:37:11,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:11,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:37:11,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:37:11,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:11,498 INFO L87 Difference]: Start difference. First operand 119 states and 151 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:12,131 INFO L93 Difference]: Finished difference Result 248 states and 345 transitions. [2022-04-06 20:37:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:37:12,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 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 28 [2022-04-06 20:37:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:12,132 INFO L225 Difference]: With dead ends: 248 [2022-04-06 20:37:12,132 INFO L226 Difference]: Without dead ends: 228 [2022-04-06 20:37:12,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=1287, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:37:12,133 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 95 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:12,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 117 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-04-06 20:37:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 129. [2022-04-06 20:37:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.2983870967741935) internal successors, (161), 124 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 165 transitions. [2022-04-06 20:37:12,156 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 165 transitions. Word has length 28 [2022-04-06 20:37:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:12,156 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 165 transitions. [2022-04-06 20:37:12,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 165 transitions. [2022-04-06 20:37:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:37:12,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:12,157 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:12,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 20:37:12,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:12,358 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:12,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:12,358 INFO L85 PathProgramCache]: Analyzing trace with hash -409683135, now seen corresponding path program 11 times [2022-04-06 20:37:12,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:12,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2067983729] [2022-04-06 20:37:12,359 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:12,359 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash -409683135, now seen corresponding path program 12 times [2022-04-06 20:37:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:12,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100288752] [2022-04-06 20:37:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:12,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:12,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:12,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:12,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100288752] [2022-04-06 20:37:12,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100288752] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:12,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774239979] [2022-04-06 20:37:12,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:12,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:12,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:12,498 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:12,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:37:12,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:12,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:37:12,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:37:12,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:37:12,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774239979] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:12,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:12,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-04-06 20:37:12,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:12,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2067983729] [2022-04-06 20:37:12,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2067983729] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:12,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:12,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:12,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671393887] [2022-04-06 20:37:12,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:12,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:12,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:12,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:37:12,674 INFO L87 Difference]: Start difference. First operand 129 states and 165 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:13,374 INFO L93 Difference]: Finished difference Result 196 states and 262 transitions. [2022-04-06 20:37:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:37:13,374 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 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 [2022-04-06 20:37:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:13,375 INFO L225 Difference]: With dead ends: 196 [2022-04-06 20:37:13,375 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 20:37:13,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=2499, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:37:13,376 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:13,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:13,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 20:37:13,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 136. [2022-04-06 20:37:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.2748091603053435) internal successors, (167), 131 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2022-04-06 20:37:13,400 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 29 [2022-04-06 20:37:13,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:13,400 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2022-04-06 20:37:13,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:13,400 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2022-04-06 20:37:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:37:13,400 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:13,400 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:13,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:13,606 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:37:13,607 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:13,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:13,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1430744289, now seen corresponding path program 23 times [2022-04-06 20:37:13,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:13,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1810782180] [2022-04-06 20:37:13,608 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:13,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1430744289, now seen corresponding path program 24 times [2022-04-06 20:37:13,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:13,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997940716] [2022-04-06 20:37:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:13,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:13,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:13,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:13,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997940716] [2022-04-06 20:37:13,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997940716] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:13,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845230768] [2022-04-06 20:37:13,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:13,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:13,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:13,783 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:13,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:37:13,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:13,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:13,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:37:13,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:37:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845230768] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:14,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:14,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 25 [2022-04-06 20:37:14,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:14,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1810782180] [2022-04-06 20:37:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1810782180] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:14,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:14,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:14,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102724141] [2022-04-06 20:37:14,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:14,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:14,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:14,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:14,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:37:14,093 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:14,884 INFO L93 Difference]: Finished difference Result 304 states and 421 transitions. [2022-04-06 20:37:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:37:14,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 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 [2022-04-06 20:37:14,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:14,885 INFO L225 Difference]: With dead ends: 304 [2022-04-06 20:37:14,885 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 20:37:14,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=1346, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:37:14,887 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 108 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:14,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 131 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:37:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 20:37:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 146. [2022-04-06 20:37:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2836879432624113) internal successors, (181), 141 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 185 transitions. [2022-04-06 20:37:14,918 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 185 transitions. Word has length 29 [2022-04-06 20:37:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:14,918 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 185 transitions. [2022-04-06 20:37:14,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 185 transitions. [2022-04-06 20:37:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:37:14,919 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:14,919 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:14,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:15,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:15,121 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1500556532, now seen corresponding path program 25 times [2022-04-06 20:37:15,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:15,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2112621847] [2022-04-06 20:37:15,122 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:15,123 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1500556532, now seen corresponding path program 26 times [2022-04-06 20:37:15,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:15,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244010633] [2022-04-06 20:37:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:15,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:15,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:37:15,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:15,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244010633] [2022-04-06 20:37:15,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244010633] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:15,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331359713] [2022-04-06 20:37:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:15,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:15,217 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:15,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:37:15,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:15,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:15,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:37:15,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:37:15,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:37:15,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331359713] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:15,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:15,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 21 [2022-04-06 20:37:15,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:15,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2112621847] [2022-04-06 20:37:15,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2112621847] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:15,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:15,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:37:15,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128697497] [2022-04-06 20:37:15,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:15,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:37:15,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:15,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:37:15,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:37:15,458 INFO L87 Difference]: Start difference. First operand 146 states and 185 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2022-04-06 20:37:15,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:15,865 INFO L93 Difference]: Finished difference Result 228 states and 288 transitions. [2022-04-06 20:37:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:37:15,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 30 [2022-04-06 20:37:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:15,866 INFO L225 Difference]: With dead ends: 228 [2022-04-06 20:37:15,866 INFO L226 Difference]: Without dead ends: 213 [2022-04-06 20:37:15,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:37:15,867 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 57 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:15,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 82 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-06 20:37:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 146. [2022-04-06 20:37:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2765957446808511) internal successors, (180), 141 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-04-06 20:37:15,894 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 30 [2022-04-06 20:37:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:15,894 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-04-06 20:37:15,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2022-04-06 20:37:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-04-06 20:37:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:37:15,894 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:15,894 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:15,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:16,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 20:37:16,111 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1919386830, now seen corresponding path program 27 times [2022-04-06 20:37:16,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:16,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2103963446] [2022-04-06 20:37:16,112 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:16,112 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:16,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1919386830, now seen corresponding path program 28 times [2022-04-06 20:37:16,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:16,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025182288] [2022-04-06 20:37:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:16,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:16,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:16,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:16,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025182288] [2022-04-06 20:37:16,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025182288] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798649624] [2022-04-06 20:37:16,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:16,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:16,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:16,281 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:16,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:37:16,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:16,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:16,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:37:16,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:16,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:16,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798649624] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:16,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:16,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:37:16,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:16,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2103963446] [2022-04-06 20:37:16,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2103963446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:16,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:16,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:37:16,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184117577] [2022-04-06 20:37:16,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:16,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:37:16,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:16,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:37:16,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:37:16,685 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:17,531 INFO L93 Difference]: Finished difference Result 327 states and 454 transitions. [2022-04-06 20:37:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:37:17,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 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 30 [2022-04-06 20:37:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:17,533 INFO L225 Difference]: With dead ends: 327 [2022-04-06 20:37:17,533 INFO L226 Difference]: Without dead ends: 307 [2022-04-06 20:37:17,533 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=1699, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:37:17,534 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 119 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:17,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 142 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:37:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-04-06 20:37:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 156. [2022-04-06 20:37:17,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.2847682119205297) internal successors, (194), 151 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 198 transitions. [2022-04-06 20:37:17,563 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 198 transitions. Word has length 30 [2022-04-06 20:37:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:17,563 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 198 transitions. [2022-04-06 20:37:17,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 198 transitions. [2022-04-06 20:37:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:37:17,564 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:17,564 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:17,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:17,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:17,764 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:17,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:17,765 INFO L85 PathProgramCache]: Analyzing trace with hash -543637167, now seen corresponding path program 9 times [2022-04-06 20:37:17,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:17,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1687989546] [2022-04-06 20:37:17,766 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:17,766 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:17,766 INFO L85 PathProgramCache]: Analyzing trace with hash -543637167, now seen corresponding path program 10 times [2022-04-06 20:37:17,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:17,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998070581] [2022-04-06 20:37:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:17,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:17,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:37:17,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:17,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998070581] [2022-04-06 20:37:17,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998070581] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:17,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180965666] [2022-04-06 20:37:17,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:17,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:17,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:17,859 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:17,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:37:17,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:17,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:17,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:37:17,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:18,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:37:18,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180965666] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:18,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:18,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 24 [2022-04-06 20:37:18,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:18,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1687989546] [2022-04-06 20:37:18,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1687989546] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:18,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:18,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:37:18,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766872] [2022-04-06 20:37:18,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:18,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:37:18,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:37:18,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:37:18,236 INFO L87 Difference]: Start difference. First operand 156 states and 198 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:18,418 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2022-04-06 20:37:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:37:18,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 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 [2022-04-06 20:37:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:18,419 INFO L225 Difference]: With dead ends: 166 [2022-04-06 20:37:18,419 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 20:37:18,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:37:18,420 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:18,420 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 51 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 20:37:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-04-06 20:37:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.2828947368421053) internal successors, (195), 152 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:18,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 199 transitions. [2022-04-06 20:37:18,449 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 199 transitions. Word has length 31 [2022-04-06 20:37:18,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:18,449 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 199 transitions. [2022-04-06 20:37:18,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 199 transitions. [2022-04-06 20:37:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:37:18,450 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:18,450 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:18,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 20:37:18,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:18,650 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2007429169, now seen corresponding path program 13 times [2022-04-06 20:37:18,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:18,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [490585978] [2022-04-06 20:37:18,652 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:18,652 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:18,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2007429169, now seen corresponding path program 14 times [2022-04-06 20:37:18,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:18,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899203756] [2022-04-06 20:37:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:18,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:18,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:37:18,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899203756] [2022-04-06 20:37:18,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899203756] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298834838] [2022-04-06 20:37:18,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:18,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:18,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:18,769 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:18,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:37:18,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:18,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:37:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 20:37:18,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 20:37:18,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298834838] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:18,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:18,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-04-06 20:37:18,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:18,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [490585978] [2022-04-06 20:37:18,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [490585978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:18,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:18,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:18,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774295908] [2022-04-06 20:37:18,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:18,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:18,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:18,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:18,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:37:18,923 INFO L87 Difference]: Start difference. First operand 157 states and 199 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:19,407 INFO L93 Difference]: Finished difference Result 239 states and 304 transitions. [2022-04-06 20:37:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:37:19,408 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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 [2022-04-06 20:37:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:19,408 INFO L225 Difference]: With dead ends: 239 [2022-04-06 20:37:19,408 INFO L226 Difference]: Without dead ends: 215 [2022-04-06 20:37:19,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:37:19,409 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:19,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 82 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-06 20:37:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2022-04-06 20:37:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2745098039215685) internal successors, (195), 153 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 199 transitions. [2022-04-06 20:37:19,449 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 199 transitions. Word has length 31 [2022-04-06 20:37:19,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:19,449 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 199 transitions. [2022-04-06 20:37:19,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 199 transitions. [2022-04-06 20:37:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:37:19,450 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:19,450 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:19,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:19,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:19,666 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:19,666 INFO L85 PathProgramCache]: Analyzing trace with hash 112563583, now seen corresponding path program 29 times [2022-04-06 20:37:19,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:19,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322189953] [2022-04-06 20:37:19,667 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:19,667 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash 112563583, now seen corresponding path program 30 times [2022-04-06 20:37:19,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:19,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708843828] [2022-04-06 20:37:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:19,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:19,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:19,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:19,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708843828] [2022-04-06 20:37:19,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708843828] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:19,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243257860] [2022-04-06 20:37:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:19,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:19,843 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:19,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:37:19,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:19,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:19,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:19,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:37:20,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:37:20,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243257860] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:20,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:20,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 27 [2022-04-06 20:37:20,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:20,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322189953] [2022-04-06 20:37:20,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322189953] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:20,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:20,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:37:20,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033097312] [2022-04-06 20:37:20,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:20,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:37:20,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:20,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:37:20,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:37:20,161 INFO L87 Difference]: Start difference. First operand 158 states and 199 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:21,249 INFO L93 Difference]: Finished difference Result 351 states and 487 transitions. [2022-04-06 20:37:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:37:21,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 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 [2022-04-06 20:37:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:21,250 INFO L225 Difference]: With dead ends: 351 [2022-04-06 20:37:21,250 INFO L226 Difference]: Without dead ends: 331 [2022-04-06 20:37:21,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=1658, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:37:21,251 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 130 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:21,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 148 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:37:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-04-06 20:37:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 168. [2022-04-06 20:37:21,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.2822085889570551) internal successors, (209), 163 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 213 transitions. [2022-04-06 20:37:21,283 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 213 transitions. Word has length 31 [2022-04-06 20:37:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:21,283 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 213 transitions. [2022-04-06 20:37:21,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 213 transitions. [2022-04-06 20:37:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:37:21,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:21,284 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:21,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:21,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 20:37:21,490 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:21,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:21,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1990656643, now seen corresponding path program 11 times [2022-04-06 20:37:21,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:21,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1953533969] [2022-04-06 20:37:21,491 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:21,491 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1990656643, now seen corresponding path program 12 times [2022-04-06 20:37:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:21,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135815735] [2022-04-06 20:37:21,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:21,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:21,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:37:21,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:21,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135815735] [2022-04-06 20:37:21,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135815735] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:21,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553036502] [2022-04-06 20:37:21,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:21,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:21,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:21,551 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:21,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:37:21,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:21,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:21,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:21,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:37:21,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 20:37:21,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553036502] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:21,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:21,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-04-06 20:37:21,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:21,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1953533969] [2022-04-06 20:37:21,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1953533969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:21,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:21,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:37:21,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258520171] [2022-04-06 20:37:21,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:21,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:37:21,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:21,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:37:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:37:21,726 INFO L87 Difference]: Start difference. First operand 168 states and 213 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:21,848 INFO L93 Difference]: Finished difference Result 180 states and 227 transitions. [2022-04-06 20:37:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:37:21,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 32 [2022-04-06 20:37:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:21,849 INFO L225 Difference]: With dead ends: 180 [2022-04-06 20:37:21,849 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 20:37:21,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:37:21,850 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:21,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 47 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 20:37:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2022-04-06 20:37:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.2993197278911566) internal successors, (191), 147 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 195 transitions. [2022-04-06 20:37:21,899 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 195 transitions. Word has length 32 [2022-04-06 20:37:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:21,899 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 195 transitions. [2022-04-06 20:37:21,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 195 transitions. [2022-04-06 20:37:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:37:21,900 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:21,900 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:21,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:22,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 20:37:22,115 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:22,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1320683330, now seen corresponding path program 15 times [2022-04-06 20:37:22,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:22,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [733602686] [2022-04-06 20:37:22,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:22,116 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1320683330, now seen corresponding path program 16 times [2022-04-06 20:37:22,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:22,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191157906] [2022-04-06 20:37:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:22,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:22,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:37:22,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:22,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191157906] [2022-04-06 20:37:22,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191157906] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:22,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404074110] [2022-04-06 20:37:22,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:22,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:22,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:22,205 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:22,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:37:22,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:22,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:22,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:37:22,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:37:22,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:37:22,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404074110] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:22,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:22,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-04-06 20:37:22,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [733602686] [2022-04-06 20:37:22,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [733602686] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:22,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:22,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:37:22,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645124571] [2022-04-06 20:37:22,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:22,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:37:22,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:22,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:37:22,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:37:22,388 INFO L87 Difference]: Start difference. First operand 152 states and 195 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:22,650 INFO L93 Difference]: Finished difference Result 198 states and 261 transitions. [2022-04-06 20:37:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:37:22,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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 32 [2022-04-06 20:37:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:22,651 INFO L225 Difference]: With dead ends: 198 [2022-04-06 20:37:22,651 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 20:37:22,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:37:22,651 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:22,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 64 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:22,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 20:37:22,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2022-04-06 20:37:22,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.297752808988764) internal successors, (231), 178 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:22,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 235 transitions. [2022-04-06 20:37:22,694 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 235 transitions. Word has length 32 [2022-04-06 20:37:22,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:22,694 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 235 transitions. [2022-04-06 20:37:22,694 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:22,694 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 235 transitions. [2022-04-06 20:37:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:37:22,695 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:22,695 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:22,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:22,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:22,908 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:22,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1032467933, now seen corresponding path program 17 times [2022-04-06 20:37:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:22,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1261049816] [2022-04-06 20:37:22,909 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:22,909 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:22,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1032467933, now seen corresponding path program 18 times [2022-04-06 20:37:22,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:22,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520905496] [2022-04-06 20:37:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:22,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:23,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:23,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520905496] [2022-04-06 20:37:23,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520905496] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071091440] [2022-04-06 20:37:23,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:23,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:23,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:23,068 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:23,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:37:23,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:37:23,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:37:23,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:37:23,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:37:23,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071091440] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:23,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:23,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 22 [2022-04-06 20:37:23,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:23,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1261049816] [2022-04-06 20:37:23,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1261049816] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:23,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:23,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:23,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347813001] [2022-04-06 20:37:23,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:23,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:23,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:23,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:37:23,313 INFO L87 Difference]: Start difference. First operand 183 states and 235 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2022-04-06 20:37:24,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:24,427 INFO L93 Difference]: Finished difference Result 254 states and 344 transitions. [2022-04-06 20:37:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:37:24,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 32 [2022-04-06 20:37:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:24,428 INFO L225 Difference]: With dead ends: 254 [2022-04-06 20:37:24,428 INFO L226 Difference]: Without dead ends: 238 [2022-04-06 20:37:24,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=4213, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:37:24,430 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:24,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 90 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:24,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-04-06 20:37:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 191. [2022-04-06 20:37:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2849462365591398) internal successors, (239), 186 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 243 transitions. [2022-04-06 20:37:24,503 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 243 transitions. Word has length 32 [2022-04-06 20:37:24,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:24,503 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 243 transitions. [2022-04-06 20:37:24,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2022-04-06 20:37:24,503 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 243 transitions. [2022-04-06 20:37:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:37:24,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:24,504 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:24,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:24,704 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 20:37:24,705 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash 904933634, now seen corresponding path program 31 times [2022-04-06 20:37:24,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:24,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1599817728] [2022-04-06 20:37:24,706 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:24,706 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:24,706 INFO L85 PathProgramCache]: Analyzing trace with hash 904933634, now seen corresponding path program 32 times [2022-04-06 20:37:24,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:24,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073463428] [2022-04-06 20:37:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:24,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:24,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:37:24,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:24,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073463428] [2022-04-06 20:37:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073463428] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319977001] [2022-04-06 20:37:24,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:24,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:24,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:24,826 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:24,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:37:24,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:24,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:24,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:37:24,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:37:24,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:37:25,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319977001] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:25,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:25,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:37:25,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:25,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1599817728] [2022-04-06 20:37:25,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1599817728] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:25,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:25,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:37:25,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550465880] [2022-04-06 20:37:25,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:25,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:37:25,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:25,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:37:25,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:37:25,124 INFO L87 Difference]: Start difference. First operand 191 states and 243 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:25,598 INFO L93 Difference]: Finished difference Result 300 states and 376 transitions. [2022-04-06 20:37:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:37:25,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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 32 [2022-04-06 20:37:25,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:25,599 INFO L225 Difference]: With dead ends: 300 [2022-04-06 20:37:25,599 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 20:37:25,600 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:37:25,601 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:25,601 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 80 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 20:37:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 191. [2022-04-06 20:37:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.2795698924731183) internal successors, (238), 186 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 242 transitions. [2022-04-06 20:37:25,648 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 242 transitions. Word has length 32 [2022-04-06 20:37:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:25,648 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 242 transitions. [2022-04-06 20:37:25,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 242 transitions. [2022-04-06 20:37:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:37:25,649 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:25,649 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:25,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 20:37:25,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:37:25,861 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1321483054, now seen corresponding path program 33 times [2022-04-06 20:37:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:25,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [665020365] [2022-04-06 20:37:25,862 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:25,863 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:25,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1321483054, now seen corresponding path program 34 times [2022-04-06 20:37:25,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:25,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840758928] [2022-04-06 20:37:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:25,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:26,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:26,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840758928] [2022-04-06 20:37:26,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840758928] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525041010] [2022-04-06 20:37:26,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:26,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:26,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:26,065 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:26,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:37:26,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:26,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:26,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:37:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:26,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:26,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525041010] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:26,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:26,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:37:26,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:26,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [665020365] [2022-04-06 20:37:26,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [665020365] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:26,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:26,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:37:26,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620258620] [2022-04-06 20:37:26,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:26,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:37:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:37:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:37:26,542 INFO L87 Difference]: Start difference. First operand 191 states and 242 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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) [2022-04-06 20:37:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:27,681 INFO L93 Difference]: Finished difference Result 430 states and 598 transitions. [2022-04-06 20:37:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:37:27,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 32 [2022-04-06 20:37:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:27,683 INFO L225 Difference]: With dead ends: 430 [2022-04-06 20:37:27,683 INFO L226 Difference]: Without dead ends: 407 [2022-04-06 20:37:27,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=2167, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:37:27,684 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 128 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:27,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 158 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:37:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-04-06 20:37:27,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 203. [2022-04-06 20:37:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.2878787878787878) internal successors, (255), 198 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 259 transitions. [2022-04-06 20:37:27,735 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 259 transitions. Word has length 32 [2022-04-06 20:37:27,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:27,735 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 259 transitions. [2022-04-06 20:37:27,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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) [2022-04-06 20:37:27,735 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 259 transitions. [2022-04-06 20:37:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:37:27,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:27,736 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:27,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 20:37:27,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:37:27,936 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:27,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1467711455, now seen corresponding path program 35 times [2022-04-06 20:37:27,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:27,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [661122664] [2022-04-06 20:37:27,938 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:27,938 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1467711455, now seen corresponding path program 36 times [2022-04-06 20:37:27,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:27,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321344754] [2022-04-06 20:37:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:27,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:28,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:28,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:28,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321344754] [2022-04-06 20:37:28,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321344754] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:28,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598864161] [2022-04-06 20:37:28,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:28,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:28,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:28,137 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:28,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:37:28,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:28,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:28,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:28,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:28,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:37:28,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598864161] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:28,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:28,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 29 [2022-04-06 20:37:28,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:28,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [661122664] [2022-04-06 20:37:28,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [661122664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:28,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:28,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:37:28,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749785995] [2022-04-06 20:37:28,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:28,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:37:28,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:37:28,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:37:28,456 INFO L87 Difference]: Start difference. First operand 203 states and 259 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:29,781 INFO L93 Difference]: Finished difference Result 457 states and 638 transitions. [2022-04-06 20:37:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:37:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 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 [2022-04-06 20:37:29,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:29,783 INFO L225 Difference]: With dead ends: 457 [2022-04-06 20:37:29,783 INFO L226 Difference]: Without dead ends: 434 [2022-04-06 20:37:29,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=2002, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:37:29,783 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 141 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:29,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 172 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:37:29,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-04-06 20:37:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 215. [2022-04-06 20:37:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.2952380952380953) internal successors, (272), 210 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 276 transitions. [2022-04-06 20:37:29,835 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 276 transitions. Word has length 33 [2022-04-06 20:37:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:29,835 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 276 transitions. [2022-04-06 20:37:29,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 276 transitions. [2022-04-06 20:37:29,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:37:29,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:29,836 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:29,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:30,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:30,052 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:30,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:30,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1655978978, now seen corresponding path program 37 times [2022-04-06 20:37:30,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:30,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [536978411] [2022-04-06 20:37:30,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:30,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:30,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1655978978, now seen corresponding path program 38 times [2022-04-06 20:37:30,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:30,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847155194] [2022-04-06 20:37:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:30,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:30,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 20:37:30,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847155194] [2022-04-06 20:37:30,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847155194] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904659861] [2022-04-06 20:37:30,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:30,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:30,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:30,183 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:30,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:37:30,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:30,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:30,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:37:30,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 20:37:30,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:37:30,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904659861] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:30,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:30,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 31 [2022-04-06 20:37:30,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [536978411] [2022-04-06 20:37:30,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [536978411] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:30,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:30,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:30,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581045640] [2022-04-06 20:37:30,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:30,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:30,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:30,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:37:30,628 INFO L87 Difference]: Start difference. First operand 215 states and 276 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:31,230 INFO L93 Difference]: Finished difference Result 314 states and 399 transitions. [2022-04-06 20:37:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:37:31,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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 34 [2022-04-06 20:37:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:31,231 INFO L225 Difference]: With dead ends: 314 [2022-04-06 20:37:31,231 INFO L226 Difference]: Without dead ends: 297 [2022-04-06 20:37:31,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=1909, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:37:31,232 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 57 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:31,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 90 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-04-06 20:37:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 215. [2022-04-06 20:37:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.2904761904761906) internal successors, (271), 210 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 275 transitions. [2022-04-06 20:37:31,288 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 275 transitions. Word has length 34 [2022-04-06 20:37:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:31,288 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 275 transitions. [2022-04-06 20:37:31,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 275 transitions. [2022-04-06 20:37:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:37:31,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:31,288 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:31,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 20:37:31,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:31,491 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1305187981, now seen corresponding path program 19 times [2022-04-06 20:37:31,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:31,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1676235805] [2022-04-06 20:37:31,493 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:31,493 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:31,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1305187981, now seen corresponding path program 20 times [2022-04-06 20:37:31,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:31,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142664710] [2022-04-06 20:37:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:31,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:31,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:37:31,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:31,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142664710] [2022-04-06 20:37:31,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142664710] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:31,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685179919] [2022-04-06 20:37:31,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:31,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:31,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:31,644 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:31,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:37:31,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:31,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:37:31,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 20:37:31,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 20:37:31,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685179919] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:31,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:31,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 22 [2022-04-06 20:37:31,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:31,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1676235805] [2022-04-06 20:37:31,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1676235805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:31,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:31,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:37:31,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464682006] [2022-04-06 20:37:31,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:31,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:37:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:31,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:37:31,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:37:31,854 INFO L87 Difference]: Start difference. First operand 215 states and 275 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:32,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:32,514 INFO L93 Difference]: Finished difference Result 314 states and 401 transitions. [2022-04-06 20:37:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:37:32,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 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 34 [2022-04-06 20:37:32,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:32,516 INFO L225 Difference]: With dead ends: 314 [2022-04-06 20:37:32,516 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 20:37:32,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:37:32,517 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 54 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:32,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 80 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 20:37:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 216. [2022-04-06 20:37:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.2843601895734598) internal successors, (271), 211 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 275 transitions. [2022-04-06 20:37:32,572 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 275 transitions. Word has length 34 [2022-04-06 20:37:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:32,573 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 275 transitions. [2022-04-06 20:37:32,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 275 transitions. [2022-04-06 20:37:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:37:32,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:32,575 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:32,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-04-06 20:37:32,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 20:37:32,791 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1620223476, now seen corresponding path program 39 times [2022-04-06 20:37:32,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:32,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1238055772] [2022-04-06 20:37:32,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:32,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:32,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1620223476, now seen corresponding path program 40 times [2022-04-06 20:37:32,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:32,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004404881] [2022-04-06 20:37:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:32,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:32,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:37:32,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:32,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004404881] [2022-04-06 20:37:32,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004404881] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:32,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374864180] [2022-04-06 20:37:32,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:32,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:32,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:32,916 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:32,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:37:32,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:32,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:32,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:37:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:37:33,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:37:33,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374864180] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:33,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:33,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:37:33,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:33,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1238055772] [2022-04-06 20:37:33,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1238055772] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:33,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:33,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:37:33,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634634123] [2022-04-06 20:37:33,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:33,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:37:33,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:33,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:37:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:37:33,234 INFO L87 Difference]: Start difference. First operand 216 states and 275 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:33,802 INFO L93 Difference]: Finished difference Result 340 states and 427 transitions. [2022-04-06 20:37:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:37:33,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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 34 [2022-04-06 20:37:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:33,804 INFO L225 Difference]: With dead ends: 340 [2022-04-06 20:37:33,804 INFO L226 Difference]: Without dead ends: 323 [2022-04-06 20:37:33,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:37:33,804 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 69 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:33,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 91 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-04-06 20:37:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 216. [2022-04-06 20:37:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.2796208530805686) internal successors, (270), 211 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 274 transitions. [2022-04-06 20:37:33,864 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 274 transitions. Word has length 34 [2022-04-06 20:37:33,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:33,864 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 274 transitions. [2022-04-06 20:37:33,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 274 transitions. [2022-04-06 20:37:33,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:37:33,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:33,865 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:33,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:34,065 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 20:37:34,066 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:34,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:34,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2033395314, now seen corresponding path program 41 times [2022-04-06 20:37:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:34,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1961819978] [2022-04-06 20:37:34,067 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:34,067 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash 2033395314, now seen corresponding path program 42 times [2022-04-06 20:37:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:34,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416063852] [2022-04-06 20:37:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:34,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:34,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:34,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416063852] [2022-04-06 20:37:34,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416063852] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:34,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092658337] [2022-04-06 20:37:34,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:34,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:34,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:34,293 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:34,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:37:34,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:34,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:37:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:37:34,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:37:34,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092658337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:34,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:34,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 30 [2022-04-06 20:37:34,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:34,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1961819978] [2022-04-06 20:37:34,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1961819978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:34,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:34,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:37:34,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803182797] [2022-04-06 20:37:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:34,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:37:34,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:34,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:37:34,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:37:34,624 INFO L87 Difference]: Start difference. First operand 216 states and 274 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:36,163 INFO L93 Difference]: Finished difference Result 485 states and 676 transitions. [2022-04-06 20:37:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:37:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 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 34 [2022-04-06 20:37:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:36,165 INFO L225 Difference]: With dead ends: 485 [2022-04-06 20:37:36,165 INFO L226 Difference]: Without dead ends: 462 [2022-04-06 20:37:36,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=2186, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:37:36,166 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 151 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2923 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:36,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 185 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2923 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:37:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-04-06 20:37:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 228. [2022-04-06 20:37:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.2869955156950672) internal successors, (287), 223 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 291 transitions. [2022-04-06 20:37:36,226 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 291 transitions. Word has length 34 [2022-04-06 20:37:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:36,227 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 291 transitions. [2022-04-06 20:37:36,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 291 transitions. [2022-04-06 20:37:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:37:36,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:36,227 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:36,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:36,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 20:37:36,428 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:36,429 INFO L85 PathProgramCache]: Analyzing trace with hash -879664127, now seen corresponding path program 21 times [2022-04-06 20:37:36,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:36,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832240299] [2022-04-06 20:37:36,430 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:36,430 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:36,430 INFO L85 PathProgramCache]: Analyzing trace with hash -879664127, now seen corresponding path program 22 times [2022-04-06 20:37:36,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:36,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260645936] [2022-04-06 20:37:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:36,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:36,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:36,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:36,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260645936] [2022-04-06 20:37:36,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260645936] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:36,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579130003] [2022-04-06 20:37:36,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:36,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:36,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:36,602 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:36,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:37:36,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:36,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:37:36,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:37:36,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:37:36,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579130003] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:36,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:36,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2022-04-06 20:37:36,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:36,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832240299] [2022-04-06 20:37:36,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832240299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:36,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:36,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:37:36,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598754894] [2022-04-06 20:37:36,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:36,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:37:36,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:36,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:37:36,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:37:36,837 INFO L87 Difference]: Start difference. First operand 228 states and 291 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:38,483 INFO L93 Difference]: Finished difference Result 341 states and 459 transitions. [2022-04-06 20:37:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:37:38,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 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 [2022-04-06 20:37:38,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:38,484 INFO L225 Difference]: With dead ends: 341 [2022-04-06 20:37:38,484 INFO L226 Difference]: Without dead ends: 324 [2022-04-06 20:37:38,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=457, Invalid=7025, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:37:38,485 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 106 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:38,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 101 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:37:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-04-06 20:37:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 237. [2022-04-06 20:37:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.2758620689655173) internal successors, (296), 232 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 300 transitions. [2022-04-06 20:37:38,562 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 300 transitions. Word has length 35 [2022-04-06 20:37:38,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:38,563 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 300 transitions. [2022-04-06 20:37:38,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 300 transitions. [2022-04-06 20:37:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:37:38,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:38,564 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:38,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:38,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 20:37:38,779 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:38,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:38,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1905241537, now seen corresponding path program 43 times [2022-04-06 20:37:38,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:38,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [646863181] [2022-04-06 20:37:38,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:38,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1905241537, now seen corresponding path program 44 times [2022-04-06 20:37:38,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:38,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451927914] [2022-04-06 20:37:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:38,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:39,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:39,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451927914] [2022-04-06 20:37:39,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451927914] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:39,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447003808] [2022-04-06 20:37:39,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:39,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:39,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:39,042 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:39,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:37:39,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:39,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:37:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:39,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:39,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447003808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:39,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:39,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:37:39,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:39,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [646863181] [2022-04-06 20:37:39,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [646863181] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:39,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:39,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:37:39,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11435264] [2022-04-06 20:37:39,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:39,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:37:39,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:39,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:37:39,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1346, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:37:39,679 INFO L87 Difference]: Start difference. First operand 237 states and 300 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:41,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:41,427 INFO L93 Difference]: Finished difference Result 555 states and 776 transitions. [2022-04-06 20:37:41,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:37:41,427 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 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 [2022-04-06 20:37:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:41,428 INFO L225 Difference]: With dead ends: 555 [2022-04-06 20:37:41,428 INFO L226 Difference]: Without dead ends: 532 [2022-04-06 20:37:41,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=808, Invalid=2974, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:37:41,429 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 163 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3256 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 3374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:41,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 194 Invalid, 3374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3256 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:37:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-04-06 20:37:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 249. [2022-04-06 20:37:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2827868852459017) internal successors, (313), 244 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 317 transitions. [2022-04-06 20:37:41,501 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 317 transitions. Word has length 35 [2022-04-06 20:37:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:41,501 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 317 transitions. [2022-04-06 20:37:41,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 317 transitions. [2022-04-06 20:37:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:41,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:41,501 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:41,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:41,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:41,717 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash 955015874, now seen corresponding path program 13 times [2022-04-06 20:37:41,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:41,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [687947401] [2022-04-06 20:37:41,718 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:41,718 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash 955015874, now seen corresponding path program 14 times [2022-04-06 20:37:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:41,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537409123] [2022-04-06 20:37:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:41,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:41,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:37:41,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:41,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537409123] [2022-04-06 20:37:41,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537409123] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:41,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718844899] [2022-04-06 20:37:41,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:41,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:41,841 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:41,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:37:41,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:41,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:41,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:37:41,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:42,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:37:42,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718844899] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:42,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:42,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 28 [2022-04-06 20:37:42,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:42,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [687947401] [2022-04-06 20:37:42,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [687947401] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:42,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:42,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:37:42,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197888384] [2022-04-06 20:37:42,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:42,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:37:42,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:37:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:42,269 INFO L87 Difference]: Start difference. First operand 249 states and 317 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:42,540 INFO L93 Difference]: Finished difference Result 260 states and 328 transitions. [2022-04-06 20:37:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:37:42,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 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 36 [2022-04-06 20:37:42,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:42,541 INFO L225 Difference]: With dead ends: 260 [2022-04-06 20:37:42,541 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 20:37:42,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:37:42,542 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:42,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 53 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 20:37:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-04-06 20:37:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.2816326530612245) internal successors, (314), 245 states have internal predecessors, (314), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 318 transitions. [2022-04-06 20:37:42,612 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 318 transitions. Word has length 36 [2022-04-06 20:37:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:42,612 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 318 transitions. [2022-04-06 20:37:42,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 318 transitions. [2022-04-06 20:37:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:42,613 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:42,613 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:42,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:42,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-06 20:37:42,829 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash -562951837, now seen corresponding path program 23 times [2022-04-06 20:37:42,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:42,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [305628101] [2022-04-06 20:37:42,830 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:42,830 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:42,830 INFO L85 PathProgramCache]: Analyzing trace with hash -562951837, now seen corresponding path program 24 times [2022-04-06 20:37:42,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:42,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943442798] [2022-04-06 20:37:42,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:42,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:42,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:42,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:42,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943442798] [2022-04-06 20:37:42,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943442798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:42,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404988678] [2022-04-06 20:37:42,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:42,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:42,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:42,946 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:42,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:37:42,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:37:42,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:37:43,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:43,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:43,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404988678] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:43,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:43,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2022-04-06 20:37:43,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:43,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [305628101] [2022-04-06 20:37:43,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [305628101] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:43,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:43,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:37:43,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056518195] [2022-04-06 20:37:43,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:43,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:37:43,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:43,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:37:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:37:43,153 INFO L87 Difference]: Start difference. First operand 250 states and 318 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:43,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:43,544 INFO L93 Difference]: Finished difference Result 312 states and 411 transitions. [2022-04-06 20:37:43,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:37:43,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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 36 [2022-04-06 20:37:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:43,545 INFO L225 Difference]: With dead ends: 312 [2022-04-06 20:37:43,545 INFO L226 Difference]: Without dead ends: 299 [2022-04-06 20:37:43,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:43,546 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:43,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 61 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:37:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-04-06 20:37:43,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 286. [2022-04-06 20:37:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.2882562277580072) internal successors, (362), 281 states have internal predecessors, (362), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 366 transitions. [2022-04-06 20:37:43,636 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 366 transitions. Word has length 36 [2022-04-06 20:37:43,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:43,636 INFO L478 AbstractCegarLoop]: Abstraction has 286 states and 366 transitions. [2022-04-06 20:37:43,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 366 transitions. [2022-04-06 20:37:43,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:43,637 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:43,637 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:43,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:43,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 20:37:43,843 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:43,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1644820974, now seen corresponding path program 45 times [2022-04-06 20:37:43,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:43,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916623080] [2022-04-06 20:37:43,844 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:43,844 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1644820974, now seen corresponding path program 46 times [2022-04-06 20:37:43,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:43,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217302479] [2022-04-06 20:37:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:43,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:37:43,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:43,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217302479] [2022-04-06 20:37:43,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217302479] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:43,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553569805] [2022-04-06 20:37:43,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:43,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:43,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:43,979 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:43,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:37:44,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:44,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:44,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:37:44,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:37:44,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:37:44,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553569805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:44,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:44,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:37:44,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:44,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916623080] [2022-04-06 20:37:44,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916623080] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:44,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:44,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:37:44,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451456486] [2022-04-06 20:37:44,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:44,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:37:44,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:44,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:37:44,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:44,361 INFO L87 Difference]: Start difference. First operand 286 states and 366 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:45,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:45,130 INFO L93 Difference]: Finished difference Result 422 states and 532 transitions. [2022-04-06 20:37:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:37:45,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 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 36 [2022-04-06 20:37:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:45,131 INFO L225 Difference]: With dead ends: 422 [2022-04-06 20:37:45,131 INFO L226 Difference]: Without dead ends: 404 [2022-04-06 20:37:45,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:37:45,132 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 65 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:45,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 100 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-04-06 20:37:45,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 286. [2022-04-06 20:37:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.2846975088967971) internal successors, (361), 281 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 365 transitions. [2022-04-06 20:37:45,221 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 365 transitions. Word has length 36 [2022-04-06 20:37:45,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:45,221 INFO L478 AbstractCegarLoop]: Abstraction has 286 states and 365 transitions. [2022-04-06 20:37:45,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 365 transitions. [2022-04-06 20:37:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:45,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:45,222 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:45,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:45,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 20:37:45,434 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:45,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash -84969854, now seen corresponding path program 47 times [2022-04-06 20:37:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:45,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637656179] [2022-04-06 20:37:45,436 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:45,436 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:45,436 INFO L85 PathProgramCache]: Analyzing trace with hash -84969854, now seen corresponding path program 48 times [2022-04-06 20:37:45,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:45,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662630214] [2022-04-06 20:37:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:45,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:37:45,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:45,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662630214] [2022-04-06 20:37:45,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662630214] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:45,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325938961] [2022-04-06 20:37:45,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:45,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:45,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:45,571 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:45,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:37:45,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:37:45,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:37:45,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:37:45,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 20:37:45,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325938961] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:45,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:45,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:37:45,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:45,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637656179] [2022-04-06 20:37:45,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637656179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:45,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:45,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:37:45,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177008417] [2022-04-06 20:37:45,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:45,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:37:45,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:37:45,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:45,961 INFO L87 Difference]: Start difference. First operand 286 states and 365 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:46,778 INFO L93 Difference]: Finished difference Result 451 states and 565 transitions. [2022-04-06 20:37:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:37:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 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 36 [2022-04-06 20:37:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:46,780 INFO L225 Difference]: With dead ends: 451 [2022-04-06 20:37:46,780 INFO L226 Difference]: Without dead ends: 433 [2022-04-06 20:37:46,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=1432, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:37:46,781 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 79 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:46,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 112 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:37:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-04-06 20:37:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 286. [2022-04-06 20:37:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.2811387900355873) internal successors, (360), 281 states have internal predecessors, (360), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 364 transitions. [2022-04-06 20:37:46,873 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 364 transitions. Word has length 36 [2022-04-06 20:37:46,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:46,874 INFO L478 AbstractCegarLoop]: Abstraction has 286 states and 364 transitions. [2022-04-06 20:37:46,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:46,874 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 364 transitions. [2022-04-06 20:37:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:37:46,874 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:46,874 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:46,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:47,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:47,090 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:47,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:47,091 INFO L85 PathProgramCache]: Analyzing trace with hash 551067666, now seen corresponding path program 49 times [2022-04-06 20:37:47,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:47,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [785569549] [2022-04-06 20:37:47,091 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:47,091 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash 551067666, now seen corresponding path program 50 times [2022-04-06 20:37:47,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:47,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258640200] [2022-04-06 20:37:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:47,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:47,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:47,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:47,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258640200] [2022-04-06 20:37:47,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258640200] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:47,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857604918] [2022-04-06 20:37:47,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:47,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:47,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:47,343 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:47,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:37:47,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:47,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:47,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:37:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:47,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:47,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857604918] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:47,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:47,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:37:47,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:47,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [785569549] [2022-04-06 20:37:47,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [785569549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:47,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:47,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:37:47,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395823752] [2022-04-06 20:37:47,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:47,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:37:47,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:47,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:37:47,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:37:47,980 INFO L87 Difference]: Start difference. First operand 286 states and 364 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:49,938 INFO L93 Difference]: Finished difference Result 641 states and 899 transitions. [2022-04-06 20:37:49,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:37:49,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 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 36 [2022-04-06 20:37:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:49,940 INFO L225 Difference]: With dead ends: 641 [2022-04-06 20:37:49,940 INFO L226 Difference]: Without dead ends: 616 [2022-04-06 20:37:49,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=889, Invalid=3271, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:37:49,941 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 173 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3646 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 3775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:49,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 205 Invalid, 3775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3646 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:37:49,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-04-06 20:37:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 300. [2022-04-06 20:37:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.2881355932203389) internal successors, (380), 295 states have internal predecessors, (380), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 384 transitions. [2022-04-06 20:37:50,057 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 384 transitions. Word has length 36 [2022-04-06 20:37:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:50,057 INFO L478 AbstractCegarLoop]: Abstraction has 300 states and 384 transitions. [2022-04-06 20:37:50,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 384 transitions. [2022-04-06 20:37:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:37:50,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:50,058 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:50,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 20:37:50,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:50,275 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:50,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:50,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1464011024, now seen corresponding path program 15 times [2022-04-06 20:37:50,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:50,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1866862477] [2022-04-06 20:37:50,276 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:50,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:50,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1464011024, now seen corresponding path program 16 times [2022-04-06 20:37:50,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:50,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587018142] [2022-04-06 20:37:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:50,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:50,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:50,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:50,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587018142] [2022-04-06 20:37:50,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587018142] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:50,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658015949] [2022-04-06 20:37:50,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:50,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:50,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:50,357 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:50,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:37:50,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:37:50,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:50,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:50,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658015949] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:50,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:50,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-04-06 20:37:50,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:50,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1866862477] [2022-04-06 20:37:50,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1866862477] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:50,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:50,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:37:50,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832793187] [2022-04-06 20:37:50,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:50,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:37:50,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:50,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:37:50,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:37:50,508 INFO L87 Difference]: Start difference. First operand 300 states and 384 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:50,743 INFO L93 Difference]: Finished difference Result 317 states and 403 transitions. [2022-04-06 20:37:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:37:50,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 37 [2022-04-06 20:37:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:50,744 INFO L225 Difference]: With dead ends: 317 [2022-04-06 20:37:50,744 INFO L226 Difference]: Without dead ends: 288 [2022-04-06 20:37:50,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:37:50,745 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:50,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:37:50,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-04-06 20:37:50,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2022-04-06 20:37:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.2974910394265233) internal successors, (362), 279 states have internal predecessors, (362), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 366 transitions. [2022-04-06 20:37:50,841 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 366 transitions. Word has length 37 [2022-04-06 20:37:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:50,841 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 366 transitions. [2022-04-06 20:37:50,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 366 transitions. [2022-04-06 20:37:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:37:50,842 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:50,842 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:50,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:51,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:51,049 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1702220111, now seen corresponding path program 25 times [2022-04-06 20:37:51,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:51,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2034294544] [2022-04-06 20:37:51,050 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:51,050 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:51,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1702220111, now seen corresponding path program 26 times [2022-04-06 20:37:51,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:51,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354205119] [2022-04-06 20:37:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:51,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:51,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:37:51,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354205119] [2022-04-06 20:37:51,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354205119] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709995083] [2022-04-06 20:37:51,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:51,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:51,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:51,229 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:51,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:37:51,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:51,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:37:51,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:51,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:37:51,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709995083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:51,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:51,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2022-04-06 20:37:51,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:51,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2034294544] [2022-04-06 20:37:51,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2034294544] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:51,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:51,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:37:51,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217339512] [2022-04-06 20:37:51,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:51,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:37:51,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:37:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:37:51,485 INFO L87 Difference]: Start difference. First operand 284 states and 366 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:52,493 INFO L93 Difference]: Finished difference Result 413 states and 525 transitions. [2022-04-06 20:37:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:37:52,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 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 37 [2022-04-06 20:37:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:52,495 INFO L225 Difference]: With dead ends: 413 [2022-04-06 20:37:52,495 INFO L226 Difference]: Without dead ends: 370 [2022-04-06 20:37:52,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=2327, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:37:52,495 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 55 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:52,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 108 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:37:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-04-06 20:37:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 285. [2022-04-06 20:37:52,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.2892857142857144) internal successors, (361), 280 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 365 transitions. [2022-04-06 20:37:52,591 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 365 transitions. Word has length 37 [2022-04-06 20:37:52,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:52,591 INFO L478 AbstractCegarLoop]: Abstraction has 285 states and 365 transitions. [2022-04-06 20:37:52,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 365 transitions. [2022-04-06 20:37:52,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:37:52,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:52,592 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:52,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:52,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 20:37:52,792 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:52,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:52,793 INFO L85 PathProgramCache]: Analyzing trace with hash -612758369, now seen corresponding path program 51 times [2022-04-06 20:37:52,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:52,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [427261641] [2022-04-06 20:37:52,793 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:52,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:52,793 INFO L85 PathProgramCache]: Analyzing trace with hash -612758369, now seen corresponding path program 52 times [2022-04-06 20:37:52,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:52,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207355941] [2022-04-06 20:37:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:52,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:53,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:53,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:53,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207355941] [2022-04-06 20:37:53,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207355941] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:53,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97314967] [2022-04-06 20:37:53,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:53,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:53,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:53,076 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:53,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:37:53,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:53,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:53,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:37:53,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:53,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:53,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97314967] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:53,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:53,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:37:53,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [427261641] [2022-04-06 20:37:53,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [427261641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:53,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:53,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:37:53,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978725476] [2022-04-06 20:37:53,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:53,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:37:53,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:37:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:37:53,827 INFO L87 Difference]: Start difference. First operand 285 states and 365 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:56,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:56,140 INFO L93 Difference]: Finished difference Result 641 states and 897 transitions. [2022-04-06 20:37:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:37:56,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 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 37 [2022-04-06 20:37:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:56,142 INFO L225 Difference]: With dead ends: 641 [2022-04-06 20:37:56,142 INFO L226 Difference]: Without dead ends: 615 [2022-04-06 20:37:56,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=974, Invalid=3582, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:37:56,143 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 173 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4018 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 4145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 4018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:56,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 215 Invalid, 4145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 4018 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:37:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-04-06 20:37:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 299. [2022-04-06 20:37:56,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.2959183673469388) internal successors, (381), 294 states have internal predecessors, (381), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 385 transitions. [2022-04-06 20:37:56,240 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 385 transitions. Word has length 37 [2022-04-06 20:37:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:56,240 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 385 transitions. [2022-04-06 20:37:56,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 385 transitions. [2022-04-06 20:37:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:37:56,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:56,241 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:56,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 20:37:56,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 20:37:56,441 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:56,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2053708003, now seen corresponding path program 27 times [2022-04-06 20:37:56,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:56,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1333105995] [2022-04-06 20:37:56,443 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:56,443 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:56,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2053708003, now seen corresponding path program 28 times [2022-04-06 20:37:56,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:56,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553443341] [2022-04-06 20:37:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:56,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:56,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:56,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:56,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553443341] [2022-04-06 20:37:56,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553443341] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:56,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764741995] [2022-04-06 20:37:56,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:56,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:56,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:56,664 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:56,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:37:56,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:56,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:56,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:37:56,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:37:56,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:37:56,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764741995] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:56,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:56,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-04-06 20:37:56,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:56,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1333105995] [2022-04-06 20:37:56,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1333105995] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:56,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:56,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:37:56,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607997324] [2022-04-06 20:37:56,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:56,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:37:56,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:56,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:37:56,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:37:56,931 INFO L87 Difference]: Start difference. First operand 299 states and 385 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:59,297 INFO L93 Difference]: Finished difference Result 434 states and 586 transitions. [2022-04-06 20:37:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:37:59,298 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 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 38 [2022-04-06 20:37:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:59,299 INFO L225 Difference]: With dead ends: 434 [2022-04-06 20:37:59,299 INFO L226 Difference]: Without dead ends: 416 [2022-04-06 20:37:59,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=571, Invalid=10559, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:37:59,300 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 97 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:59,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 119 Invalid, 2681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:37:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-04-06 20:37:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 309. [2022-04-06 20:37:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.2861842105263157) internal successors, (391), 304 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 395 transitions. [2022-04-06 20:37:59,408 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 395 transitions. Word has length 38 [2022-04-06 20:37:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:59,408 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 395 transitions. [2022-04-06 20:37:59,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 395 transitions. [2022-04-06 20:37:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:37:59,409 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:59,409 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:59,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:59,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-04-06 20:37:59,624 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash -770615006, now seen corresponding path program 53 times [2022-04-06 20:37:59,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:59,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [580256801] [2022-04-06 20:37:59,625 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:59,625 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:59,625 INFO L85 PathProgramCache]: Analyzing trace with hash -770615006, now seen corresponding path program 54 times [2022-04-06 20:37:59,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:59,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732607113] [2022-04-06 20:37:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:59,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:59,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:37:59,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:59,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732607113] [2022-04-06 20:37:59,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732607113] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:59,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776459196] [2022-04-06 20:37:59,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:59,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:59,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:59,769 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:59,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:37:59,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:37:59,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:59,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:37:59,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:37:59,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:00,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776459196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:00,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:00,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:38:00,187 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:00,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [580256801] [2022-04-06 20:38:00,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [580256801] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:00,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:00,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:38:00,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530706732] [2022-04-06 20:38:00,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:00,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:38:00,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:00,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:38:00,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:38:00,188 INFO L87 Difference]: Start difference. First operand 309 states and 395 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:01,192 INFO L93 Difference]: Finished difference Result 472 states and 598 transitions. [2022-04-06 20:38:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:38:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 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 38 [2022-04-06 20:38:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:01,194 INFO L225 Difference]: With dead ends: 472 [2022-04-06 20:38:01,194 INFO L226 Difference]: Without dead ends: 453 [2022-04-06 20:38:01,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=1879, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:38:01,194 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:01,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 113 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-04-06 20:38:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 309. [2022-04-06 20:38:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.2828947368421053) internal successors, (390), 304 states have internal predecessors, (390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 394 transitions. [2022-04-06 20:38:01,307 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 394 transitions. Word has length 38 [2022-04-06 20:38:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:01,307 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 394 transitions. [2022-04-06 20:38:01,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 394 transitions. [2022-04-06 20:38:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:38:01,308 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:01,308 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:01,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:01,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-04-06 20:38:01,510 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1286566156, now seen corresponding path program 55 times [2022-04-06 20:38:01,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:01,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [847723303] [2022-04-06 20:38:01,511 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:01,512 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1286566156, now seen corresponding path program 56 times [2022-04-06 20:38:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717750309] [2022-04-06 20:38:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:01,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 20:38:01,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:01,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717750309] [2022-04-06 20:38:01,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717750309] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293036819] [2022-04-06 20:38:01,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:01,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:01,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:01,657 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:01,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:38:01,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:01,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:01,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:38:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:01,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:02,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293036819] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:02,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:02,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 44 [2022-04-06 20:38:02,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:02,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [847723303] [2022-04-06 20:38:02,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [847723303] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:02,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:02,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:38:02,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477182928] [2022-04-06 20:38:02,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:02,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:38:02,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:02,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:38:02,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1596, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:38:02,375 INFO L87 Difference]: Start difference. First operand 309 states and 394 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:03,618 INFO L93 Difference]: Finished difference Result 503 states and 633 transitions. [2022-04-06 20:38:03,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:38:03,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 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 38 [2022-04-06 20:38:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:03,620 INFO L225 Difference]: With dead ends: 503 [2022-04-06 20:38:03,620 INFO L226 Difference]: Without dead ends: 484 [2022-04-06 20:38:03,621 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:38:03,621 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 82 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:03,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 115 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:03,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-04-06 20:38:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 309. [2022-04-06 20:38:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.2796052631578947) internal successors, (389), 304 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 393 transitions. [2022-04-06 20:38:03,777 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 393 transitions. Word has length 38 [2022-04-06 20:38:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:03,778 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 393 transitions. [2022-04-06 20:38:03,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 393 transitions. [2022-04-06 20:38:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:38:03,778 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:03,778 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:03,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 20:38:03,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-04-06 20:38:03,979 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1963340210, now seen corresponding path program 57 times [2022-04-06 20:38:03,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:03,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [919113395] [2022-04-06 20:38:03,980 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:03,981 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:03,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1963340210, now seen corresponding path program 58 times [2022-04-06 20:38:03,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:03,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933977952] [2022-04-06 20:38:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:03,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:04,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:04,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933977952] [2022-04-06 20:38:04,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933977952] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387203072] [2022-04-06 20:38:04,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:04,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:04,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:04,322 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:04,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:38:04,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:04,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:04,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:38:04,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:04,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:05,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387203072] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:05,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:05,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:38:05,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:05,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [919113395] [2022-04-06 20:38:05,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [919113395] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:05,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:05,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:38:05,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137844703] [2022-04-06 20:38:05,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:05,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:38:05,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:38:05,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=1757, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:38:05,269 INFO L87 Difference]: Start difference. First operand 309 states and 393 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:08,308 INFO L93 Difference]: Finished difference Result 722 states and 1011 transitions. [2022-04-06 20:38:08,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:38:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 38 [2022-04-06 20:38:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:08,310 INFO L225 Difference]: With dead ends: 722 [2022-04-06 20:38:08,310 INFO L226 Difference]: Without dead ends: 696 [2022-04-06 20:38:08,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1063, Invalid=3907, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:38:08,310 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 184 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4450 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 4584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:08,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 226 Invalid, 4584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 4450 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:38:08,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-04-06 20:38:08,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 323. [2022-04-06 20:38:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.2861635220125787) internal successors, (409), 318 states have internal predecessors, (409), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 413 transitions. [2022-04-06 20:38:08,427 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 413 transitions. Word has length 38 [2022-04-06 20:38:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:08,428 INFO L478 AbstractCegarLoop]: Abstraction has 323 states and 413 transitions. [2022-04-06 20:38:08,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 413 transitions. [2022-04-06 20:38:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:38:08,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:08,428 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:08,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:08,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 20:38:08,645 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:08,645 INFO L85 PathProgramCache]: Analyzing trace with hash -445243775, now seen corresponding path program 29 times [2022-04-06 20:38:08,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:08,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [737138642] [2022-04-06 20:38:08,646 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:08,646 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:08,646 INFO L85 PathProgramCache]: Analyzing trace with hash -445243775, now seen corresponding path program 30 times [2022-04-06 20:38:08,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:08,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239911811] [2022-04-06 20:38:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:08,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:08,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:38:08,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:08,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239911811] [2022-04-06 20:38:08,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239911811] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:08,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485859715] [2022-04-06 20:38:08,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:08,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:08,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:08,856 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:08,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:38:08,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:38:08,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:08,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:38:08,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:38:09,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:38:09,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485859715] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:09,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:09,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 9] total 26 [2022-04-06 20:38:09,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:09,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [737138642] [2022-04-06 20:38:09,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [737138642] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:09,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:09,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:38:09,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710042298] [2022-04-06 20:38:09,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:09,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:38:09,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:09,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:38:09,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:38:09,211 INFO L87 Difference]: Start difference. First operand 323 states and 413 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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) [2022-04-06 20:38:10,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:10,461 INFO L93 Difference]: Finished difference Result 486 states and 619 transitions. [2022-04-06 20:38:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:38:10,461 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 39 [2022-04-06 20:38:10,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:10,463 INFO L225 Difference]: With dead ends: 486 [2022-04-06 20:38:10,463 INFO L226 Difference]: Without dead ends: 440 [2022-04-06 20:38:10,463 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=2933, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:38:10,463 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 70 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:10,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 98 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-04-06 20:38:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 324. [2022-04-06 20:38:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 319 states have (on average 1.2789968652037618) internal successors, (408), 319 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 412 transitions. [2022-04-06 20:38:10,583 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 412 transitions. Word has length 39 [2022-04-06 20:38:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:10,583 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 412 transitions. [2022-04-06 20:38:10,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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) [2022-04-06 20:38:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 412 transitions. [2022-04-06 20:38:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:38:10,584 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:10,584 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:10,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:10,784 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:10,785 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash 218017535, now seen corresponding path program 59 times [2022-04-06 20:38:10,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:10,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1152988072] [2022-04-06 20:38:10,786 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:10,786 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash 218017535, now seen corresponding path program 60 times [2022-04-06 20:38:10,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:10,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201285657] [2022-04-06 20:38:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:10,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:11,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:11,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201285657] [2022-04-06 20:38:11,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201285657] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549971321] [2022-04-06 20:38:11,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:11,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:11,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:11,081 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:11,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:38:11,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:11,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:11,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:38:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:38:11,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:38:11,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549971321] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:11,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:11,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8, 8] total 35 [2022-04-06 20:38:11,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:11,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1152988072] [2022-04-06 20:38:11,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1152988072] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:11,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:11,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:38:11,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784129656] [2022-04-06 20:38:11,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:11,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:38:11,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:38:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1109, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:38:11,435 INFO L87 Difference]: Start difference. First operand 324 states and 412 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:14,334 INFO L93 Difference]: Finished difference Result 756 states and 1059 transitions. [2022-04-06 20:38:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:38:14,334 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 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 39 [2022-04-06 20:38:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:14,336 INFO L225 Difference]: With dead ends: 756 [2022-04-06 20:38:14,336 INFO L226 Difference]: Without dead ends: 730 [2022-04-06 20:38:14,336 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=3226, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:38:14,337 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 195 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4690 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 4831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 4690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:14,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 232 Invalid, 4831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 4690 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:38:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-04-06 20:38:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 338. [2022-04-06 20:38:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 333 states have (on average 1.2852852852852852) internal successors, (428), 333 states have internal predecessors, (428), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 432 transitions. [2022-04-06 20:38:14,457 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 432 transitions. Word has length 39 [2022-04-06 20:38:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:14,458 INFO L478 AbstractCegarLoop]: Abstraction has 338 states and 432 transitions. [2022-04-06 20:38:14,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 432 transitions. [2022-04-06 20:38:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:14,458 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:14,458 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:14,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:14,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:14,662 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:14,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:14,662 INFO L85 PathProgramCache]: Analyzing trace with hash -236102046, now seen corresponding path program 31 times [2022-04-06 20:38:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:14,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [924824521] [2022-04-06 20:38:14,663 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:14,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash -236102046, now seen corresponding path program 32 times [2022-04-06 20:38:14,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:14,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591954269] [2022-04-06 20:38:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:14,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:14,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:14,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:14,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591954269] [2022-04-06 20:38:14,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591954269] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:14,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412143361] [2022-04-06 20:38:14,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:14,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:14,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:14,802 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:14,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:38:14,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:14,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:14,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:38:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:14,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:38:15,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412143361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:15,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:15,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2022-04-06 20:38:15,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:15,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [924824521] [2022-04-06 20:38:15,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [924824521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:15,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:15,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:38:15,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226168110] [2022-04-06 20:38:15,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:15,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:38:15,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:38:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:38:15,043 INFO L87 Difference]: Start difference. First operand 338 states and 432 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:15,628 INFO L93 Difference]: Finished difference Result 411 states and 542 transitions. [2022-04-06 20:38:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:38:15,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 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 40 [2022-04-06 20:38:15,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:15,629 INFO L225 Difference]: With dead ends: 411 [2022-04-06 20:38:15,629 INFO L226 Difference]: Without dead ends: 397 [2022-04-06 20:38:15,629 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:38:15,638 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:15,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 54 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:38:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-04-06 20:38:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 381. [2022-04-06 20:38:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 376 states have (on average 1.2898936170212767) internal successors, (485), 376 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 489 transitions. [2022-04-06 20:38:15,798 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 489 transitions. Word has length 40 [2022-04-06 20:38:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:15,798 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 489 transitions. [2022-04-06 20:38:15,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 489 transitions. [2022-04-06 20:38:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:15,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:15,799 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:15,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:16,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:16,007 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:16,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1040873587, now seen corresponding path program 33 times [2022-04-06 20:38:16,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:16,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1807661538] [2022-04-06 20:38:16,008 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:16,008 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1040873587, now seen corresponding path program 34 times [2022-04-06 20:38:16,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:16,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336674540] [2022-04-06 20:38:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:16,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:16,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:38:16,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:16,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336674540] [2022-04-06 20:38:16,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336674540] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:16,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226395790] [2022-04-06 20:38:16,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:16,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:16,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:16,225 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:16,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:38:16,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:16,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:16,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:38:16,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 20:38:16,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 20:38:16,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226395790] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:16,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:16,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-04-06 20:38:16,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:16,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1807661538] [2022-04-06 20:38:16,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1807661538] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:16,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:16,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:38:16,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323117646] [2022-04-06 20:38:16,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:16,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:38:16,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:38:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:38:16,511 INFO L87 Difference]: Start difference. First operand 381 states and 489 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:17,983 INFO L93 Difference]: Finished difference Result 510 states and 655 transitions. [2022-04-06 20:38:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:38:17,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 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 40 [2022-04-06 20:38:17,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:17,985 INFO L225 Difference]: With dead ends: 510 [2022-04-06 20:38:17,985 INFO L226 Difference]: Without dead ends: 492 [2022-04-06 20:38:17,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=3610, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:38:17,985 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:17,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 113 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-04-06 20:38:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 382. [2022-04-06 20:38:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.2891246684350133) internal successors, (486), 377 states have internal predecessors, (486), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 490 transitions. [2022-04-06 20:38:18,143 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 490 transitions. Word has length 40 [2022-04-06 20:38:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:18,143 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 490 transitions. [2022-04-06 20:38:18,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 490 transitions. [2022-04-06 20:38:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:18,144 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:18,144 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:18,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 20:38:18,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-04-06 20:38:18,345 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash -286560430, now seen corresponding path program 61 times [2022-04-06 20:38:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1307721433] [2022-04-06 20:38:18,346 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:18,346 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash -286560430, now seen corresponding path program 62 times [2022-04-06 20:38:18,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:18,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850279374] [2022-04-06 20:38:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:18,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:18,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 20:38:18,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:18,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850279374] [2022-04-06 20:38:18,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850279374] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:18,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486480092] [2022-04-06 20:38:18,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:18,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:18,509 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:18,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:38:18,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:18,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:18,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:38:18,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:38:18,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:38:19,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486480092] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:19,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:19,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 44 [2022-04-06 20:38:19,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:19,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1307721433] [2022-04-06 20:38:19,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1307721433] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:19,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:19,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:38:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735152033] [2022-04-06 20:38:19,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:19,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:38:19,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:38:19,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1596, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:38:19,214 INFO L87 Difference]: Start difference. First operand 382 states and 490 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:20,524 INFO L93 Difference]: Finished difference Result 573 states and 720 transitions. [2022-04-06 20:38:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:38:20,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 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 40 [2022-04-06 20:38:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:20,526 INFO L225 Difference]: With dead ends: 573 [2022-04-06 20:38:20,526 INFO L226 Difference]: Without dead ends: 553 [2022-04-06 20:38:20,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=672, Invalid=3360, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:38:20,527 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 80 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:20,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 119 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-04-06 20:38:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 382. [2022-04-06 20:38:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.2864721485411141) internal successors, (485), 377 states have internal predecessors, (485), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:20,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 489 transitions. [2022-04-06 20:38:20,684 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 489 transitions. Word has length 40 [2022-04-06 20:38:20,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:20,684 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 489 transitions. [2022-04-06 20:38:20,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:20,684 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 489 transitions. [2022-04-06 20:38:20,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:20,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:20,685 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:20,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:20,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-04-06 20:38:20,891 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash -727872510, now seen corresponding path program 63 times [2022-04-06 20:38:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:20,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236684222] [2022-04-06 20:38:20,892 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:20,892 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:20,892 INFO L85 PathProgramCache]: Analyzing trace with hash -727872510, now seen corresponding path program 64 times [2022-04-06 20:38:20,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:20,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111722544] [2022-04-06 20:38:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:20,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:21,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:38:21,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:21,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111722544] [2022-04-06 20:38:21,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111722544] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:21,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574665933] [2022-04-06 20:38:21,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:21,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:21,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:21,071 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:21,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:38:21,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:21,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:21,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:38:21,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:38:21,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 20:38:21,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574665933] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:21,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:21,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:38:21,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:21,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236684222] [2022-04-06 20:38:21,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236684222] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:21,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:21,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:38:21,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035110191] [2022-04-06 20:38:21,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:21,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:38:21,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:38:21,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:38:21,469 INFO L87 Difference]: Start difference. First operand 382 states and 489 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:22,722 INFO L93 Difference]: Finished difference Result 606 states and 757 transitions. [2022-04-06 20:38:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:38:22,723 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 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 40 [2022-04-06 20:38:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:22,724 INFO L225 Difference]: With dead ends: 606 [2022-04-06 20:38:22,724 INFO L226 Difference]: Without dead ends: 586 [2022-04-06 20:38:22,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=482, Invalid=1870, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:38:22,725 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 92 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:22,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 121 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:22,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-04-06 20:38:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 382. [2022-04-06 20:38:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.2838196286472148) internal successors, (484), 377 states have internal predecessors, (484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 488 transitions. [2022-04-06 20:38:22,886 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 488 transitions. Word has length 40 [2022-04-06 20:38:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:22,886 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 488 transitions. [2022-04-06 20:38:22,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 488 transitions. [2022-04-06 20:38:22,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:38:22,887 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:22,887 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:22,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:23,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:23,104 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1947589458, now seen corresponding path program 65 times [2022-04-06 20:38:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:23,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1862907780] [2022-04-06 20:38:23,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:23,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:23,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1947589458, now seen corresponding path program 66 times [2022-04-06 20:38:23,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:23,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460342446] [2022-04-06 20:38:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:23,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:23,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:23,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:23,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460342446] [2022-04-06 20:38:23,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460342446] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:23,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094091179] [2022-04-06 20:38:23,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:23,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:23,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:23,453 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:23,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:38:23,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:23,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:38:23,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:38:23,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 20:38:23,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094091179] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:23,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:23,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 8, 8] total 36 [2022-04-06 20:38:23,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:23,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1862907780] [2022-04-06 20:38:23,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1862907780] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:23,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:23,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:38:23,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953302270] [2022-04-06 20:38:23,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:23,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:38:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:38:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:38:23,839 INFO L87 Difference]: Start difference. First operand 382 states and 488 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:27,221 INFO L93 Difference]: Finished difference Result 858 states and 1206 transitions. [2022-04-06 20:38:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:38:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 26 states have internal predecessors, (36), 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 40 [2022-04-06 20:38:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:27,224 INFO L225 Difference]: With dead ends: 858 [2022-04-06 20:38:27,224 INFO L226 Difference]: Without dead ends: 830 [2022-04-06 20:38:27,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=3458, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:38:27,225 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 207 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 5333 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 5487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 5333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:27,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 246 Invalid, 5487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 5333 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:38:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-04-06 20:38:27,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 398. [2022-04-06 20:38:27,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 393 states have (on average 1.2900763358778626) internal successors, (507), 393 states have internal predecessors, (507), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:27,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 511 transitions. [2022-04-06 20:38:27,393 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 511 transitions. Word has length 40 [2022-04-06 20:38:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:27,393 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 511 transitions. [2022-04-06 20:38:27,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 511 transitions. [2022-04-06 20:38:27,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:38:27,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:27,394 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:27,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 20:38:27,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:27,607 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:27,607 INFO L85 PathProgramCache]: Analyzing trace with hash -264974095, now seen corresponding path program 17 times [2022-04-06 20:38:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2108922872] [2022-04-06 20:38:27,608 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:27,608 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash -264974095, now seen corresponding path program 18 times [2022-04-06 20:38:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:27,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174798336] [2022-04-06 20:38:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:27,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:27,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:38:27,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:27,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174798336] [2022-04-06 20:38:27,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174798336] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:27,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720988407] [2022-04-06 20:38:27,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:27,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:27,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:27,739 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:27,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:38:27,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:38:27,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 20:38:27,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:28,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:38:28,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720988407] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:28,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:28,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 30, 25] total 55 [2022-04-06 20:38:28,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2108922872] [2022-04-06 20:38:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2108922872] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:28,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:28,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:38:28,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53932418] [2022-04-06 20:38:28,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:28,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:38:28,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:28,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:38:28,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=2466, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:38:28,932 INFO L87 Difference]: Start difference. First operand 398 states and 511 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:29,372 INFO L93 Difference]: Finished difference Result 410 states and 523 transitions. [2022-04-06 20:38:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:38:29,373 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 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 41 [2022-04-06 20:38:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:29,379 INFO L225 Difference]: With dead ends: 410 [2022-04-06 20:38:29,379 INFO L226 Difference]: Without dead ends: 399 [2022-04-06 20:38:29,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=3346, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:38:29,380 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:29,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:29,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-04-06 20:38:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2022-04-06 20:38:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 394 states have (on average 1.2893401015228427) internal successors, (508), 394 states have internal predecessors, (508), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 512 transitions. [2022-04-06 20:38:29,543 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 512 transitions. Word has length 41 [2022-04-06 20:38:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:29,543 INFO L478 AbstractCegarLoop]: Abstraction has 399 states and 512 transitions. [2022-04-06 20:38:29,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 512 transitions. [2022-04-06 20:38:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:38:29,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:29,544 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:29,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:29,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 20:38:29,744 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:29,745 INFO L85 PathProgramCache]: Analyzing trace with hash -134128447, now seen corresponding path program 35 times [2022-04-06 20:38:29,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:29,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779211075] [2022-04-06 20:38:29,745 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:29,745 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:29,745 INFO L85 PathProgramCache]: Analyzing trace with hash -134128447, now seen corresponding path program 36 times [2022-04-06 20:38:29,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:29,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826424285] [2022-04-06 20:38:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:29,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:29,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:29,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:29,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826424285] [2022-04-06 20:38:29,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826424285] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:29,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891299759] [2022-04-06 20:38:29,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:29,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:29,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:29,975 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:29,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:38:30,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:38:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:38:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:30,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:30,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891299759] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:30,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:30,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 40 [2022-04-06 20:38:30,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:30,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779211075] [2022-04-06 20:38:30,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779211075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:30,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:30,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:38:30,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074194344] [2022-04-06 20:38:30,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:30,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:38:30,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:30,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:38:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:38:30,633 INFO L87 Difference]: Start difference. First operand 399 states and 512 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:33,651 INFO L93 Difference]: Finished difference Result 568 states and 762 transitions. [2022-04-06 20:38:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 20:38:33,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 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 41 [2022-04-06 20:38:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:33,653 INFO L225 Difference]: With dead ends: 568 [2022-04-06 20:38:33,653 INFO L226 Difference]: Without dead ends: 549 [2022-04-06 20:38:33,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4770 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2454, Invalid=16452, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:38:33,654 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 137 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3488 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 3804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 3488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:33,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 130 Invalid, 3804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 3488 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:38:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-04-06 20:38:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 410. [2022-04-06 20:38:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 405 states have (on average 1.2814814814814814) internal successors, (519), 405 states have internal predecessors, (519), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 523 transitions. [2022-04-06 20:38:33,850 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 523 transitions. Word has length 41 [2022-04-06 20:38:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:33,850 INFO L478 AbstractCegarLoop]: Abstraction has 410 states and 523 transitions. [2022-04-06 20:38:33,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 523 transitions. [2022-04-06 20:38:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:38:33,851 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:33,851 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:33,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-06 20:38:34,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 20:38:34,052 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash -270255777, now seen corresponding path program 67 times [2022-04-06 20:38:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:34,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [928504629] [2022-04-06 20:38:34,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:34,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:34,053 INFO L85 PathProgramCache]: Analyzing trace with hash -270255777, now seen corresponding path program 68 times [2022-04-06 20:38:34,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:34,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793812429] [2022-04-06 20:38:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:34,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:34,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:34,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793812429] [2022-04-06 20:38:34,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793812429] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:34,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289040094] [2022-04-06 20:38:34,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:34,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:34,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:34,378 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:34,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:38:34,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:34,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:34,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:38:34,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:34,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:35,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289040094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:35,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:35,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 25] total 51 [2022-04-06 20:38:35,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:35,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [928504629] [2022-04-06 20:38:35,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [928504629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:35,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:35,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:38:35,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631288366] [2022-04-06 20:38:35,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:35,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:38:35,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:35,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:38:35,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=1923, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:38:35,263 INFO L87 Difference]: Start difference. First operand 410 states and 523 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:39,067 INFO L93 Difference]: Finished difference Result 951 states and 1339 transitions. [2022-04-06 20:38:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:38:39,067 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 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 41 [2022-04-06 20:38:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:39,070 INFO L225 Difference]: With dead ends: 951 [2022-04-06 20:38:39,070 INFO L226 Difference]: Without dead ends: 923 [2022-04-06 20:38:39,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1335, Invalid=4517, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:38:39,070 INFO L913 BasicCegarLoop]: 130 mSDtfsCounter, 219 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 5828 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 5988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 5828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:39,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 257 Invalid, 5988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 5828 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:38:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-04-06 20:38:39,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 426. [2022-04-06 20:38:39,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 421 states have (on average 1.2874109263657958) internal successors, (542), 421 states have internal predecessors, (542), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 546 transitions. [2022-04-06 20:38:39,266 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 546 transitions. Word has length 41 [2022-04-06 20:38:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:39,266 INFO L478 AbstractCegarLoop]: Abstraction has 426 states and 546 transitions. [2022-04-06 20:38:39,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 546 transitions. [2022-04-06 20:38:39,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:38:39,267 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:39,267 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:39,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 20:38:39,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:39,468 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:39,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1741037917, now seen corresponding path program 19 times [2022-04-06 20:38:39,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:39,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [392285009] [2022-04-06 20:38:39,469 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:39,469 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1741037917, now seen corresponding path program 20 times [2022-04-06 20:38:39,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:39,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049068783] [2022-04-06 20:38:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:39,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:39,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:38:39,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:39,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049068783] [2022-04-06 20:38:39,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049068783] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:39,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881695548] [2022-04-06 20:38:39,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:39,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:39,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:39,542 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:39,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:38:39,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:39,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:38:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:39,644 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:38:39,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 20:38:39,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881695548] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:39,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:39,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-04-06 20:38:39,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:39,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [392285009] [2022-04-06 20:38:39,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [392285009] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:39,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:39,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:38:39,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474988781] [2022-04-06 20:38:39,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:39,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:38:39,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:39,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:38:39,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:38:39,710 INFO L87 Difference]: Start difference. First operand 426 states and 546 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:40,113 INFO L93 Difference]: Finished difference Result 445 states and 567 transitions. [2022-04-06 20:38:40,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:38:40,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 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 42 [2022-04-06 20:38:40,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:40,114 INFO L225 Difference]: With dead ends: 445 [2022-04-06 20:38:40,114 INFO L226 Difference]: Without dead ends: 412 [2022-04-06 20:38:40,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:38:40,115 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:40,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 63 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-04-06 20:38:40,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 407. [2022-04-06 20:38:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 402 states have (on average 1.2960199004975124) internal successors, (521), 402 states have internal predecessors, (521), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 525 transitions. [2022-04-06 20:38:40,294 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 525 transitions. Word has length 42 [2022-04-06 20:38:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:40,294 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 525 transitions. [2022-04-06 20:38:40,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 525 transitions. [2022-04-06 20:38:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:38:40,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:40,295 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:40,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 20:38:40,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:38:40,495 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:40,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2141964876, now seen corresponding path program 69 times [2022-04-06 20:38:40,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:40,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [134597003] [2022-04-06 20:38:40,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:40,496 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:40,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2141964876, now seen corresponding path program 70 times [2022-04-06 20:38:40,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:40,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540540569] [2022-04-06 20:38:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:40,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:40,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:38:40,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:40,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540540569] [2022-04-06 20:38:40,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540540569] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:40,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12149086] [2022-04-06 20:38:40,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:40,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:40,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:40,657 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:40,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:38:40,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:40,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:40,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:38:40,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:38:40,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:38:41,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12149086] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:41,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:41,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:38:41,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:41,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [134597003] [2022-04-06 20:38:41,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [134597003] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:41,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:41,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:38:41,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393056600] [2022-04-06 20:38:41,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:41,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:38:41,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:38:41,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:38:41,121 INFO L87 Difference]: Start difference. First operand 407 states and 525 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:42,495 INFO L93 Difference]: Finished difference Result 594 states and 756 transitions. [2022-04-06 20:38:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:38:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 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 42 [2022-04-06 20:38:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:42,497 INFO L225 Difference]: With dead ends: 594 [2022-04-06 20:38:42,497 INFO L226 Difference]: Without dead ends: 573 [2022-04-06 20:38:42,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=644, Invalid=2662, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:38:42,498 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 72 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:42,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 106 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-04-06 20:38:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 407. [2022-04-06 20:38:42,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 402 states have (on average 1.2935323383084578) internal successors, (520), 402 states have internal predecessors, (520), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 524 transitions. [2022-04-06 20:38:42,689 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 524 transitions. Word has length 42 [2022-04-06 20:38:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:42,689 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 524 transitions. [2022-04-06 20:38:42,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 524 transitions. [2022-04-06 20:38:42,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:38:42,690 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:42,690 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:42,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-04-06 20:38:42,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:42,891 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:42,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:42,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2055519709, now seen corresponding path program 37 times [2022-04-06 20:38:42,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:42,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1142392713] [2022-04-06 20:38:42,892 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:42,892 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:42,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2055519709, now seen corresponding path program 38 times [2022-04-06 20:38:42,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:42,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357659240] [2022-04-06 20:38:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:42,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:43,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:38:43,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:43,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357659240] [2022-04-06 20:38:43,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357659240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:43,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077855133] [2022-04-06 20:38:43,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:43,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:43,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:43,133 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:43,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:38:43,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:43,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:43,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:38:43,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 20:38:43,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 20:38:43,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077855133] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:43,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:43,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 10] total 29 [2022-04-06 20:38:43,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:43,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1142392713] [2022-04-06 20:38:43,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1142392713] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:43,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:43,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:38:43,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992251230] [2022-04-06 20:38:43,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:43,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:38:43,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:38:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:38:43,443 INFO L87 Difference]: Start difference. First operand 407 states and 524 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:45,164 INFO L93 Difference]: Finished difference Result 593 states and 757 transitions. [2022-04-06 20:38:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:38:45,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 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 42 [2022-04-06 20:38:45,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:45,166 INFO L225 Difference]: With dead ends: 593 [2022-04-06 20:38:45,166 INFO L226 Difference]: Without dead ends: 542 [2022-04-06 20:38:45,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=3858, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:38:45,166 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 70 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:45,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 111 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-04-06 20:38:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 408. [2022-04-06 20:38:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 403 states have (on average 1.2878411910669976) internal successors, (519), 403 states have internal predecessors, (519), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 523 transitions. [2022-04-06 20:38:45,363 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 523 transitions. Word has length 42 [2022-04-06 20:38:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:45,363 INFO L478 AbstractCegarLoop]: Abstraction has 408 states and 523 transitions. [2022-04-06 20:38:45,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 523 transitions. [2022-04-06 20:38:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:38:45,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:45,364 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:45,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 20:38:45,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:45,567 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash 70932066, now seen corresponding path program 71 times [2022-04-06 20:38:45,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:45,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1692572469] [2022-04-06 20:38:45,568 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:45,568 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash 70932066, now seen corresponding path program 72 times [2022-04-06 20:38:45,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:45,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182888429] [2022-04-06 20:38:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:45,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:45,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:38:45,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:45,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182888429] [2022-04-06 20:38:45,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182888429] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:45,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404831893] [2022-04-06 20:38:45,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:45,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:45,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:45,729 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:45,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:38:45,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:38:45,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:45,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:38:45,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:38:46,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:38:46,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404831893] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:46,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:46,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:38:46,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:46,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1692572469] [2022-04-06 20:38:46,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1692572469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:46,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:46,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:38:46,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347783626] [2022-04-06 20:38:46,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:46,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:38:46,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:38:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:38:46,349 INFO L87 Difference]: Start difference. First operand 408 states and 523 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:47,875 INFO L93 Difference]: Finished difference Result 629 states and 793 transitions. [2022-04-06 20:38:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:38:47,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 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 42 [2022-04-06 20:38:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:47,877 INFO L225 Difference]: With dead ends: 629 [2022-04-06 20:38:47,877 INFO L226 Difference]: Without dead ends: 608 [2022-04-06 20:38:47,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=2381, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:38:47,877 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 81 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:47,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 122 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-04-06 20:38:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 408. [2022-04-06 20:38:48,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 403 states have (on average 1.2853598014888337) internal successors, (518), 403 states have internal predecessors, (518), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 522 transitions. [2022-04-06 20:38:48,064 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 522 transitions. Word has length 42 [2022-04-06 20:38:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:48,064 INFO L478 AbstractCegarLoop]: Abstraction has 408 states and 522 transitions. [2022-04-06 20:38:48,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:48,064 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 522 transitions. [2022-04-06 20:38:48,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:38:48,065 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:48,065 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:48,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:48,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-04-06 20:38:48,266 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:48,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1943431156, now seen corresponding path program 73 times [2022-04-06 20:38:48,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:48,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [804539708] [2022-04-06 20:38:48,267 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:48,268 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:48,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1943431156, now seen corresponding path program 74 times [2022-04-06 20:38:48,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:48,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528066631] [2022-04-06 20:38:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:48,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:48,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 20:38:48,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:48,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528066631] [2022-04-06 20:38:48,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528066631] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:48,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861252223] [2022-04-06 20:38:48,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:48,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:48,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:48,431 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:48,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:38:48,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:48,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:48,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:38:48,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:48,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:49,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861252223] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:49,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:49,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 52 [2022-04-06 20:38:49,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:49,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [804539708] [2022-04-06 20:38:49,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [804539708] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:49,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:49,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:38:49,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438601663] [2022-04-06 20:38:49,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:49,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:38:49,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:49,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:38:49,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2250, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:38:49,317 INFO L87 Difference]: Start difference. First operand 408 states and 522 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:51,019 INFO L93 Difference]: Finished difference Result 664 states and 832 transitions. [2022-04-06 20:38:51,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:38:51,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 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 42 [2022-04-06 20:38:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:51,021 INFO L225 Difference]: With dead ends: 664 [2022-04-06 20:38:51,021 INFO L226 Difference]: Without dead ends: 643 [2022-04-06 20:38:51,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=747, Invalid=4083, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:38:51,021 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 94 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:51,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 134 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:51,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-04-06 20:38:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 408. [2022-04-06 20:38:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 403 states have (on average 1.28287841191067) internal successors, (517), 403 states have internal predecessors, (517), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 521 transitions. [2022-04-06 20:38:51,209 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 521 transitions. Word has length 42 [2022-04-06 20:38:51,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:51,209 INFO L478 AbstractCegarLoop]: Abstraction has 408 states and 521 transitions. [2022-04-06 20:38:51,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 521 transitions. [2022-04-06 20:38:51,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:38:51,210 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:51,210 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:51,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:51,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:51,422 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash -303981326, now seen corresponding path program 75 times [2022-04-06 20:38:51,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:51,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [730263648] [2022-04-06 20:38:51,423 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:51,423 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:51,423 INFO L85 PathProgramCache]: Analyzing trace with hash -303981326, now seen corresponding path program 76 times [2022-04-06 20:38:51,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:51,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264779578] [2022-04-06 20:38:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:51,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:51,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:51,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:51,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264779578] [2022-04-06 20:38:51,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264779578] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:51,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609180305] [2022-04-06 20:38:51,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:51,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:51,804 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:51,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:38:51,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:51,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:51,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:38:51,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:51,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:52,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609180305] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:52,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:52,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 20:38:52,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:52,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [730263648] [2022-04-06 20:38:52,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [730263648] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:52,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:52,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:38:52,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240914769] [2022-04-06 20:38:52,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:52,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:38:52,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:52,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:38:52,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=2389, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:38:52,809 INFO L87 Difference]: Start difference. First operand 408 states and 521 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:56,948 INFO L93 Difference]: Finished difference Result 949 states and 1331 transitions. [2022-04-06 20:38:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:38:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 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 42 [2022-04-06 20:38:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:56,951 INFO L225 Difference]: With dead ends: 949 [2022-04-06 20:38:56,951 INFO L226 Difference]: Without dead ends: 920 [2022-04-06 20:38:56,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1459, Invalid=5347, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:38:56,952 INFO L913 BasicCegarLoop]: 135 mSDtfsCounter, 217 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6297 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 6456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 6297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:56,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 267 Invalid, 6456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 6297 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:38:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-04-06 20:38:57,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 424. [2022-04-06 20:38:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 419 states have (on average 1.2887828162291168) internal successors, (540), 419 states have internal predecessors, (540), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 544 transitions. [2022-04-06 20:38:57,161 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 544 transitions. Word has length 42 [2022-04-06 20:38:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:57,161 INFO L478 AbstractCegarLoop]: Abstraction has 424 states and 544 transitions. [2022-04-06 20:38:57,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:57,161 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 544 transitions. [2022-04-06 20:38:57,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:38:57,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:57,162 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:57,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-04-06 20:38:57,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:57,363 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash -837643569, now seen corresponding path program 39 times [2022-04-06 20:38:57,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:57,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954343575] [2022-04-06 20:38:57,364 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:57,364 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:57,364 INFO L85 PathProgramCache]: Analyzing trace with hash -837643569, now seen corresponding path program 40 times [2022-04-06 20:38:57,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789544164] [2022-04-06 20:38:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:57,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:57,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:38:57,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:57,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789544164] [2022-04-06 20:38:57,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789544164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:57,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646630331] [2022-04-06 20:38:57,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:57,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:57,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:57,585 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:57,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:38:57,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:38:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 20:38:57,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 20:38:57,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646630331] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:57,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:57,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 31 [2022-04-06 20:38:57,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:57,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954343575] [2022-04-06 20:38:57,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954343575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:57,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:57,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:38:57,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163139461] [2022-04-06 20:38:57,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:57,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:38:57,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:57,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:38:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:38:57,914 INFO L87 Difference]: Start difference. First operand 424 states and 544 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:59,786 INFO L93 Difference]: Finished difference Result 578 states and 745 transitions. [2022-04-06 20:38:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:38:59,786 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 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 43 [2022-04-06 20:38:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:59,787 INFO L225 Difference]: With dead ends: 578 [2022-04-06 20:38:59,788 INFO L226 Difference]: Without dead ends: 559 [2022-04-06 20:38:59,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=339, Invalid=4631, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:38:59,788 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 69 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:59,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 116 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:59,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-04-06 20:38:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2022-04-06 20:38:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.2880952380952382) internal successors, (541), 420 states have internal predecessors, (541), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 545 transitions. [2022-04-06 20:38:59,980 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 545 transitions. Word has length 43 [2022-04-06 20:38:59,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:59,981 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 545 transitions. [2022-04-06 20:38:59,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 545 transitions. [2022-04-06 20:38:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:38:59,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:59,981 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:59,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:00,197 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:00,197 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:00,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1349473345, now seen corresponding path program 77 times [2022-04-06 20:39:00,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:00,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1265830989] [2022-04-06 20:39:00,198 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:00,198 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:00,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1349473345, now seen corresponding path program 78 times [2022-04-06 20:39:00,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:00,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038378921] [2022-04-06 20:39:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:00,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:00,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:39:00,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:00,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038378921] [2022-04-06 20:39:00,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038378921] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:00,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034250744] [2022-04-06 20:39:00,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:00,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:00,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:00,585 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:00,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:39:00,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:39:00,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:00,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:39:00,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:39:00,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 20:39:00,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034250744] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:00,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:00,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 8, 8] total 39 [2022-04-06 20:39:00,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:00,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1265830989] [2022-04-06 20:39:00,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1265830989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:00,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:00,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:39:00,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76734227] [2022-04-06 20:39:00,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:00,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:39:00,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:00,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:39:00,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1393, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:39:00,994 INFO L87 Difference]: Start difference. First operand 425 states and 545 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:05,463 INFO L93 Difference]: Finished difference Result 987 states and 1387 transitions. [2022-04-06 20:39:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:39:05,463 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 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 43 [2022-04-06 20:39:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:05,465 INFO L225 Difference]: With dead ends: 987 [2022-04-06 20:39:05,465 INFO L226 Difference]: Without dead ends: 958 [2022-04-06 20:39:05,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=4202, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:39:05,466 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 228 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 6835 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 7001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 6835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:05,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 278 Invalid, 7001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 6835 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:39:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-04-06 20:39:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 441. [2022-04-06 20:39:05,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 436 states have (on average 1.2935779816513762) internal successors, (564), 436 states have internal predecessors, (564), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 568 transitions. [2022-04-06 20:39:05,672 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 568 transitions. Word has length 43 [2022-04-06 20:39:05,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:05,672 INFO L478 AbstractCegarLoop]: Abstraction has 441 states and 568 transitions. [2022-04-06 20:39:05,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 568 transitions. [2022-04-06 20:39:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:39:05,673 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:05,673 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:05,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-06 20:39:05,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 20:39:05,883 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:05,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash -733099069, now seen corresponding path program 41 times [2022-04-06 20:39:05,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:05,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000706490] [2022-04-06 20:39:05,884 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:05,884 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:05,885 INFO L85 PathProgramCache]: Analyzing trace with hash -733099069, now seen corresponding path program 42 times [2022-04-06 20:39:05,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:05,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197666530] [2022-04-06 20:39:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:05,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:06,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:39:06,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:06,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197666530] [2022-04-06 20:39:06,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197666530] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:06,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045581787] [2022-04-06 20:39:06,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:06,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:06,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:06,049 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:06,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:39:06,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:39:06,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:06,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:39:06,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:39:06,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:39:06,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045581787] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:06,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:06,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2022-04-06 20:39:06,362 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:06,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1000706490] [2022-04-06 20:39:06,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1000706490] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:06,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:06,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:39:06,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158520702] [2022-04-06 20:39:06,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:06,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:39:06,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:06,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:39:06,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:39:06,363 INFO L87 Difference]: Start difference. First operand 441 states and 568 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-04-06 20:39:07,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:07,100 INFO L93 Difference]: Finished difference Result 526 states and 697 transitions. [2022-04-06 20:39:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:39:07,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 44 [2022-04-06 20:39:07,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:07,102 INFO L225 Difference]: With dead ends: 526 [2022-04-06 20:39:07,102 INFO L226 Difference]: Without dead ends: 511 [2022-04-06 20:39:07,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:39:07,103 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:07,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 52 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:39:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-04-06 20:39:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 492. [2022-04-06 20:39:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 487 states have (on average 1.297741273100616) internal successors, (632), 487 states have internal predecessors, (632), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 636 transitions. [2022-04-06 20:39:07,369 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 636 transitions. Word has length 44 [2022-04-06 20:39:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:07,369 INFO L478 AbstractCegarLoop]: Abstraction has 492 states and 636 transitions. [2022-04-06 20:39:07,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-04-06 20:39:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 636 transitions. [2022-04-06 20:39:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:39:07,370 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:07,370 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:07,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:07,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:07,583 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:07,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:07,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1738188893, now seen corresponding path program 43 times [2022-04-06 20:39:07,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:07,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [113498214] [2022-04-06 20:39:07,584 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:07,584 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:07,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1738188893, now seen corresponding path program 44 times [2022-04-06 20:39:07,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:07,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699543235] [2022-04-06 20:39:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:07,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:07,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:07,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:07,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699543235] [2022-04-06 20:39:07,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699543235] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:07,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718854533] [2022-04-06 20:39:07,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:07,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:07,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:07,865 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:07,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:39:07,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:07,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:07,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:39:07,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:39:08,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:39:08,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718854533] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:08,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:08,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12, 12] total 34 [2022-04-06 20:39:08,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:08,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [113498214] [2022-04-06 20:39:08,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [113498214] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:08,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:08,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:39:08,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171755874] [2022-04-06 20:39:08,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:08,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:39:08,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:08,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:39:08,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:39:08,286 INFO L87 Difference]: Start difference. First operand 492 states and 636 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:12,862 INFO L93 Difference]: Finished difference Result 689 states and 928 transitions. [2022-04-06 20:39:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-04-06 20:39:12,862 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 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 44 [2022-04-06 20:39:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:12,864 INFO L225 Difference]: With dead ends: 689 [2022-04-06 20:39:12,864 INFO L226 Difference]: Without dead ends: 669 [2022-04-06 20:39:12,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6802 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=855, Invalid=22097, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 20:39:12,865 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 143 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4627 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 4965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 4627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:12,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 148 Invalid, 4965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 4627 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:39:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-04-06 20:39:13,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 504. [2022-04-06 20:39:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 499 states have (on average 1.2905811623246493) internal successors, (644), 499 states have internal predecessors, (644), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 648 transitions. [2022-04-06 20:39:13,151 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 648 transitions. Word has length 44 [2022-04-06 20:39:13,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:13,152 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 648 transitions. [2022-04-06 20:39:13,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 648 transitions. [2022-04-06 20:39:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:39:13,152 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:13,153 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:13,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 20:39:13,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:13,353 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:13,353 INFO L85 PathProgramCache]: Analyzing trace with hash -740863102, now seen corresponding path program 79 times [2022-04-06 20:39:13,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:13,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78249322] [2022-04-06 20:39:13,354 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:13,354 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:13,354 INFO L85 PathProgramCache]: Analyzing trace with hash -740863102, now seen corresponding path program 80 times [2022-04-06 20:39:13,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:13,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44809293] [2022-04-06 20:39:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:13,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:13,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-04-06 20:39:13,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:13,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44809293] [2022-04-06 20:39:13,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44809293] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:13,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526669057] [2022-04-06 20:39:13,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:13,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:13,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:13,527 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:13,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:39:13,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:13,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:13,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:39:13,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:39:13,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:39:14,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526669057] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:14,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:14,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 48 [2022-04-06 20:39:14,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:14,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78249322] [2022-04-06 20:39:14,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78249322] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:14,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:14,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:39:14,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496146727] [2022-04-06 20:39:14,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:14,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:39:14,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:39:14,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:39:14,351 INFO L87 Difference]: Start difference. First operand 504 states and 648 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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) [2022-04-06 20:39:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:16,452 INFO L93 Difference]: Finished difference Result 743 states and 940 transitions. [2022-04-06 20:39:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:39:16,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 44 [2022-04-06 20:39:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:16,454 INFO L225 Difference]: With dead ends: 743 [2022-04-06 20:39:16,454 INFO L226 Difference]: Without dead ends: 721 [2022-04-06 20:39:16,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=902, Invalid=4500, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:39:16,455 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 83 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:16,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 136 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-04-06 20:39:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 504. [2022-04-06 20:39:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 499 states have (on average 1.2885771543086173) internal successors, (643), 499 states have internal predecessors, (643), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 647 transitions. [2022-04-06 20:39:16,737 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 647 transitions. Word has length 44 [2022-04-06 20:39:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:16,737 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 647 transitions. [2022-04-06 20:39:16,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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) [2022-04-06 20:39:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 647 transitions. [2022-04-06 20:39:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:39:16,738 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:16,738 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:16,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:16,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-04-06 20:39:16,939 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:16,939 INFO L85 PathProgramCache]: Analyzing trace with hash 251508882, now seen corresponding path program 81 times [2022-04-06 20:39:16,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:16,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1531092877] [2022-04-06 20:39:16,940 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:16,940 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash 251508882, now seen corresponding path program 82 times [2022-04-06 20:39:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:16,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274893610] [2022-04-06 20:39:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:16,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:17,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:39:17,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:17,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274893610] [2022-04-06 20:39:17,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274893610] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:17,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125619279] [2022-04-06 20:39:17,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:17,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:17,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:17,118 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:17,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:39:17,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:17,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:17,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:39:17,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:39:17,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:39:17,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125619279] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:17,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:17,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:39:17,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:17,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1531092877] [2022-04-06 20:39:17,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1531092877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:17,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:17,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:39:17,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26642539] [2022-04-06 20:39:17,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:17,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:39:17,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:17,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:39:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:39:17,595 INFO L87 Difference]: Start difference. First operand 504 states and 647 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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) [2022-04-06 20:39:19,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:19,688 INFO L93 Difference]: Finished difference Result 781 states and 983 transitions. [2022-04-06 20:39:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:39:19,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 44 [2022-04-06 20:39:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:19,690 INFO L225 Difference]: With dead ends: 781 [2022-04-06 20:39:19,690 INFO L226 Difference]: Without dead ends: 759 [2022-04-06 20:39:19,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=653, Invalid=2653, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:39:19,691 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:19,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 143 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-04-06 20:39:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 504. [2022-04-06 20:39:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 499 states have (on average 1.2865731462925851) internal successors, (642), 499 states have internal predecessors, (642), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 646 transitions. [2022-04-06 20:39:19,982 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 646 transitions. Word has length 44 [2022-04-06 20:39:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:19,982 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 646 transitions. [2022-04-06 20:39:19,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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) [2022-04-06 20:39:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 646 transitions. [2022-04-06 20:39:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:39:19,983 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:19,983 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:20,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 20:39:20,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:20,184 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:20,184 INFO L85 PathProgramCache]: Analyzing trace with hash 837710210, now seen corresponding path program 83 times [2022-04-06 20:39:20,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:20,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2132537718] [2022-04-06 20:39:20,185 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:20,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:20,185 INFO L85 PathProgramCache]: Analyzing trace with hash 837710210, now seen corresponding path program 84 times [2022-04-06 20:39:20,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:20,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122582534] [2022-04-06 20:39:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:20,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:20,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:39:20,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:20,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122582534] [2022-04-06 20:39:20,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122582534] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:20,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573392712] [2022-04-06 20:39:20,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:20,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:20,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:20,368 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:20,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:39:20,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:39:20,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:39:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:39:20,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:39:21,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573392712] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:21,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:21,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:39:21,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:21,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2132537718] [2022-04-06 20:39:21,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2132537718] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:21,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:21,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:39:21,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232096609] [2022-04-06 20:39:21,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:21,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:39:21,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:39:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:39:21,102 INFO L87 Difference]: Start difference. First operand 504 states and 646 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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) [2022-04-06 20:39:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:23,400 INFO L93 Difference]: Finished difference Result 820 states and 1027 transitions. [2022-04-06 20:39:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:39:23,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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 44 [2022-04-06 20:39:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:23,403 INFO L225 Difference]: With dead ends: 820 [2022-04-06 20:39:23,403 INFO L226 Difference]: Without dead ends: 798 [2022-04-06 20:39:23,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=606, Invalid=2364, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:39:23,403 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 105 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:23,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 150 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-04-06 20:39:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 504. [2022-04-06 20:39:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 499 states have (on average 1.2845691382765532) internal successors, (641), 499 states have internal predecessors, (641), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 645 transitions. [2022-04-06 20:39:23,727 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 645 transitions. Word has length 44 [2022-04-06 20:39:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:23,727 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 645 transitions. [2022-04-06 20:39:23,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 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) [2022-04-06 20:39:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 645 transitions. [2022-04-06 20:39:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:39:23,729 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:23,729 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:23,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-06 20:39:23,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:23,929 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:23,930 INFO L85 PathProgramCache]: Analyzing trace with hash 600012434, now seen corresponding path program 85 times [2022-04-06 20:39:23,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:23,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350969427] [2022-04-06 20:39:23,930 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:23,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:23,930 INFO L85 PathProgramCache]: Analyzing trace with hash 600012434, now seen corresponding path program 86 times [2022-04-06 20:39:23,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:23,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589347585] [2022-04-06 20:39:23,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:23,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:24,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:24,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:39:24,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:24,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589347585] [2022-04-06 20:39:24,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589347585] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:24,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137011413] [2022-04-06 20:39:24,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:24,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:24,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:24,362 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:24,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:39:24,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:24,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:24,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:39:24,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:39:24,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:39:25,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137011413] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:25,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:25,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:39:25,604 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:25,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350969427] [2022-04-06 20:39:25,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350969427] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:25,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:25,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:39:25,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317732246] [2022-04-06 20:39:25,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:25,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:39:25,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:39:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=2741, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:39:25,605 INFO L87 Difference]: Start difference. First operand 504 states and 645 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:30,864 INFO L93 Difference]: Finished difference Result 1168 states and 1646 transitions. [2022-04-06 20:39:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:39:30,864 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 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 44 [2022-04-06 20:39:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:30,866 INFO L225 Difference]: With dead ends: 1168 [2022-04-06 20:39:30,866 INFO L226 Difference]: Without dead ends: 1137 [2022-04-06 20:39:30,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1681, Invalid=6151, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:39:30,867 INFO L913 BasicCegarLoop]: 147 mSDtfsCounter, 239 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 7130 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 7306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 7130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:30,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 284 Invalid, 7306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 7130 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:39:30,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-04-06 20:39:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 522. [2022-04-06 20:39:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 517 states have (on average 1.2901353965183753) internal successors, (667), 517 states have internal predecessors, (667), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 671 transitions. [2022-04-06 20:39:31,169 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 671 transitions. Word has length 44 [2022-04-06 20:39:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:31,169 INFO L478 AbstractCegarLoop]: Abstraction has 522 states and 671 transitions. [2022-04-06 20:39:31,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 671 transitions. [2022-04-06 20:39:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:39:31,170 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:31,170 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:31,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-06 20:39:31,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:31,370 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:31,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:31,371 INFO L85 PathProgramCache]: Analyzing trace with hash 178233153, now seen corresponding path program 45 times [2022-04-06 20:39:31,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:31,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1928386249] [2022-04-06 20:39:31,371 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:31,371 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:31,371 INFO L85 PathProgramCache]: Analyzing trace with hash 178233153, now seen corresponding path program 46 times [2022-04-06 20:39:31,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:31,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512327206] [2022-04-06 20:39:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:31,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:31,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:39:31,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512327206] [2022-04-06 20:39:31,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512327206] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:31,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770222166] [2022-04-06 20:39:31,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:31,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:31,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:31,608 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:31,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:39:31,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:31,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:31,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:39:31,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-04-06 20:39:31,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-04-06 20:39:31,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770222166] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:31,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:31,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11, 11] total 32 [2022-04-06 20:39:31,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:31,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1928386249] [2022-04-06 20:39:31,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1928386249] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:31,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:31,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:39:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643313294] [2022-04-06 20:39:31,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:31,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:39:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:39:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=923, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:39:31,935 INFO L87 Difference]: Start difference. First operand 522 states and 671 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:34,400 INFO L93 Difference]: Finished difference Result 754 states and 959 transitions. [2022-04-06 20:39:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:39:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 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 45 [2022-04-06 20:39:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:34,402 INFO L225 Difference]: With dead ends: 754 [2022-04-06 20:39:34,402 INFO L226 Difference]: Without dead ends: 688 [2022-04-06 20:39:34,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=383, Invalid=5623, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:39:34,403 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 81 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:34,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 121 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-04-06 20:39:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 523. [2022-04-06 20:39:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 518 states have (on average 1.2837837837837838) internal successors, (665), 518 states have internal predecessors, (665), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 669 transitions. [2022-04-06 20:39:34,707 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 669 transitions. Word has length 45 [2022-04-06 20:39:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:34,707 INFO L478 AbstractCegarLoop]: Abstraction has 523 states and 669 transitions. [2022-04-06 20:39:34,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 669 transitions. [2022-04-06 20:39:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:39:34,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:34,708 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:34,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:34,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 20:39:34,929 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash 904529439, now seen corresponding path program 87 times [2022-04-06 20:39:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:34,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2005425646] [2022-04-06 20:39:34,930 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:34,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:34,930 INFO L85 PathProgramCache]: Analyzing trace with hash 904529439, now seen corresponding path program 88 times [2022-04-06 20:39:34,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:34,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596959908] [2022-04-06 20:39:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:34,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:35,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:39:35,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:35,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596959908] [2022-04-06 20:39:35,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596959908] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:35,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483784852] [2022-04-06 20:39:35,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:35,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:35,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:35,399 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:35,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:39:35,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:35,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:39:35,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:39:35,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:39:36,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483784852] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:36,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:36,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 20:39:36,645 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2005425646] [2022-04-06 20:39:36,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2005425646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:36,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:36,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:39:36,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810528020] [2022-04-06 20:39:36,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:36,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:39:36,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:36,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:39:36,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=856, Invalid=2926, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:39:36,646 INFO L87 Difference]: Start difference. First operand 523 states and 669 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:42,385 INFO L93 Difference]: Finished difference Result 1211 states and 1707 transitions. [2022-04-06 20:39:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:39:42,385 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 31 states have internal predecessors, (41), 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 45 [2022-04-06 20:39:42,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:42,387 INFO L225 Difference]: With dead ends: 1211 [2022-04-06 20:39:42,387 INFO L226 Difference]: Without dead ends: 1180 [2022-04-06 20:39:42,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1798, Invalid=6574, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:39:42,388 INFO L913 BasicCegarLoop]: 151 mSDtfsCounter, 251 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 7646 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 7830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 7646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:42,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 293 Invalid, 7830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 7646 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:39:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-04-06 20:39:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 541. [2022-04-06 20:39:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 536 states have (on average 1.289179104477612) internal successors, (691), 536 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 695 transitions. [2022-04-06 20:39:42,698 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 695 transitions. Word has length 45 [2022-04-06 20:39:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:42,698 INFO L478 AbstractCegarLoop]: Abstraction has 541 states and 695 transitions. [2022-04-06 20:39:42,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 695 transitions. [2022-04-06 20:39:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:39:42,699 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:42,699 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:42,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 20:39:42,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:42,900 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:42,900 INFO L85 PathProgramCache]: Analyzing trace with hash 284721058, now seen corresponding path program 21 times [2022-04-06 20:39:42,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:42,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1836303019] [2022-04-06 20:39:42,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:42,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:42,901 INFO L85 PathProgramCache]: Analyzing trace with hash 284721058, now seen corresponding path program 22 times [2022-04-06 20:39:42,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:42,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381777874] [2022-04-06 20:39:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:42,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:43,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:39:43,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:43,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381777874] [2022-04-06 20:39:43,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381777874] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:43,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011604711] [2022-04-06 20:39:43,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:43,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:43,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:43,035 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:43,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:39:43,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:43,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:43,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 20:39:43,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:43,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:39:43,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011604711] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:43,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:43,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 36 [2022-04-06 20:39:43,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:43,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1836303019] [2022-04-06 20:39:43,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1836303019] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:43,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:43,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:39:43,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144627404] [2022-04-06 20:39:43,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:43,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:39:43,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:39:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:39:43,652 INFO L87 Difference]: Start difference. First operand 541 states and 695 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:44,266 INFO L93 Difference]: Finished difference Result 554 states and 708 transitions. [2022-04-06 20:39:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:39:44,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 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 46 [2022-04-06 20:39:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:44,267 INFO L225 Difference]: With dead ends: 554 [2022-04-06 20:39:44,267 INFO L226 Difference]: Without dead ends: 542 [2022-04-06 20:39:44,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1770, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:39:44,268 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:44,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:39:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-04-06 20:39:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2022-04-06 20:39:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 537 states have (on average 1.2886405959031657) internal successors, (692), 537 states have internal predecessors, (692), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 696 transitions. [2022-04-06 20:39:44,570 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 696 transitions. Word has length 46 [2022-04-06 20:39:44,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:44,570 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 696 transitions. [2022-04-06 20:39:44,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 696 transitions. [2022-04-06 20:39:44,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:39:44,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:44,571 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:44,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 20:39:44,772 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:44,772 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:44,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1423292557, now seen corresponding path program 47 times [2022-04-06 20:39:44,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:44,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136190065] [2022-04-06 20:39:44,773 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:44,773 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1423292557, now seen corresponding path program 48 times [2022-04-06 20:39:44,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:44,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406982158] [2022-04-06 20:39:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:44,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:45,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:39:45,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:45,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406982158] [2022-04-06 20:39:45,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406982158] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:45,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732603195] [2022-04-06 20:39:45,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:45,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:45,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:45,035 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:45,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:39:45,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:39:45,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:39:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:39:45,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:39:46,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732603195] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:46,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:46,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 22] total 54 [2022-04-06 20:39:46,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136190065] [2022-04-06 20:39:46,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136190065] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:46,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:46,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:39:46,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856241409] [2022-04-06 20:39:46,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:46,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:39:46,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:46,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:39:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:39:46,255 INFO L87 Difference]: Start difference. First operand 542 states and 696 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:49,088 INFO L93 Difference]: Finished difference Result 727 states and 936 transitions. [2022-04-06 20:39:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:39:49,088 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 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 46 [2022-04-06 20:39:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:49,089 INFO L225 Difference]: With dead ends: 727 [2022-04-06 20:39:49,089 INFO L226 Difference]: Without dead ends: 707 [2022-04-06 20:39:49,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1098, Invalid=9822, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:39:49,090 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 75 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:49,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 136 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:39:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-04-06 20:39:49,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 543. [2022-04-06 20:39:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.288104089219331) internal successors, (693), 538 states have internal predecessors, (693), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 697 transitions. [2022-04-06 20:39:49,391 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 697 transitions. Word has length 46 [2022-04-06 20:39:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:49,391 INFO L478 AbstractCegarLoop]: Abstraction has 543 states and 697 transitions. [2022-04-06 20:39:49,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 697 transitions. [2022-04-06 20:39:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:39:49,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:49,392 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:49,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:49,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-04-06 20:39:49,593 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1355774284, now seen corresponding path program 89 times [2022-04-06 20:39:49,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:49,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742622552] [2022-04-06 20:39:49,594 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:49,594 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1355774284, now seen corresponding path program 90 times [2022-04-06 20:39:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:49,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345901666] [2022-04-06 20:39:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:49,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 20:39:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:49,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345901666] [2022-04-06 20:39:49,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345901666] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:49,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311595088] [2022-04-06 20:39:49,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:49,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:49,779 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:49,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:39:50,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:39:50,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:39:50,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 20:39:50,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-04-06 20:39:50,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311595088] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:50,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:50,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:39:50,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:50,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742622552] [2022-04-06 20:39:50,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742622552] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:50,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:50,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:39:50,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836174758] [2022-04-06 20:39:50,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:50,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:39:50,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:39:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:39:50,898 INFO L87 Difference]: Start difference. First operand 543 states and 697 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:53,241 INFO L93 Difference]: Finished difference Result 803 states and 1015 transitions. [2022-04-06 20:39:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:39:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 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 46 [2022-04-06 20:39:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:53,243 INFO L225 Difference]: With dead ends: 803 [2022-04-06 20:39:53,243 INFO L226 Difference]: Without dead ends: 780 [2022-04-06 20:39:53,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=3361, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:39:53,244 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 93 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:53,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 137 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-04-06 20:39:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 543. [2022-04-06 20:39:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.2862453531598512) internal successors, (692), 538 states have internal predecessors, (692), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 696 transitions. [2022-04-06 20:39:53,571 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 696 transitions. Word has length 46 [2022-04-06 20:39:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:53,571 INFO L478 AbstractCegarLoop]: Abstraction has 543 states and 696 transitions. [2022-04-06 20:39:53,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 696 transitions. [2022-04-06 20:39:53,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:39:53,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:53,572 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:53,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:53,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:53,773 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:53,773 INFO L85 PathProgramCache]: Analyzing trace with hash 455029666, now seen corresponding path program 91 times [2022-04-06 20:39:53,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:53,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95633454] [2022-04-06 20:39:53,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:53,774 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash 455029666, now seen corresponding path program 92 times [2022-04-06 20:39:53,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:53,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152941988] [2022-04-06 20:39:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:53,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:53,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:39:53,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:53,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152941988] [2022-04-06 20:39:53,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152941988] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:53,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847714894] [2022-04-06 20:39:53,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:53,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:53,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:53,987 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:53,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:39:54,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:54,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:54,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:39:54,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:39:54,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:39:55,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847714894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:55,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:55,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 28] total 56 [2022-04-06 20:39:55,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:55,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95633454] [2022-04-06 20:39:55,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95633454] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:55,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:55,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:39:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006715400] [2022-04-06 20:39:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:55,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:39:55,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:39:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:39:55,136 INFO L87 Difference]: Start difference. First operand 543 states and 696 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:57,661 INFO L93 Difference]: Finished difference Result 842 states and 1059 transitions. [2022-04-06 20:39:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:39:57,661 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 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 46 [2022-04-06 20:39:57,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:57,662 INFO L225 Difference]: With dead ends: 842 [2022-04-06 20:39:57,662 INFO L226 Difference]: Without dead ends: 819 [2022-04-06 20:39:57,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=966, Invalid=5196, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:39:57,663 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 104 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:57,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 144 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-04-06 20:39:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 543. [2022-04-06 20:39:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.2843866171003717) internal successors, (691), 538 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 695 transitions. [2022-04-06 20:39:57,975 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 695 transitions. Word has length 46 [2022-04-06 20:39:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:57,975 INFO L478 AbstractCegarLoop]: Abstraction has 543 states and 695 transitions. [2022-04-06 20:39:57,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 695 transitions. [2022-04-06 20:39:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:39:57,976 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:57,976 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:57,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 20:39:58,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:58,176 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash -179293964, now seen corresponding path program 93 times [2022-04-06 20:39:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:58,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1126951449] [2022-04-06 20:39:58,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:58,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:58,177 INFO L85 PathProgramCache]: Analyzing trace with hash -179293964, now seen corresponding path program 94 times [2022-04-06 20:39:58,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:58,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715758823] [2022-04-06 20:39:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:58,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:58,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 20:39:58,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715758823] [2022-04-06 20:39:58,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715758823] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604269860] [2022-04-06 20:39:58,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:58,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:58,368 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:58,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:39:58,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:58,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:58,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:39:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 20:39:58,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 20:39:58,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604269860] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:58,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:58,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:39:58,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:58,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1126951449] [2022-04-06 20:39:58,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1126951449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:58,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:58,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:39:58,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076130393] [2022-04-06 20:39:58,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:58,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:39:58,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:58,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:39:58,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1125, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:39:58,951 INFO L87 Difference]: Start difference. First operand 543 states and 695 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:01,497 INFO L93 Difference]: Finished difference Result 882 states and 1104 transitions. [2022-04-06 20:40:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:40:01,498 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 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 46 [2022-04-06 20:40:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:01,499 INFO L225 Difference]: With dead ends: 882 [2022-04-06 20:40:01,499 INFO L226 Difference]: Without dead ends: 859 [2022-04-06 20:40:01,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=2632, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:40:01,500 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 118 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:01,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 151 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2015 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:01,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-04-06 20:40:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 543. [2022-04-06 20:40:01,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.2825278810408922) internal successors, (690), 538 states have internal predecessors, (690), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 694 transitions. [2022-04-06 20:40:01,816 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 694 transitions. Word has length 46 [2022-04-06 20:40:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:01,817 INFO L478 AbstractCegarLoop]: Abstraction has 543 states and 694 transitions. [2022-04-06 20:40:01,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 694 transitions. [2022-04-06 20:40:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:40:01,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:01,818 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:01,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:02,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 20:40:02,031 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:02,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1754622002, now seen corresponding path program 95 times [2022-04-06 20:40:02,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:02,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [145851510] [2022-04-06 20:40:02,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:02,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1754622002, now seen corresponding path program 96 times [2022-04-06 20:40:02,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:02,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272709269] [2022-04-06 20:40:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:02,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:02,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:40:02,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:02,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272709269] [2022-04-06 20:40:02,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272709269] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:02,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518961493] [2022-04-06 20:40:02,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:02,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:02,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:02,486 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:02,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:40:02,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:02,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:40:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-04-06 20:40:02,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-04-06 20:40:02,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518961493] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:02,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:02,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 8, 8] total 42 [2022-04-06 20:40:02,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:02,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [145851510] [2022-04-06 20:40:02,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [145851510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:02,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:02,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:40:02,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784016033] [2022-04-06 20:40:02,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:02,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:40:02,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:02,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:40:02,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1627, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:40:02,907 INFO L87 Difference]: Start difference. First operand 543 states and 694 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 32 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:09,674 INFO L93 Difference]: Finished difference Result 1254 states and 1767 transitions. [2022-04-06 20:40:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:40:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 32 states have internal predecessors, (42), 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 46 [2022-04-06 20:40:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:09,677 INFO L225 Difference]: With dead ends: 1254 [2022-04-06 20:40:09,677 INFO L226 Difference]: Without dead ends: 1223 [2022-04-06 20:40:09,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=238, Invalid=5018, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:40:09,678 INFO L913 BasicCegarLoop]: 157 mSDtfsCounter, 262 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 8522 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 8711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 8522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:09,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 309 Invalid, 8711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 8522 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:40:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-04-06 20:40:10,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 561. [2022-04-06 20:40:10,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 556 states have (on average 1.2877697841726619) internal successors, (716), 556 states have internal predecessors, (716), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 720 transitions. [2022-04-06 20:40:10,115 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 720 transitions. Word has length 46 [2022-04-06 20:40:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:10,116 INFO L478 AbstractCegarLoop]: Abstraction has 561 states and 720 transitions. [2022-04-06 20:40:10,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 32 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 720 transitions. [2022-04-06 20:40:10,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:10,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:10,117 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:10,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-06 20:40:10,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:10,317 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:10,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1993968048, now seen corresponding path program 23 times [2022-04-06 20:40:10,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:10,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909995174] [2022-04-06 20:40:10,319 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:10,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1993968048, now seen corresponding path program 24 times [2022-04-06 20:40:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:10,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107357405] [2022-04-06 20:40:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:10,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:10,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-04-06 20:40:10,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107357405] [2022-04-06 20:40:10,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107357405] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167225783] [2022-04-06 20:40:10,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:10,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:10,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:10,438 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:10,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:40:10,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:40:10,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:10,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:40:10,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-04-06 20:40:10,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-04-06 20:40:10,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167225783] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:10,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:10,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-04-06 20:40:10,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:10,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909995174] [2022-04-06 20:40:10,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909995174] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:10,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:10,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:40:10,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940437185] [2022-04-06 20:40:10,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:10,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:40:10,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:40:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:40:10,748 INFO L87 Difference]: Start difference. First operand 561 states and 720 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 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) [2022-04-06 20:40:11,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:11,465 INFO L93 Difference]: Finished difference Result 582 states and 743 transitions. [2022-04-06 20:40:11,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:40:11,465 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 47 [2022-04-06 20:40:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:11,467 INFO L225 Difference]: With dead ends: 582 [2022-04-06 20:40:11,467 INFO L226 Difference]: Without dead ends: 545 [2022-04-06 20:40:11,467 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:40:11,467 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 35 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:11,467 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 71 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:40:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-04-06 20:40:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 539. [2022-04-06 20:40:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 1.2958801498127341) internal successors, (692), 534 states have internal predecessors, (692), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 696 transitions. [2022-04-06 20:40:11,860 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 696 transitions. Word has length 47 [2022-04-06 20:40:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:11,860 INFO L478 AbstractCegarLoop]: Abstraction has 539 states and 696 transitions. [2022-04-06 20:40:11,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 696 transitions. [2022-04-06 20:40:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:11,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:11,861 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:11,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 20:40:12,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:12,062 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash 469017985, now seen corresponding path program 49 times [2022-04-06 20:40:12,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [438875725] [2022-04-06 20:40:12,063 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:12,063 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash 469017985, now seen corresponding path program 50 times [2022-04-06 20:40:12,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:12,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522937106] [2022-04-06 20:40:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:12,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:12,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:12,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522937106] [2022-04-06 20:40:12,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522937106] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:12,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025845573] [2022-04-06 20:40:12,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:12,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:12,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:12,428 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:12,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:40:12,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:12,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:12,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:40:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:12,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:12,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025845573] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:12,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:12,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 37 [2022-04-06 20:40:12,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:12,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [438875725] [2022-04-06 20:40:12,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [438875725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:12,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:12,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:40:12,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873860585] [2022-04-06 20:40:12,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:12,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:40:12,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:40:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:40:12,903 INFO L87 Difference]: Start difference. First operand 539 states and 696 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:18,932 INFO L93 Difference]: Finished difference Result 773 states and 1047 transitions. [2022-04-06 20:40:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-04-06 20:40:18,932 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 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 47 [2022-04-06 20:40:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:18,933 INFO L225 Difference]: With dead ends: 773 [2022-04-06 20:40:18,933 INFO L226 Difference]: Without dead ends: 752 [2022-04-06 20:40:18,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9453 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1004, Invalid=29796, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 20:40:18,935 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 149 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6283 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 6623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 6283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:18,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 174 Invalid, 6623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 6283 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:40:18,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-04-06 20:40:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 552. [2022-04-06 20:40:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.2888482632541134) internal successors, (705), 547 states have internal predecessors, (705), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 709 transitions. [2022-04-06 20:40:19,262 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 709 transitions. Word has length 47 [2022-04-06 20:40:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:19,262 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 709 transitions. [2022-04-06 20:40:19,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 709 transitions. [2022-04-06 20:40:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:19,263 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:19,263 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:19,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:19,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:19,479 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:19,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1884189135, now seen corresponding path program 51 times [2022-04-06 20:40:19,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [284243092] [2022-04-06 20:40:19,480 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:19,480 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:19,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1884189135, now seen corresponding path program 52 times [2022-04-06 20:40:19,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:19,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412297135] [2022-04-06 20:40:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:19,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:19,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:40:19,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:19,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412297135] [2022-04-06 20:40:19,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412297135] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:19,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380332640] [2022-04-06 20:40:19,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:19,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:19,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:19,756 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:19,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:40:19,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:19,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:40:19,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 32 proven. 64 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-04-06 20:40:20,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 32 proven. 64 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-04-06 20:40:20,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380332640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:20,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:20,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11, 11] total 33 [2022-04-06 20:40:20,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:20,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [284243092] [2022-04-06 20:40:20,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [284243092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:20,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:20,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:40:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129671573] [2022-04-06 20:40:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:20,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:40:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:20,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:40:20,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=985, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:40:20,117 INFO L87 Difference]: Start difference. First operand 552 states and 709 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:23,315 INFO L93 Difference]: Finished difference Result 818 states and 1043 transitions. [2022-04-06 20:40:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:40:23,316 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 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 47 [2022-04-06 20:40:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:23,317 INFO L225 Difference]: With dead ends: 818 [2022-04-06 20:40:23,317 INFO L226 Difference]: Without dead ends: 747 [2022-04-06 20:40:23,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=389, Invalid=5931, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:40:23,318 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 84 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:23,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 149 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:40:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-04-06 20:40:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 553. [2022-04-06 20:40:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 548 states have (on average 1.282846715328467) internal successors, (703), 548 states have internal predecessors, (703), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 707 transitions. [2022-04-06 20:40:23,690 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 707 transitions. Word has length 47 [2022-04-06 20:40:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:23,690 INFO L478 AbstractCegarLoop]: Abstraction has 553 states and 707 transitions. [2022-04-06 20:40:23,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 707 transitions. [2022-04-06 20:40:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:23,691 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:23,691 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:23,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 20:40:23,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-04-06 20:40:23,892 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1957279617, now seen corresponding path program 97 times [2022-04-06 20:40:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:23,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [155184092] [2022-04-06 20:40:23,893 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:23,893 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:23,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1957279617, now seen corresponding path program 98 times [2022-04-06 20:40:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:23,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185090249] [2022-04-06 20:40:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:23,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:24,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:40:24,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:24,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185090249] [2022-04-06 20:40:24,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185090249] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:24,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963517894] [2022-04-06 20:40:24,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:24,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:24,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:24,388 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:24,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:40:24,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:24,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:24,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:40:24,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:40:24,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:40:25,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963517894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:25,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:25,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:40:25,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:25,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [155184092] [2022-04-06 20:40:25,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [155184092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:25,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:25,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:40:25,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345414357] [2022-04-06 20:40:25,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:25,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:40:25,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:40:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=3314, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:40:25,816 INFO L87 Difference]: Start difference. First operand 553 states and 707 transitions. Second operand has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 33 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:33,045 INFO L93 Difference]: Finished difference Result 1319 states and 1855 transitions. [2022-04-06 20:40:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:40:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 33 states have internal predecessors, (43), 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 47 [2022-04-06 20:40:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:33,047 INFO L225 Difference]: With dead ends: 1319 [2022-04-06 20:40:33,047 INFO L226 Difference]: Without dead ends: 1287 [2022-04-06 20:40:33,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2044, Invalid=7462, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:40:33,047 INFO L913 BasicCegarLoop]: 162 mSDtfsCounter, 261 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 8792 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 8983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 8792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:33,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 314 Invalid, 8983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 8792 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:40:33,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-04-06 20:40:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 571. [2022-04-06 20:40:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 566 states have (on average 1.2879858657243817) internal successors, (729), 566 states have internal predecessors, (729), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:33,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 733 transitions. [2022-04-06 20:40:33,387 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 733 transitions. Word has length 47 [2022-04-06 20:40:33,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:33,387 INFO L478 AbstractCegarLoop]: Abstraction has 571 states and 733 transitions. [2022-04-06 20:40:33,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 33 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:33,387 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 733 transitions. [2022-04-06 20:40:33,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:40:33,388 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:33,388 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:33,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-06 20:40:33,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:33,590 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:33,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:33,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1122323842, now seen corresponding path program 53 times [2022-04-06 20:40:33,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:33,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [709580819] [2022-04-06 20:40:33,591 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:33,591 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:33,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1122323842, now seen corresponding path program 54 times [2022-04-06 20:40:33,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:33,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955066299] [2022-04-06 20:40:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:33,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:33,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:40:33,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:33,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955066299] [2022-04-06 20:40:33,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955066299] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:33,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188115614] [2022-04-06 20:40:33,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:33,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:33,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:33,791 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:33,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:40:33,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:40:33,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:40:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:40:34,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:40:34,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188115614] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:34,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:34,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 36 [2022-04-06 20:40:34,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:34,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [709580819] [2022-04-06 20:40:34,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [709580819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:34,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:34,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:40:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552807528] [2022-04-06 20:40:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:34,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:40:34,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:34,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:40:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:40:34,381 INFO L87 Difference]: Start difference. First operand 571 states and 733 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:35,582 INFO L93 Difference]: Finished difference Result 675 states and 895 transitions. [2022-04-06 20:40:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:40:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 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 48 [2022-04-06 20:40:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:35,584 INFO L225 Difference]: With dead ends: 675 [2022-04-06 20:40:35,584 INFO L226 Difference]: Without dead ends: 659 [2022-04-06 20:40:35,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=594, Invalid=2058, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:40:35,584 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 101 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:35,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 56 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:40:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-04-06 20:40:35,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 629. [2022-04-06 20:40:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 624 states have (on average 1.2916666666666667) internal successors, (806), 624 states have internal predecessors, (806), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 810 transitions. [2022-04-06 20:40:36,000 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 810 transitions. Word has length 48 [2022-04-06 20:40:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:36,000 INFO L478 AbstractCegarLoop]: Abstraction has 629 states and 810 transitions. [2022-04-06 20:40:36,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 810 transitions. [2022-04-06 20:40:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:40:36,001 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:36,001 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:36,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:36,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:36,205 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash -206366493, now seen corresponding path program 55 times [2022-04-06 20:40:36,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:36,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [22360169] [2022-04-06 20:40:36,206 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:36,206 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:36,206 INFO L85 PathProgramCache]: Analyzing trace with hash -206366493, now seen corresponding path program 56 times [2022-04-06 20:40:36,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:36,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746347640] [2022-04-06 20:40:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:36,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:36,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:40:36,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:36,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746347640] [2022-04-06 20:40:36,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746347640] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:36,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6562698] [2022-04-06 20:40:36,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:36,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:36,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:36,467 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:36,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:40:36,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:36,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:40:36,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 27 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 20:40:36,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 27 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 20:40:36,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6562698] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:36,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:36,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 12] total 35 [2022-04-06 20:40:36,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:36,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [22360169] [2022-04-06 20:40:36,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [22360169] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:36,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:36,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:40:36,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283542124] [2022-04-06 20:40:36,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:36,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:40:36,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:40:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:40:36,852 INFO L87 Difference]: Start difference. First operand 629 states and 810 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:40,342 INFO L93 Difference]: Finished difference Result 837 states and 1078 transitions. [2022-04-06 20:40:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:40:40,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 48 [2022-04-06 20:40:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:40,344 INFO L225 Difference]: With dead ends: 837 [2022-04-06 20:40:40,344 INFO L226 Difference]: Without dead ends: 816 [2022-04-06 20:40:40,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=434, Invalid=7048, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:40:40,344 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 83 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:40,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 134 Invalid, 2439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:40:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-04-06 20:40:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 630. [2022-04-06 20:40:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 625 states have (on average 1.2912) internal successors, (807), 625 states have internal predecessors, (807), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 811 transitions. [2022-04-06 20:40:40,765 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 811 transitions. Word has length 48 [2022-04-06 20:40:40,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:40,765 INFO L478 AbstractCegarLoop]: Abstraction has 630 states and 811 transitions. [2022-04-06 20:40:40,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 811 transitions. [2022-04-06 20:40:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:40:40,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:40,766 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:40,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-04-06 20:40:40,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:40,967 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:40,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:40,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1101889794, now seen corresponding path program 99 times [2022-04-06 20:40:40,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:40,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [709922277] [2022-04-06 20:40:40,968 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:40,968 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:40,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1101889794, now seen corresponding path program 100 times [2022-04-06 20:40:40,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:40,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557663677] [2022-04-06 20:40:40,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:40,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:41,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:40:41,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:41,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557663677] [2022-04-06 20:40:41,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557663677] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:41,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346884601] [2022-04-06 20:40:41,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:41,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:41,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:41,171 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:41,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:40:41,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:41,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:41,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:40:41,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:40:41,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:40:41,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346884601] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:41,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:41,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:40:41,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:41,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [709922277] [2022-04-06 20:40:41,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [709922277] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:41,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:41,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:40:41,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465747793] [2022-04-06 20:40:41,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:41,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:40:41,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:41,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:40:41,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:40:41,761 INFO L87 Difference]: Start difference. First operand 630 states and 811 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:44,825 INFO L93 Difference]: Finished difference Result 939 states and 1183 transitions. [2022-04-06 20:40:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:40:44,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 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 48 [2022-04-06 20:40:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:44,826 INFO L225 Difference]: With dead ends: 939 [2022-04-06 20:40:44,826 INFO L226 Difference]: Without dead ends: 915 [2022-04-06 20:40:44,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=872, Invalid=3684, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:40:44,827 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 95 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:44,827 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 140 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-04-06 20:40:45,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 630. [2022-04-06 20:40:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 625 states have (on average 1.2896) internal successors, (806), 625 states have internal predecessors, (806), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 810 transitions. [2022-04-06 20:40:45,252 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 810 transitions. Word has length 48 [2022-04-06 20:40:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:45,252 INFO L478 AbstractCegarLoop]: Abstraction has 630 states and 810 transitions. [2022-04-06 20:40:45,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 810 transitions. [2022-04-06 20:40:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:40:45,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:45,253 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:45,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:45,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:45,453 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:45,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1780686382, now seen corresponding path program 101 times [2022-04-06 20:40:45,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:45,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499930228] [2022-04-06 20:40:45,455 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:45,455 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1780686382, now seen corresponding path program 102 times [2022-04-06 20:40:45,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:45,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278500766] [2022-04-06 20:40:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:45,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:45,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:40:45,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:45,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278500766] [2022-04-06 20:40:45,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278500766] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:45,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720379493] [2022-04-06 20:40:45,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:45,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:45,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:45,660 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:45,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:40:46,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:40:46,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:46,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:40:46,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:40:46,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:40:46,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720379493] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:46,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:46,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:40:46,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:46,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499930228] [2022-04-06 20:40:46,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499930228] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:46,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:46,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:40:46,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585751319] [2022-04-06 20:40:46,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:46,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:40:46,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:40:46,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:40:46,932 INFO L87 Difference]: Start difference. First operand 630 states and 810 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:50,199 INFO L93 Difference]: Finished difference Result 981 states and 1230 transitions. [2022-04-06 20:40:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:40:50,200 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 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 48 [2022-04-06 20:40:50,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:50,201 INFO L225 Difference]: With dead ends: 981 [2022-04-06 20:40:50,201 INFO L226 Difference]: Without dead ends: 957 [2022-04-06 20:40:50,202 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=793, Invalid=3239, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:40:50,202 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 104 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:50,202 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 157 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:40:50,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-04-06 20:40:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 630. [2022-04-06 20:40:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 625 states have (on average 1.288) internal successors, (805), 625 states have internal predecessors, (805), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 809 transitions. [2022-04-06 20:40:50,630 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 809 transitions. Word has length 48 [2022-04-06 20:40:50,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:50,630 INFO L478 AbstractCegarLoop]: Abstraction has 630 states and 809 transitions. [2022-04-06 20:40:50,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:50,630 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 809 transitions. [2022-04-06 20:40:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:40:50,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:50,631 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:50,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:50,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-06 20:40:50,833 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:50,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1596578046, now seen corresponding path program 103 times [2022-04-06 20:40:50,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:50,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1394847659] [2022-04-06 20:40:50,834 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:50,834 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:50,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1596578046, now seen corresponding path program 104 times [2022-04-06 20:40:50,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:50,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617316298] [2022-04-06 20:40:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:50,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:51,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:40:51,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:51,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617316298] [2022-04-06 20:40:51,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617316298] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:51,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435855033] [2022-04-06 20:40:51,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:51,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:51,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:51,046 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:51,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:40:51,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:51,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:51,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:40:51,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:51,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:52,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435855033] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:52,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:52,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 32, 32] total 64 [2022-04-06 20:40:52,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:52,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1394847659] [2022-04-06 20:40:52,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1394847659] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:52,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:52,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:40:52,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687021307] [2022-04-06 20:40:52,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:52,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:40:52,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:52,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:40:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:40:52,348 INFO L87 Difference]: Start difference. First operand 630 states and 809 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:56,141 INFO L93 Difference]: Finished difference Result 1024 states and 1278 transitions. [2022-04-06 20:40:56,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:40:56,141 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 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 48 [2022-04-06 20:40:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:56,143 INFO L225 Difference]: With dead ends: 1024 [2022-04-06 20:40:56,143 INFO L226 Difference]: Without dead ends: 1000 [2022-04-06 20:40:56,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1056, Invalid=6084, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:40:56,143 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 117 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:56,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 159 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:40:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-04-06 20:40:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 630. [2022-04-06 20:40:56,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 625 states have (on average 1.2864) internal successors, (804), 625 states have internal predecessors, (804), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 808 transitions. [2022-04-06 20:40:56,572 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 808 transitions. Word has length 48 [2022-04-06 20:40:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:56,572 INFO L478 AbstractCegarLoop]: Abstraction has 630 states and 808 transitions. [2022-04-06 20:40:56,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 808 transitions. [2022-04-06 20:40:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:40:56,573 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:56,573 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:56,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:56,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 20:40:56,789 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:56,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:56,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1062112814, now seen corresponding path program 105 times [2022-04-06 20:40:56,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:56,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089585070] [2022-04-06 20:40:56,790 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:56,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1062112814, now seen corresponding path program 106 times [2022-04-06 20:40:56,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:56,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323801124] [2022-04-06 20:40:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:56,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:57,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 436 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:40:57,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:57,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323801124] [2022-04-06 20:40:57,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323801124] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:57,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869159190] [2022-04-06 20:40:57,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:57,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:57,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:57,302 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:57,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:40:57,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:57,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:57,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:40:57,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 436 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:40:57,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 436 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:40:58,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869159190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:58,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:58,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 20:40:58,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:58,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089585070] [2022-04-06 20:40:58,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089585070] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:58,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:58,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:40:58,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117222062] [2022-04-06 20:40:58,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:58,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:40:58,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:58,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:40:58,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=3517, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:40:58,762 INFO L87 Difference]: Start difference. First operand 630 states and 808 transitions. Second operand has 35 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 34 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:06,811 INFO L93 Difference]: Finished difference Result 1454 states and 2050 transitions. [2022-04-06 20:41:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:41:06,811 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 34 states have internal predecessors, (44), 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 48 [2022-04-06 20:41:06,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:06,813 INFO L225 Difference]: With dead ends: 1454 [2022-04-06 20:41:06,813 INFO L226 Difference]: Without dead ends: 1420 [2022-04-06 20:41:06,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2173, Invalid=7927, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:41:06,814 INFO L913 BasicCegarLoop]: 168 mSDtfsCounter, 272 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 9425 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 9624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 9425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:06,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 325 Invalid, 9624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 9425 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 20:41:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2022-04-06 20:41:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 650. [2022-04-06 20:41:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 645 states have (on average 1.2914728682170542) internal successors, (833), 645 states have internal predecessors, (833), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 837 transitions. [2022-04-06 20:41:07,264 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 837 transitions. Word has length 48 [2022-04-06 20:41:07,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:07,264 INFO L478 AbstractCegarLoop]: Abstraction has 650 states and 837 transitions. [2022-04-06 20:41:07,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 34 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:07,264 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 837 transitions. [2022-04-06 20:41:07,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:41:07,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:07,265 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:07,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:07,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-06 20:41:07,465 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash -589081521, now seen corresponding path program 57 times [2022-04-06 20:41:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:07,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [642881000] [2022-04-06 20:41:07,466 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:07,466 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:07,467 INFO L85 PathProgramCache]: Analyzing trace with hash -589081521, now seen corresponding path program 58 times [2022-04-06 20:41:07,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:07,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087199741] [2022-04-06 20:41:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:07,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:07,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:41:07,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:07,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087199741] [2022-04-06 20:41:07,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087199741] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:07,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026789217] [2022-04-06 20:41:07,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:07,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:07,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:07,776 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:07,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:41:07,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:07,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:07,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:41:07,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 20 proven. 100 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-04-06 20:41:08,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 20 proven. 100 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-04-06 20:41:08,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026789217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:08,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:08,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 37 [2022-04-06 20:41:08,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:08,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [642881000] [2022-04-06 20:41:08,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [642881000] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:08,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:08,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:41:08,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232886045] [2022-04-06 20:41:08,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:08,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:41:08,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:08,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:41:08,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:41:08,204 INFO L87 Difference]: Start difference. First operand 650 states and 837 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:12,098 INFO L93 Difference]: Finished difference Result 858 states and 1105 transitions. [2022-04-06 20:41:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:41:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 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 49 [2022-04-06 20:41:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:12,100 INFO L225 Difference]: With dead ends: 858 [2022-04-06 20:41:12,100 INFO L226 Difference]: Without dead ends: 837 [2022-04-06 20:41:12,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=479, Invalid=8263, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:41:12,101 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 79 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:12,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 159 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2927 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:41:12,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-04-06 20:41:12,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 651. [2022-04-06 20:41:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 646 states have (on average 1.2910216718266254) internal successors, (834), 646 states have internal predecessors, (834), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 838 transitions. [2022-04-06 20:41:12,578 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 838 transitions. Word has length 49 [2022-04-06 20:41:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:12,578 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 838 transitions. [2022-04-06 20:41:12,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 838 transitions. [2022-04-06 20:41:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:41:12,579 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:12,579 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:12,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:12,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:12,779 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:12,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:12,780 INFO L85 PathProgramCache]: Analyzing trace with hash 918254303, now seen corresponding path program 107 times [2022-04-06 20:41:12,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:12,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1364144644] [2022-04-06 20:41:12,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:12,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:12,781 INFO L85 PathProgramCache]: Analyzing trace with hash 918254303, now seen corresponding path program 108 times [2022-04-06 20:41:12,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:12,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116993760] [2022-04-06 20:41:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:12,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:13,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:41:13,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116993760] [2022-04-06 20:41:13,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116993760] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:13,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634333000] [2022-04-06 20:41:13,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:13,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:13,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:13,296 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:13,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:41:13,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:41:13,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:13,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:41:13,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-04-06 20:41:13,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-04-06 20:41:13,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634333000] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:13,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:13,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 8, 8] total 45 [2022-04-06 20:41:13,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:13,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1364144644] [2022-04-06 20:41:13,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1364144644] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:13,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:13,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:41:13,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630332188] [2022-04-06 20:41:13,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:13,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:41:13,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:13,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:41:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1879, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:41:13,758 INFO L87 Difference]: Start difference. First operand 651 states and 838 transitions. Second operand has 36 states, 36 states have (on average 1.25) internal successors, (45), 35 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:22,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:22,477 INFO L93 Difference]: Finished difference Result 1501 states and 2120 transitions. [2022-04-06 20:41:22,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:41:22,477 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.25) internal successors, (45), 35 states have internal predecessors, (45), 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 49 [2022-04-06 20:41:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:22,479 INFO L225 Difference]: With dead ends: 1501 [2022-04-06 20:41:22,479 INFO L226 Difference]: Without dead ends: 1467 [2022-04-06 20:41:22,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=256, Invalid=5906, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:41:22,479 INFO L913 BasicCegarLoop]: 174 mSDtfsCounter, 283 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 10396 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 10602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 10396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:22,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 341 Invalid, 10602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 10396 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 20:41:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-04-06 20:41:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 671. [2022-04-06 20:41:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 666 states have (on average 1.2957957957957957) internal successors, (863), 666 states have internal predecessors, (863), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 867 transitions. [2022-04-06 20:41:22,944 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 867 transitions. Word has length 49 [2022-04-06 20:41:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:22,944 INFO L478 AbstractCegarLoop]: Abstraction has 671 states and 867 transitions. [2022-04-06 20:41:22,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.25) internal successors, (45), 35 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 867 transitions. [2022-04-06 20:41:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:41:22,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:22,945 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:22,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:23,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 20:41:23,145 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:23,145 INFO L85 PathProgramCache]: Analyzing trace with hash 431654499, now seen corresponding path program 59 times [2022-04-06 20:41:23,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:23,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [464062829] [2022-04-06 20:41:23,146 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:23,146 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash 431654499, now seen corresponding path program 60 times [2022-04-06 20:41:23,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:23,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545476515] [2022-04-06 20:41:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:23,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:23,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:23,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:23,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545476515] [2022-04-06 20:41:23,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545476515] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:23,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824892273] [2022-04-06 20:41:23,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:23,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:23,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:23,495 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:23,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:41:23,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:41:23,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:23,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:41:23,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:23,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:24,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824892273] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:24,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:24,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 52 [2022-04-06 20:41:24,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:24,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [464062829] [2022-04-06 20:41:24,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [464062829] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:24,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:24,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:41:24,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356256899] [2022-04-06 20:41:24,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:24,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:41:24,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:24,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:41:24,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:41:24,691 INFO L87 Difference]: Start difference. First operand 671 states and 867 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:32,223 INFO L93 Difference]: Finished difference Result 951 states and 1285 transitions. [2022-04-06 20:41:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-04-06 20:41:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 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 50 [2022-04-06 20:41:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:32,225 INFO L225 Difference]: With dead ends: 951 [2022-04-06 20:41:32,225 INFO L226 Difference]: Without dead ends: 929 [2022-04-06 20:41:32,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13704 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=42155, Unknown=0, NotChecked=0, Total=47306 [2022-04-06 20:41:32,227 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 197 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 8163 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 8634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 8163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:32,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 188 Invalid, 8634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 8163 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:41:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-04-06 20:41:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 685. [2022-04-06 20:41:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 680 states have (on average 1.2897058823529413) internal successors, (877), 680 states have internal predecessors, (877), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 881 transitions. [2022-04-06 20:41:32,726 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 881 transitions. Word has length 50 [2022-04-06 20:41:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:32,726 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 881 transitions. [2022-04-06 20:41:32,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,727 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 881 transitions. [2022-04-06 20:41:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:41:32,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:32,728 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:32,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-06 20:41:32,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 20:41:32,928 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash 134925090, now seen corresponding path program 109 times [2022-04-06 20:41:32,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:32,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2024190809] [2022-04-06 20:41:32,929 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:32,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:32,929 INFO L85 PathProgramCache]: Analyzing trace with hash 134925090, now seen corresponding path program 110 times [2022-04-06 20:41:32,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:32,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712554822] [2022-04-06 20:41:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:32,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:33,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 20:41:33,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:33,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712554822] [2022-04-06 20:41:33,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712554822] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99152853] [2022-04-06 20:41:33,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:33,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:33,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:33,158 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:33,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:41:33,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:33,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:33,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:41:33,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:41:33,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:41:34,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99152853] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:34,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:34,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 28] total 56 [2022-04-06 20:41:34,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:34,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2024190809] [2022-04-06 20:41:34,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2024190809] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:34,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:34,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:41:34,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379763612] [2022-04-06 20:41:34,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:34,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:41:34,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:34,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:41:34,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:41:34,218 INFO L87 Difference]: Start difference. First operand 685 states and 881 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:38,073 INFO L93 Difference]: Finished difference Result 1002 states and 1274 transitions. [2022-04-06 20:41:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:41:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 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 50 [2022-04-06 20:41:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:38,075 INFO L225 Difference]: With dead ends: 1002 [2022-04-06 20:41:38,075 INFO L226 Difference]: Without dead ends: 977 [2022-04-06 20:41:38,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1312, Invalid=6698, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:41:38,076 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 96 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:38,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 144 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:41:38,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-04-06 20:41:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 685. [2022-04-06 20:41:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 680 states have (on average 1.2882352941176471) internal successors, (876), 680 states have internal predecessors, (876), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 880 transitions. [2022-04-06 20:41:38,594 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 880 transitions. Word has length 50 [2022-04-06 20:41:38,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:38,595 INFO L478 AbstractCegarLoop]: Abstraction has 685 states and 880 transitions. [2022-04-06 20:41:38,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 880 transitions. [2022-04-06 20:41:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:41:38,595 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:38,595 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:38,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-06 20:41:38,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:38,796 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash -769692493, now seen corresponding path program 61 times [2022-04-06 20:41:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:38,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1848656362] [2022-04-06 20:41:38,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:38,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:38,797 INFO L85 PathProgramCache]: Analyzing trace with hash -769692493, now seen corresponding path program 62 times [2022-04-06 20:41:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:38,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632474276] [2022-04-06 20:41:38,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:38,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:39,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:41:39,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:39,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632474276] [2022-04-06 20:41:39,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632474276] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:39,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000945879] [2022-04-06 20:41:39,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:39,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:39,114 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:39,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:41:39,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:39,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:39,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:41:39,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 20:41:39,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 20:41:39,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000945879] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:39,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:39,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 12] total 36 [2022-04-06 20:41:39,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:39,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1848656362] [2022-04-06 20:41:39,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1848656362] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:39,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:39,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:41:39,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774046248] [2022-04-06 20:41:39,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:39,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:41:39,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:39,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:41:39,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1182, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:41:39,539 INFO L87 Difference]: Start difference. First operand 685 states and 880 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:44,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:44,112 INFO L93 Difference]: Finished difference Result 993 states and 1267 transitions. [2022-04-06 20:41:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:41:44,113 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 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 50 [2022-04-06 20:41:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:44,114 INFO L225 Difference]: With dead ends: 993 [2022-04-06 20:41:44,114 INFO L226 Difference]: Without dead ends: 917 [2022-04-06 20:41:44,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=478, Invalid=8264, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:41:44,115 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 94 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3213 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 3213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:44,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 169 Invalid, 3391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 3213 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:41:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-04-06 20:41:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 686. [2022-04-06 20:41:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 681 states have (on average 1.2834067547723935) internal successors, (874), 681 states have internal predecessors, (874), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 878 transitions. [2022-04-06 20:41:44,624 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 878 transitions. Word has length 50 [2022-04-06 20:41:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:44,624 INFO L478 AbstractCegarLoop]: Abstraction has 686 states and 878 transitions. [2022-04-06 20:41:44,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 878 transitions. [2022-04-06 20:41:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:41:44,625 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:44,625 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:44,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-04-06 20:41:44,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:44,826 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:44,826 INFO L85 PathProgramCache]: Analyzing trace with hash 346736564, now seen corresponding path program 111 times [2022-04-06 20:41:44,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:44,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [120478116] [2022-04-06 20:41:44,827 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:44,827 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash 346736564, now seen corresponding path program 112 times [2022-04-06 20:41:44,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:44,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229158849] [2022-04-06 20:41:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:44,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:45,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-04-06 20:41:45,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229158849] [2022-04-06 20:41:45,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229158849] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488801347] [2022-04-06 20:41:45,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:45,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:45,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:45,048 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:45,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:41:45,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:45,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:41:45,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-04-06 20:41:45,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-04-06 20:41:45,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488801347] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:45,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:45,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:41:45,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:45,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [120478116] [2022-04-06 20:41:45,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [120478116] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:45,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:45,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:41:45,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053896588] [2022-04-06 20:41:45,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:45,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:41:45,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:41:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:41:45,693 INFO L87 Difference]: Start difference. First operand 686 states and 878 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:49,533 INFO L93 Difference]: Finished difference Result 1047 states and 1322 transitions. [2022-04-06 20:41:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:41:49,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 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 50 [2022-04-06 20:41:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:49,535 INFO L225 Difference]: With dead ends: 1047 [2022-04-06 20:41:49,535 INFO L226 Difference]: Without dead ends: 1022 [2022-04-06 20:41:49,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=4021, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:41:49,535 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 107 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:49,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 146 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-04-06 20:41:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 686. [2022-04-06 20:41:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 681 states have (on average 1.2819383259911894) internal successors, (873), 681 states have internal predecessors, (873), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 877 transitions. [2022-04-06 20:41:50,052 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 877 transitions. Word has length 50 [2022-04-06 20:41:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:50,052 INFO L478 AbstractCegarLoop]: Abstraction has 686 states and 877 transitions. [2022-04-06 20:41:50,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 877 transitions. [2022-04-06 20:41:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:41:50,053 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:50,053 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:50,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-06 20:41:50,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-04-06 20:41:50,254 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:50,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2001735454, now seen corresponding path program 113 times [2022-04-06 20:41:50,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:50,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [772572476] [2022-04-06 20:41:50,255 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:50,255 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2001735454, now seen corresponding path program 114 times [2022-04-06 20:41:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:50,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805808202] [2022-04-06 20:41:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:50,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 20:41:50,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:50,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805808202] [2022-04-06 20:41:50,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805808202] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:50,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347059903] [2022-04-06 20:41:50,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:50,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:50,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:50,474 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:50,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 20:41:51,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:41:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:41:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 20:41:51,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 20:41:51,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347059903] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:51,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:51,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:41:51,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:51,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [772572476] [2022-04-06 20:41:51,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [772572476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:51,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:51,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:41:51,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247687246] [2022-04-06 20:41:51,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:51,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:41:51,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:51,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:41:51,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1396, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:41:51,680 INFO L87 Difference]: Start difference. First operand 686 states and 877 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:56,056 INFO L93 Difference]: Finished difference Result 1092 states and 1373 transitions. [2022-04-06 20:41:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:41:56,057 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 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 50 [2022-04-06 20:41:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:56,058 INFO L225 Difference]: With dead ends: 1092 [2022-04-06 20:41:56,058 INFO L226 Difference]: Without dead ends: 1067 [2022-04-06 20:41:56,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=869, Invalid=3553, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:41:56,059 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 116 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:56,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 168 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:41:56,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-04-06 20:41:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 686. [2022-04-06 20:41:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 681 states have (on average 1.2804698972099853) internal successors, (872), 681 states have internal predecessors, (872), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 876 transitions. [2022-04-06 20:41:56,548 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 876 transitions. Word has length 50 [2022-04-06 20:41:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:56,549 INFO L478 AbstractCegarLoop]: Abstraction has 686 states and 876 transitions. [2022-04-06 20:41:56,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 876 transitions. [2022-04-06 20:41:56,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:41:56,549 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:56,549 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:56,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-04-06 20:41:56,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:56,751 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:56,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2078927348, now seen corresponding path program 115 times [2022-04-06 20:41:56,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:56,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306640580] [2022-04-06 20:41:56,752 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:56,752 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:56,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2078927348, now seen corresponding path program 116 times [2022-04-06 20:41:56,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:56,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568695394] [2022-04-06 20:41:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:56,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:56,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-04-06 20:41:56,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:56,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568695394] [2022-04-06 20:41:56,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568695394] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:56,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981762482] [2022-04-06 20:41:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:56,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:56,979 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:56,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 20:41:57,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:57,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:57,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:41:57,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:57,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:58,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981762482] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:58,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:58,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 34, 34] total 68 [2022-04-06 20:41:58,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:58,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306640580] [2022-04-06 20:41:58,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306640580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:58,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:58,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:41:58,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091794852] [2022-04-06 20:41:58,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:58,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:41:58,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:41:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:41:58,434 INFO L87 Difference]: Start difference. First operand 686 states and 876 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:03,002 INFO L93 Difference]: Finished difference Result 1138 states and 1425 transitions. [2022-04-06 20:42:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:42:03,002 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 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 50 [2022-04-06 20:42:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:03,003 INFO L225 Difference]: With dead ends: 1138 [2022-04-06 20:42:03,003 INFO L226 Difference]: Without dead ends: 1113 [2022-04-06 20:42:03,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=6839, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:42:03,004 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 130 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2737 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:03,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 175 Invalid, 2840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2737 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:42:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-04-06 20:42:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 686. [2022-04-06 20:42:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 681 states have (on average 1.2790014684287812) internal successors, (871), 681 states have internal predecessors, (871), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:03,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 875 transitions. [2022-04-06 20:42:03,503 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 875 transitions. Word has length 50 [2022-04-06 20:42:03,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:03,504 INFO L478 AbstractCegarLoop]: Abstraction has 686 states and 875 transitions. [2022-04-06 20:42:03,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:03,504 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 875 transitions. [2022-04-06 20:42:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:42:03,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:03,504 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:03,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 20:42:03,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:03,705 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2114874510, now seen corresponding path program 117 times [2022-04-06 20:42:03,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:03,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796415214] [2022-04-06 20:42:03,706 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:03,706 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2114874510, now seen corresponding path program 118 times [2022-04-06 20:42:03,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:03,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206770778] [2022-04-06 20:42:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:03,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:04,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:42:04,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206770778] [2022-04-06 20:42:04,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206770778] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152030564] [2022-04-06 20:42:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:04,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:04,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:04,233 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:04,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 20:42:04,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:04,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:04,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:42:04,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:42:04,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:42:05,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152030564] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:05,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:05,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:42:05,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:05,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796415214] [2022-04-06 20:42:05,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796415214] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:05,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:05,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:42:05,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558202032] [2022-04-06 20:42:05,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:05,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:42:05,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:42:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1171, Invalid=3941, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:42:05,854 INFO L87 Difference]: Start difference. First operand 686 states and 875 transitions. Second operand has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 36 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:17,247 INFO L93 Difference]: Finished difference Result 1626 states and 2293 transitions. [2022-04-06 20:42:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:42:17,247 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 36 states have internal predecessors, (46), 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 50 [2022-04-06 20:42:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:17,249 INFO L225 Difference]: With dead ends: 1626 [2022-04-06 20:42:17,250 INFO L226 Difference]: Without dead ends: 1592 [2022-04-06 20:42:17,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2443, Invalid=8899, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:42:17,251 INFO L913 BasicCegarLoop]: 178 mSDtfsCounter, 295 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 10692 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 10906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 10692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:17,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 345 Invalid, 10906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 10692 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:42:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-04-06 20:42:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 706. [2022-04-06 20:42:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 701 states have (on average 1.2838801711840229) internal successors, (900), 701 states have internal predecessors, (900), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 904 transitions. [2022-04-06 20:42:17,930 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 904 transitions. Word has length 50 [2022-04-06 20:42:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:17,930 INFO L478 AbstractCegarLoop]: Abstraction has 706 states and 904 transitions. [2022-04-06 20:42:17,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 36 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 904 transitions. [2022-04-06 20:42:17,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:17,931 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:17,931 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:17,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-06 20:42:18,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-04-06 20:42:18,132 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:18,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1540323473, now seen corresponding path program 25 times [2022-04-06 20:42:18,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [643724515] [2022-04-06 20:42:18,133 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:18,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1540323473, now seen corresponding path program 26 times [2022-04-06 20:42:18,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:18,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755177188] [2022-04-06 20:42:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:18,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:18,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:42:18,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:18,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755177188] [2022-04-06 20:42:18,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755177188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:18,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787610529] [2022-04-06 20:42:18,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:18,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:18,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:18,285 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:18,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 20:42:18,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:18,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:18,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 20:42:18,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:18,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:42:18,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787610529] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:18,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:18,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 40 [2022-04-06 20:42:18,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:18,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [643724515] [2022-04-06 20:42:18,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [643724515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:18,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:18,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:42:18,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636905845] [2022-04-06 20:42:18,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:18,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:42:18,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:42:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:42:18,995 INFO L87 Difference]: Start difference. First operand 706 states and 904 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:19,931 INFO L93 Difference]: Finished difference Result 720 states and 918 transitions. [2022-04-06 20:42:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:42:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 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 51 [2022-04-06 20:42:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:19,932 INFO L225 Difference]: With dead ends: 720 [2022-04-06 20:42:19,932 INFO L226 Difference]: Without dead ends: 707 [2022-04-06 20:42:19,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:42:19,932 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:19,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 73 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:42:19,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-04-06 20:42:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 707. [2022-04-06 20:42:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 702 states have (on average 1.2834757834757835) internal successors, (901), 702 states have internal predecessors, (901), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 905 transitions. [2022-04-06 20:42:20,463 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 905 transitions. Word has length 51 [2022-04-06 20:42:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:20,463 INFO L478 AbstractCegarLoop]: Abstraction has 707 states and 905 transitions. [2022-04-06 20:42:20,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 905 transitions. [2022-04-06 20:42:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:20,464 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:20,464 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:20,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-04-06 20:42:20,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:20,665 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:20,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:20,665 INFO L85 PathProgramCache]: Analyzing trace with hash -548507647, now seen corresponding path program 63 times [2022-04-06 20:42:20,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:20,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1559847228] [2022-04-06 20:42:20,666 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:20,666 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:20,666 INFO L85 PathProgramCache]: Analyzing trace with hash -548507647, now seen corresponding path program 64 times [2022-04-06 20:42:20,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:20,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799767639] [2022-04-06 20:42:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:20,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:20,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:42:20,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:20,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799767639] [2022-04-06 20:42:20,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799767639] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:20,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619467562] [2022-04-06 20:42:20,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:20,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:20,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:20,978 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:20,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 20:42:21,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:21,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:21,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:42:21,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 30 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-04-06 20:42:21,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 30 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-04-06 20:42:21,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619467562] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:21,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:21,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13, 13] total 38 [2022-04-06 20:42:21,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:21,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1559847228] [2022-04-06 20:42:21,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1559847228] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:21,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:21,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:42:21,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012128210] [2022-04-06 20:42:21,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:21,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:42:21,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:21,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:42:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1323, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:42:21,408 INFO L87 Difference]: Start difference. First operand 707 states and 905 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:26,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:26,492 INFO L93 Difference]: Finished difference Result 960 states and 1236 transitions. [2022-04-06 20:42:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:42:26,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 26 states have internal predecessors, (36), 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 51 [2022-04-06 20:42:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:26,493 INFO L225 Difference]: With dead ends: 960 [2022-04-06 20:42:26,493 INFO L226 Difference]: Without dead ends: 938 [2022-04-06 20:42:26,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=531, Invalid=9771, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:42:26,494 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 94 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3499 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 3499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:26,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 174 Invalid, 3691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 3499 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:42:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-04-06 20:42:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 708. [2022-04-06 20:42:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 703 states have (on average 1.2830725462304409) internal successors, (902), 703 states have internal predecessors, (902), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 906 transitions. [2022-04-06 20:42:27,009 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 906 transitions. Word has length 51 [2022-04-06 20:42:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:27,009 INFO L478 AbstractCegarLoop]: Abstraction has 708 states and 906 transitions. [2022-04-06 20:42:27,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 906 transitions. [2022-04-06 20:42:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:27,010 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:27,010 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:27,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-04-06 20:42:27,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-06 20:42:27,212 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:27,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1652587201, now seen corresponding path program 119 times [2022-04-06 20:42:27,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:27,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2093863986] [2022-04-06 20:42:27,213 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:27,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:27,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1652587201, now seen corresponding path program 120 times [2022-04-06 20:42:27,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:27,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078121938] [2022-04-06 20:42:27,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:27,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:27,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:42:27,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:27,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078121938] [2022-04-06 20:42:27,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078121938] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:27,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387929310] [2022-04-06 20:42:27,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:27,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:27,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:27,799 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:27,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 20:42:27,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:42:27,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:27,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:42:27,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 20:42:28,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 20:42:28,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387929310] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:28,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:28,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 8, 8] total 47 [2022-04-06 20:42:28,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:28,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2093863986] [2022-04-06 20:42:28,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2093863986] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:28,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:28,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:42:28,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700673175] [2022-04-06 20:42:28,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:28,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:42:28,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:42:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2057, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:42:28,261 INFO L87 Difference]: Start difference. First operand 708 states and 906 transitions. Second operand has 38 states, 38 states have (on average 1.236842105263158) internal successors, (47), 37 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:39,278 INFO L93 Difference]: Finished difference Result 1675 states and 2365 transitions. [2022-04-06 20:42:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:42:39,278 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.236842105263158) internal successors, (47), 37 states have internal predecessors, (47), 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 51 [2022-04-06 20:42:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:39,280 INFO L225 Difference]: With dead ends: 1675 [2022-04-06 20:42:39,280 INFO L226 Difference]: Without dead ends: 1641 [2022-04-06 20:42:39,281 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=268, Invalid=6538, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:42:39,281 INFO L913 BasicCegarLoop]: 184 mSDtfsCounter, 306 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 11389 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 11609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 11389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:39,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 356 Invalid, 11609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 11389 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 20:42:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2022-04-06 20:42:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 728. [2022-04-06 20:42:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 723 states have (on average 1.2876901798063625) internal successors, (931), 723 states have internal predecessors, (931), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:39,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 935 transitions. [2022-04-06 20:42:39,833 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 935 transitions. Word has length 51 [2022-04-06 20:42:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:39,833 INFO L478 AbstractCegarLoop]: Abstraction has 728 states and 935 transitions. [2022-04-06 20:42:39,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.236842105263158) internal successors, (47), 37 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 935 transitions. [2022-04-06 20:42:39,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:39,834 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:39,834 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:39,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:40,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:40,034 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash -951962941, now seen corresponding path program 27 times [2022-04-06 20:42:40,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:40,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421753671] [2022-04-06 20:42:40,036 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:40,036 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -951962941, now seen corresponding path program 28 times [2022-04-06 20:42:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797233110] [2022-04-06 20:42:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:40,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:40,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:42:40,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:40,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797233110] [2022-04-06 20:42:40,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797233110] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:40,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730398323] [2022-04-06 20:42:40,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:40,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:40,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:40,145 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:40,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 20:42:40,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:40,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:40,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:42:40,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:42:40,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:42:40,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730398323] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:40,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:40,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-04-06 20:42:40,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:40,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421753671] [2022-04-06 20:42:40,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421753671] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:40,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:40,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:42:40,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657710177] [2022-04-06 20:42:40,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:40,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:42:40,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:42:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:42:40,331 INFO L87 Difference]: Start difference. First operand 728 states and 935 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:41,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:41,169 INFO L93 Difference]: Finished difference Result 751 states and 960 transitions. [2022-04-06 20:42:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:42:41,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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 52 [2022-04-06 20:42:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:41,170 INFO L225 Difference]: With dead ends: 751 [2022-04-06 20:42:41,170 INFO L226 Difference]: Without dead ends: 710 [2022-04-06 20:42:41,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:42:41,170 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 38 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:41,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 79 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:42:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-04-06 20:42:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 703. [2022-04-06 20:42:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 698 states have (on average 1.2951289398280803) internal successors, (904), 698 states have internal predecessors, (904), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 908 transitions. [2022-04-06 20:42:41,663 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 908 transitions. Word has length 52 [2022-04-06 20:42:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:41,664 INFO L478 AbstractCegarLoop]: Abstraction has 703 states and 908 transitions. [2022-04-06 20:42:41,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 908 transitions. [2022-04-06 20:42:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:41,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:41,664 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:41,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-04-06 20:42:41,865 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-06 20:42:41,865 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1644607011, now seen corresponding path program 65 times [2022-04-06 20:42:41,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:41,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1199680196] [2022-04-06 20:42:41,866 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:41,866 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:41,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1644607011, now seen corresponding path program 66 times [2022-04-06 20:42:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:41,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563724195] [2022-04-06 20:42:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:42,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:42:42,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:42,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563724195] [2022-04-06 20:42:42,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563724195] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:42,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141586397] [2022-04-06 20:42:42,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:42,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:42,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:42,097 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:42,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 20:42:42,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:42:42,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:42,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:42:42,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:42:42,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:42:42,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141586397] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:42,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:42,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 30 [2022-04-06 20:42:42,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:42,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1199680196] [2022-04-06 20:42:42,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1199680196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:42,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:42,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:42:42,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813848895] [2022-04-06 20:42:42,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:42,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:42:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:42,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:42:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:42:42,628 INFO L87 Difference]: Start difference. First operand 703 states and 908 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:44,128 INFO L93 Difference]: Finished difference Result 820 states and 1091 transitions. [2022-04-06 20:42:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:42:44,128 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 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 52 [2022-04-06 20:42:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:44,129 INFO L225 Difference]: With dead ends: 820 [2022-04-06 20:42:44,129 INFO L226 Difference]: Without dead ends: 803 [2022-04-06 20:42:44,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=491, Invalid=1765, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:42:44,130 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:44,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 54 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:42:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-04-06 20:42:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 769. [2022-04-06 20:42:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 764 states have (on average 1.2984293193717278) internal successors, (992), 764 states have internal predecessors, (992), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 996 transitions. [2022-04-06 20:42:44,750 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 996 transitions. Word has length 52 [2022-04-06 20:42:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:44,750 INFO L478 AbstractCegarLoop]: Abstraction has 769 states and 996 transitions. [2022-04-06 20:42:44,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 996 transitions. [2022-04-06 20:42:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:44,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:44,751 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:44,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-04-06 20:42:44,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 20:42:44,951 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:44,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2013255283, now seen corresponding path program 67 times [2022-04-06 20:42:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:44,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [603670818] [2022-04-06 20:42:44,952 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:44,952 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2013255283, now seen corresponding path program 68 times [2022-04-06 20:42:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:44,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930757179] [2022-04-06 20:42:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:44,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:45,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:42:45,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:45,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930757179] [2022-04-06 20:42:45,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930757179] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:45,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324714912] [2022-04-06 20:42:45,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:45,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:45,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:45,280 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:45,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 20:42:45,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:45,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:45,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:42:45,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 22 proven. 121 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-04-06 20:42:45,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 22 proven. 121 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-04-06 20:42:45,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324714912] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:45,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:45,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14, 14] total 40 [2022-04-06 20:42:45,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:45,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [603670818] [2022-04-06 20:42:45,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [603670818] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:45,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:45,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:42:45,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134174221] [2022-04-06 20:42:45,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:45,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:42:45,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:42:45,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1472, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:42:45,778 INFO L87 Difference]: Start difference. First operand 769 states and 996 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:50,460 INFO L93 Difference]: Finished difference Result 1000 states and 1291 transitions. [2022-04-06 20:42:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:42:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 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 52 [2022-04-06 20:42:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:50,461 INFO L225 Difference]: With dead ends: 1000 [2022-04-06 20:42:50,461 INFO L226 Difference]: Without dead ends: 978 [2022-04-06 20:42:50,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=530, Invalid=9976, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:42:50,462 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 82 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2628 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:50,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 132 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2628 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:42:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-04-06 20:42:51,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 770. [2022-04-06 20:42:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 765 states have (on average 1.2980392156862746) internal successors, (993), 765 states have internal predecessors, (993), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:51,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 997 transitions. [2022-04-06 20:42:51,101 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 997 transitions. Word has length 52 [2022-04-06 20:42:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:51,101 INFO L478 AbstractCegarLoop]: Abstraction has 770 states and 997 transitions. [2022-04-06 20:42:51,101 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 997 transitions. [2022-04-06 20:42:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:51,102 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:51,102 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:51,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:51,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-04-06 20:42:51,302 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash 506157330, now seen corresponding path program 121 times [2022-04-06 20:42:51,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:51,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [532365912] [2022-04-06 20:42:51,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:51,304 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:51,304 INFO L85 PathProgramCache]: Analyzing trace with hash 506157330, now seen corresponding path program 122 times [2022-04-06 20:42:51,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:51,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324764395] [2022-04-06 20:42:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:51,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:51,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:42:51,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:51,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324764395] [2022-04-06 20:42:51,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324764395] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:51,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715573807] [2022-04-06 20:42:51,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:51,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:51,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:51,539 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:51,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 20:42:51,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:51,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:51,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:42:51,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:42:51,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 197 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:42:52,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715573807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:52,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:52,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 30, 30] total 60 [2022-04-06 20:42:52,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:52,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [532365912] [2022-04-06 20:42:52,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [532365912] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:52,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:52,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:42:52,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46535079] [2022-04-06 20:42:52,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:52,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:42:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:42:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=3016, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:42:52,730 INFO L87 Difference]: Start difference. First operand 770 states and 997 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:57,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:57,328 INFO L93 Difference]: Finished difference Result 1112 states and 1406 transitions. [2022-04-06 20:42:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:42:57,329 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 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 52 [2022-04-06 20:42:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:57,330 INFO L225 Difference]: With dead ends: 1112 [2022-04-06 20:42:57,330 INFO L226 Difference]: Without dead ends: 1086 [2022-04-06 20:42:57,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1442, Invalid=7488, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:42:57,330 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 97 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2226 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:57,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 147 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:42:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-04-06 20:42:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 770. [2022-04-06 20:42:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 765 states have (on average 1.296732026143791) internal successors, (992), 765 states have internal predecessors, (992), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 996 transitions. [2022-04-06 20:42:57,977 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 996 transitions. Word has length 52 [2022-04-06 20:42:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:57,978 INFO L478 AbstractCegarLoop]: Abstraction has 770 states and 996 transitions. [2022-04-06 20:42:57,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 996 transitions. [2022-04-06 20:42:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:57,978 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:57,978 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:57,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:58,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-04-06 20:42:58,179 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:58,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1404010878, now seen corresponding path program 123 times [2022-04-06 20:42:58,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:58,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1048421381] [2022-04-06 20:42:58,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:58,180 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:58,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1404010878, now seen corresponding path program 124 times [2022-04-06 20:42:58,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:58,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198637842] [2022-04-06 20:42:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:58,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:58,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:42:58,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198637842] [2022-04-06 20:42:58,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198637842] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:58,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262270400] [2022-04-06 20:42:58,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:58,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:58,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:58,427 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:58,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 20:42:58,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:58,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:58,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:42:58,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:42:58,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:42:59,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262270400] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:59,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:59,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:42:59,115 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:59,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1048421381] [2022-04-06 20:42:59,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1048421381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:59,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:59,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:42:59,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652581178] [2022-04-06 20:42:59,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:59,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:42:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:42:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:42:59,116 INFO L87 Difference]: Start difference. First operand 770 states and 996 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:03,618 INFO L93 Difference]: Finished difference Result 1157 states and 1456 transitions. [2022-04-06 20:43:03,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:43:03,619 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 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 52 [2022-04-06 20:43:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:03,620 INFO L225 Difference]: With dead ends: 1157 [2022-04-06 20:43:03,620 INFO L226 Difference]: Without dead ends: 1131 [2022-04-06 20:43:03,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1030, Invalid=4372, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:43:03,620 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 107 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:03,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 159 Invalid, 2561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2447 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:43:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-04-06 20:43:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 770. [2022-04-06 20:43:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 765 states have (on average 1.2954248366013073) internal successors, (991), 765 states have internal predecessors, (991), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 995 transitions. [2022-04-06 20:43:04,268 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 995 transitions. Word has length 52 [2022-04-06 20:43:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:04,268 INFO L478 AbstractCegarLoop]: Abstraction has 770 states and 995 transitions. [2022-04-06 20:43:04,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 995 transitions. [2022-04-06 20:43:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:43:04,269 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:04,269 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:04,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:04,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:04,469 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:04,470 INFO L85 PathProgramCache]: Analyzing trace with hash -80155886, now seen corresponding path program 125 times [2022-04-06 20:43:04,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:04,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1224437837] [2022-04-06 20:43:04,471 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:04,471 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash -80155886, now seen corresponding path program 126 times [2022-04-06 20:43:04,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:04,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706461263] [2022-04-06 20:43:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:04,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:04,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:43:04,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706461263] [2022-04-06 20:43:04,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706461263] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439824439] [2022-04-06 20:43:04,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:04,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:04,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:04,707 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:04,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 20:43:05,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:43:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:05,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:43:05,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:43:05,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:43:06,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439824439] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:06,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:06,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:43:06,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:06,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1224437837] [2022-04-06 20:43:06,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1224437837] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:06,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:06,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:43:06,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316854171] [2022-04-06 20:43:06,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:06,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:43:06,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:06,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:43:06,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:43:06,149 INFO L87 Difference]: Start difference. First operand 770 states and 995 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:11,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:11,182 INFO L93 Difference]: Finished difference Result 1203 states and 1507 transitions. [2022-04-06 20:43:11,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:43:11,182 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 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 52 [2022-04-06 20:43:11,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:11,183 INFO L225 Difference]: With dead ends: 1203 [2022-04-06 20:43:11,183 INFO L226 Difference]: Without dead ends: 1177 [2022-04-06 20:43:11,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=3881, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:43:11,184 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 116 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2999 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:11,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 181 Invalid, 3103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2999 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:43:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-04-06 20:43:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 770. [2022-04-06 20:43:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 765 states have (on average 1.2941176470588236) internal successors, (990), 765 states have internal predecessors, (990), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 994 transitions. [2022-04-06 20:43:11,810 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 994 transitions. Word has length 52 [2022-04-06 20:43:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:11,810 INFO L478 AbstractCegarLoop]: Abstraction has 770 states and 994 transitions. [2022-04-06 20:43:11,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 994 transitions. [2022-04-06 20:43:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:43:11,811 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:11,811 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:11,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-04-06 20:43:12,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:12,011 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:12,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:12,012 INFO L85 PathProgramCache]: Analyzing trace with hash 239643778, now seen corresponding path program 127 times [2022-04-06 20:43:12,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:12,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1244219217] [2022-04-06 20:43:12,012 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:12,012 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:12,013 INFO L85 PathProgramCache]: Analyzing trace with hash 239643778, now seen corresponding path program 128 times [2022-04-06 20:43:12,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:12,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662917329] [2022-04-06 20:43:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:12,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:12,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 20:43:12,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:12,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662917329] [2022-04-06 20:43:12,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662917329] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:12,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946657045] [2022-04-06 20:43:12,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:12,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:12,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:12,254 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:12,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 20:43:12,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:12,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:12,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:43:12,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:43:12,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:43:13,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946657045] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:13,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:13,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 36, 36] total 72 [2022-04-06 20:43:13,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:13,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1244219217] [2022-04-06 20:43:13,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1244219217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:13,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:13,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:43:13,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510668896] [2022-04-06 20:43:13,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:13,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:43:13,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:13,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:43:13,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=4375, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:43:13,873 INFO L87 Difference]: Start difference. First operand 770 states and 994 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:19,102 INFO L93 Difference]: Finished difference Result 1250 states and 1559 transitions. [2022-04-06 20:43:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:43:19,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 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 52 [2022-04-06 20:43:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:19,103 INFO L225 Difference]: With dead ends: 1250 [2022-04-06 20:43:19,103 INFO L226 Difference]: Without dead ends: 1224 [2022-04-06 20:43:19,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1292, Invalid=7638, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:43:19,104 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 130 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3179 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 3283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:19,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 188 Invalid, 3283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3179 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:43:19,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-04-06 20:43:19,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 770. [2022-04-06 20:43:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 765 states have (on average 1.29281045751634) internal successors, (989), 765 states have internal predecessors, (989), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 993 transitions. [2022-04-06 20:43:19,734 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 993 transitions. Word has length 52 [2022-04-06 20:43:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:19,734 INFO L478 AbstractCegarLoop]: Abstraction has 770 states and 993 transitions. [2022-04-06 20:43:19,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 993 transitions. [2022-04-06 20:43:19,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:43:19,735 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:19,735 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:19,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-04-06 20:43:19,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:19,936 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:19,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:19,937 INFO L85 PathProgramCache]: Analyzing trace with hash -206582510, now seen corresponding path program 129 times [2022-04-06 20:43:19,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:19,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925827839] [2022-04-06 20:43:19,938 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:19,938 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash -206582510, now seen corresponding path program 130 times [2022-04-06 20:43:19,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:19,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649115344] [2022-04-06 20:43:19,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:19,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:20,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:43:20,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:20,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649115344] [2022-04-06 20:43:20,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649115344] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:20,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542599020] [2022-04-06 20:43:20,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:20,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:20,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:20,540 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:20,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 20:43:20,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:20,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:20,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:43:20,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:43:20,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:43:22,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542599020] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:22,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:22,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:43:22,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:22,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925827839] [2022-04-06 20:43:22,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925827839] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:22,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:22,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:43:22,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024001786] [2022-04-06 20:43:22,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:22,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:43:22,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:22,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:43:22,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1311, Invalid=4389, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:43:22,296 INFO L87 Difference]: Start difference. First operand 770 states and 993 transitions. Second operand has 39 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 38 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:33,969 INFO L93 Difference]: Finished difference Result 1770 states and 2500 transitions. [2022-04-06 20:43:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:43:33,970 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 38 states have internal predecessors, (48), 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 52 [2022-04-06 20:43:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:33,971 INFO L225 Difference]: With dead ends: 1770 [2022-04-06 20:43:33,971 INFO L226 Difference]: Without dead ends: 1733 [2022-04-06 20:43:33,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2729, Invalid=9927, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:43:33,972 INFO L913 BasicCegarLoop]: 189 mSDtfsCounter, 305 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 12040 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 12263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 12040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:33,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 366 Invalid, 12263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 12040 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-06 20:43:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-04-06 20:43:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 792. [2022-04-06 20:43:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 787 states have (on average 1.2973316391359593) internal successors, (1021), 787 states have internal predecessors, (1021), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:34,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1025 transitions. [2022-04-06 20:43:34,613 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1025 transitions. Word has length 52 [2022-04-06 20:43:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:34,613 INFO L478 AbstractCegarLoop]: Abstraction has 792 states and 1025 transitions. [2022-04-06 20:43:34,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 38 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1025 transitions. [2022-04-06 20:43:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:34,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:34,614 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:34,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-04-06 20:43:34,814 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:34,815 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash -176472511, now seen corresponding path program 69 times [2022-04-06 20:43:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:34,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [705276023] [2022-04-06 20:43:34,816 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:34,816 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash -176472511, now seen corresponding path program 70 times [2022-04-06 20:43:34,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:34,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506617385] [2022-04-06 20:43:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:35,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:35,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:35,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506617385] [2022-04-06 20:43:35,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506617385] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:35,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050220013] [2022-04-06 20:43:35,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:35,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:35,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:35,217 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:35,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 20:43:35,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:35,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:35,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:43:35,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:43:35,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:43:35,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050220013] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:35,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:35,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15, 15] total 43 [2022-04-06 20:43:35,770 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [705276023] [2022-04-06 20:43:35,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [705276023] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:35,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:35,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:43:35,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422898099] [2022-04-06 20:43:35,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:35,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:43:35,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:43:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:43:35,771 INFO L87 Difference]: Start difference. First operand 792 states and 1025 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:46,123 INFO L93 Difference]: Finished difference Result 1107 states and 1495 transitions. [2022-04-06 20:43:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-04-06 20:43:46,124 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 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 53 [2022-04-06 20:43:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:46,125 INFO L225 Difference]: With dead ends: 1107 [2022-04-06 20:43:46,125 INFO L226 Difference]: Without dead ends: 1084 [2022-04-06 20:43:46,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17952 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1372, Invalid=53150, Unknown=0, NotChecked=0, Total=54522 [2022-04-06 20:43:46,127 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 202 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 9463 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 9976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 9463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:46,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 196 Invalid, 9976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 9463 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:43:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-04-06 20:43:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 807. [2022-04-06 20:43:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 802 states have (on average 1.2917705735660847) internal successors, (1036), 802 states have internal predecessors, (1036), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1040 transitions. [2022-04-06 20:43:46,828 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1040 transitions. Word has length 53 [2022-04-06 20:43:46,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:46,828 INFO L478 AbstractCegarLoop]: Abstraction has 807 states and 1040 transitions. [2022-04-06 20:43:46,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1040 transitions. [2022-04-06 20:43:46,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:46,829 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:46,829 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:46,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:47,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:47,029 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:47,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2123467599, now seen corresponding path program 71 times [2022-04-06 20:43:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:47,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [893075497] [2022-04-06 20:43:47,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:47,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:47,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2123467599, now seen corresponding path program 72 times [2022-04-06 20:43:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:47,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916160300] [2022-04-06 20:43:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:47,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:43:47,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:47,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916160300] [2022-04-06 20:43:47,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916160300] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:47,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469732404] [2022-04-06 20:43:47,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:47,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:47,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:47,363 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:47,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 20:43:47,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:43:47,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:47,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:43:47,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:43:48,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 20:43:49,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469732404] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:49,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:49,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 24] total 61 [2022-04-06 20:43:49,011 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:49,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [893075497] [2022-04-06 20:43:49,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [893075497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:49,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:49,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:43:49,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508976141] [2022-04-06 20:43:49,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:49,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:43:49,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:49,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:43:49,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=3247, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:43:49,012 INFO L87 Difference]: Start difference. First operand 807 states and 1040 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:54,861 INFO L93 Difference]: Finished difference Result 1160 states and 1477 transitions. [2022-04-06 20:43:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:43:54,862 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 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 53 [2022-04-06 20:43:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:54,863 INFO L225 Difference]: With dead ends: 1160 [2022-04-06 20:43:54,863 INFO L226 Difference]: Without dead ends: 1064 [2022-04-06 20:43:54,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1407, Invalid=14343, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 20:43:54,864 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 97 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2890 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:54,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 142 Invalid, 3088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2890 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:43:54,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-04-06 20:43:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 808. [2022-04-06 20:43:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 803 states have (on average 1.286425902864259) internal successors, (1033), 803 states have internal predecessors, (1033), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1037 transitions. [2022-04-06 20:43:55,581 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1037 transitions. Word has length 53 [2022-04-06 20:43:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:55,581 INFO L478 AbstractCegarLoop]: Abstraction has 808 states and 1037 transitions. [2022-04-06 20:43:55,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1037 transitions. [2022-04-06 20:43:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:55,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:55,582 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:55,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-04-06 20:43:55,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-04-06 20:43:55,782 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:55,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1669889951, now seen corresponding path program 131 times [2022-04-06 20:43:55,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:55,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2067695457] [2022-04-06 20:43:55,783 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:55,783 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1669889951, now seen corresponding path program 132 times [2022-04-06 20:43:55,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:55,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983228004] [2022-04-06 20:43:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:55,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:56,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:43:56,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:56,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983228004] [2022-04-06 20:43:56,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983228004] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:56,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947015589] [2022-04-06 20:43:56,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:56,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:56,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:56,393 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:56,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 20:43:56,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:43:56,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:56,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:43:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-04-06 20:43:56,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-04-06 20:43:56,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947015589] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:56,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:56,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 8, 8] total 49 [2022-04-06 20:43:56,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:56,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2067695457] [2022-04-06 20:43:56,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2067695457] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:56,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:56,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:43:56,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103766791] [2022-04-06 20:43:56,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:56,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:43:56,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:43:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2243, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:43:56,867 INFO L87 Difference]: Start difference. First operand 808 states and 1037 transitions. Second operand has 40 states, 40 states have (on average 1.225) internal successors, (49), 39 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:10,730 INFO L93 Difference]: Finished difference Result 1906 states and 2692 transitions. [2022-04-06 20:44:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:44:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.225) internal successors, (49), 39 states have internal predecessors, (49), 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 53 [2022-04-06 20:44:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:10,732 INFO L225 Difference]: With dead ends: 1906 [2022-04-06 20:44:10,732 INFO L226 Difference]: Without dead ends: 1869 [2022-04-06 20:44:10,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=280, Invalid=7202, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:44:10,733 INFO L913 BasicCegarLoop]: 195 mSDtfsCounter, 316 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 13135 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 13365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 13135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:10,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 382 Invalid, 13365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 13135 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:44:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-04-06 20:44:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 830. [2022-04-06 20:44:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 825 states have (on average 1.290909090909091) internal successors, (1065), 825 states have internal predecessors, (1065), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1069 transitions. [2022-04-06 20:44:11,432 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1069 transitions. Word has length 53 [2022-04-06 20:44:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:11,432 INFO L478 AbstractCegarLoop]: Abstraction has 830 states and 1069 transitions. [2022-04-06 20:44:11,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.225) internal successors, (49), 39 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1069 transitions. [2022-04-06 20:44:11,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:44:11,433 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:11,433 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:11,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:11,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-06 20:44:11,633 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:11,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:11,634 INFO L85 PathProgramCache]: Analyzing trace with hash 393338787, now seen corresponding path program 73 times [2022-04-06 20:44:11,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:11,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1416573767] [2022-04-06 20:44:11,634 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:11,634 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:11,634 INFO L85 PathProgramCache]: Analyzing trace with hash 393338787, now seen corresponding path program 74 times [2022-04-06 20:44:11,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:11,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166964621] [2022-04-06 20:44:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:11,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:11,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:44:11,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:11,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166964621] [2022-04-06 20:44:11,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166964621] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:11,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118540720] [2022-04-06 20:44:11,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:11,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:11,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:11,985 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:11,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 20:44:12,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:12,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:12,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:44:12,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 33 proven. 121 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 20:44:12,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 33 proven. 121 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 20:44:12,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118540720] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:12,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:12,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14, 14] total 41 [2022-04-06 20:44:12,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:12,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1416573767] [2022-04-06 20:44:12,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1416573767] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:12,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:12,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:44:12,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47037605] [2022-04-06 20:44:12,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:12,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:44:12,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:44:12,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1550, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:44:12,487 INFO L87 Difference]: Start difference. First operand 830 states and 1069 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:18,799 INFO L93 Difference]: Finished difference Result 1110 states and 1433 transitions. [2022-04-06 20:44:18,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:44:18,800 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 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 54 [2022-04-06 20:44:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:18,801 INFO L225 Difference]: With dead ends: 1110 [2022-04-06 20:44:18,801 INFO L226 Difference]: Without dead ends: 1087 [2022-04-06 20:44:18,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=590, Invalid=11842, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:44:18,802 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 96 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4245 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 4451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 4245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:18,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 192 Invalid, 4451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 4245 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:44:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-04-06 20:44:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 831. [2022-04-06 20:44:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 826 states have (on average 1.2905569007263922) internal successors, (1066), 826 states have internal predecessors, (1066), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1070 transitions. [2022-04-06 20:44:19,794 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1070 transitions. Word has length 54 [2022-04-06 20:44:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:19,794 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1070 transitions. [2022-04-06 20:44:19,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1070 transitions. [2022-04-06 20:44:19,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:44:19,795 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:19,795 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:19,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:19,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-04-06 20:44:19,996 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash 19521634, now seen corresponding path program 133 times [2022-04-06 20:44:19,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:19,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1362639059] [2022-04-06 20:44:19,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:19,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash 19521634, now seen corresponding path program 134 times [2022-04-06 20:44:19,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:19,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266715285] [2022-04-06 20:44:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:20,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:44:20,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:20,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266715285] [2022-04-06 20:44:20,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266715285] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:20,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411726053] [2022-04-06 20:44:20,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:20,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:20,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:20,309 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:20,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 20:44:20,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:20,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:20,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:44:20,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:44:20,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:44:21,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411726053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:21,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:21,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 32, 32] total 64 [2022-04-06 20:44:21,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1362639059] [2022-04-06 20:44:21,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1362639059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:21,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:21,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:44:21,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653904319] [2022-04-06 20:44:21,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:21,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:44:21,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:44:21,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:44:21,813 INFO L87 Difference]: Start difference. First operand 831 states and 1070 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:27,914 INFO L93 Difference]: Finished difference Result 1228 states and 1555 transitions. [2022-04-06 20:44:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:44:27,915 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 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 54 [2022-04-06 20:44:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:27,916 INFO L225 Difference]: With dead ends: 1228 [2022-04-06 20:44:27,916 INFO L226 Difference]: Without dead ends: 1201 [2022-04-06 20:44:27,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1578, Invalid=8322, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:44:27,916 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 109 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:27,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 168 Invalid, 2931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:44:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-04-06 20:44:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 831. [2022-04-06 20:44:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 826 states have (on average 1.2893462469733656) internal successors, (1065), 826 states have internal predecessors, (1065), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1069 transitions. [2022-04-06 20:44:28,654 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1069 transitions. Word has length 54 [2022-04-06 20:44:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:28,654 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1069 transitions. [2022-04-06 20:44:28,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1069 transitions. [2022-04-06 20:44:28,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:44:28,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:28,655 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:28,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-04-06 20:44:28,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-06 20:44:28,856 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1047460020, now seen corresponding path program 135 times [2022-04-06 20:44:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:28,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574899359] [2022-04-06 20:44:28,857 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:28,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:28,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1047460020, now seen corresponding path program 136 times [2022-04-06 20:44:28,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:28,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532151480] [2022-04-06 20:44:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:28,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:29,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:44:29,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532151480] [2022-04-06 20:44:29,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532151480] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:29,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059399855] [2022-04-06 20:44:29,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:29,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:29,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:29,111 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:29,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 20:44:29,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:29,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:29,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:44:29,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:44:29,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:44:29,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059399855] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:29,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:29,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:44:29,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:29,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574899359] [2022-04-06 20:44:29,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574899359] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:29,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:29,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:44:29,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798779850] [2022-04-06 20:44:29,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:29,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:44:29,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:29,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:44:29,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:44:29,841 INFO L87 Difference]: Start difference. First operand 831 states and 1069 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:35,547 INFO L93 Difference]: Finished difference Result 1276 states and 1609 transitions. [2022-04-06 20:44:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:44:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 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 54 [2022-04-06 20:44:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:35,549 INFO L225 Difference]: With dead ends: 1276 [2022-04-06 20:44:35,549 INFO L226 Difference]: Without dead ends: 1249 [2022-04-06 20:44:35,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1115, Invalid=4737, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:44:35,549 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 119 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:35,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 165 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2644 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:44:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-04-06 20:44:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 831. [2022-04-06 20:44:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 826 states have (on average 1.2881355932203389) internal successors, (1064), 826 states have internal predecessors, (1064), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1068 transitions. [2022-04-06 20:44:36,279 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1068 transitions. Word has length 54 [2022-04-06 20:44:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:36,279 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1068 transitions. [2022-04-06 20:44:36,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1068 transitions. [2022-04-06 20:44:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:44:36,280 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:36,280 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:36,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:36,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:36,482 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:36,482 INFO L85 PathProgramCache]: Analyzing trace with hash 249335330, now seen corresponding path program 137 times [2022-04-06 20:44:36,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:36,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390531105] [2022-04-06 20:44:36,483 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:36,483 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:36,483 INFO L85 PathProgramCache]: Analyzing trace with hash 249335330, now seen corresponding path program 138 times [2022-04-06 20:44:36,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:36,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391889338] [2022-04-06 20:44:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:36,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:36,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 20:44:36,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:36,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391889338] [2022-04-06 20:44:36,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391889338] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289998768] [2022-04-06 20:44:36,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:36,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:36,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:36,752 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:36,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 20:44:37,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:44:37,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:37,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:44:37,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 20:44:37,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 20:44:38,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289998768] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:38,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:38,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:44:38,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:38,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390531105] [2022-04-06 20:44:38,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390531105] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:38,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:38,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:44:38,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669724966] [2022-04-06 20:44:38,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:38,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:44:38,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:44:38,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:44:38,411 INFO L87 Difference]: Start difference. First operand 831 states and 1068 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:44,631 INFO L93 Difference]: Finished difference Result 1325 states and 1664 transitions. [2022-04-06 20:44:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:44:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 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 54 [2022-04-06 20:44:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:44,633 INFO L225 Difference]: With dead ends: 1325 [2022-04-06 20:44:44,633 INFO L226 Difference]: Without dead ends: 1298 [2022-04-06 20:44:44,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1033, Invalid=4223, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:44:44,634 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 128 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2916 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:44,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 177 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2916 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:44:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-04-06 20:44:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 831. [2022-04-06 20:44:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 826 states have (on average 1.2869249394673123) internal successors, (1063), 826 states have internal predecessors, (1063), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1067 transitions. [2022-04-06 20:44:45,346 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1067 transitions. Word has length 54 [2022-04-06 20:44:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:45,346 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1067 transitions. [2022-04-06 20:44:45,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1067 transitions. [2022-04-06 20:44:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:44:45,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:45,347 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:45,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-04-06 20:44:45,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:45,552 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash -53505292, now seen corresponding path program 139 times [2022-04-06 20:44:45,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:45,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [496968692] [2022-04-06 20:44:45,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:45,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:45,553 INFO L85 PathProgramCache]: Analyzing trace with hash -53505292, now seen corresponding path program 140 times [2022-04-06 20:44:45,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:45,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141428551] [2022-04-06 20:44:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:45,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:45,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:44:45,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:45,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141428551] [2022-04-06 20:44:45,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141428551] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:45,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750719683] [2022-04-06 20:44:45,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:45,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:45,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:45,830 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:45,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 20:44:45,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:45,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:45,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:44:45,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:46,341 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:44:46,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:44:47,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750719683] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:47,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:47,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 38, 38] total 76 [2022-04-06 20:44:47,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:47,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [496968692] [2022-04-06 20:44:47,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [496968692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:47,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:47,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:44:47,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663379628] [2022-04-06 20:44:47,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:47,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:44:47,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:47,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:44:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=816, Invalid=4884, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:44:47,602 INFO L87 Difference]: Start difference. First operand 831 states and 1067 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:54,432 INFO L93 Difference]: Finished difference Result 1375 states and 1720 transitions. [2022-04-06 20:44:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:44:54,433 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 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 54 [2022-04-06 20:44:54,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:54,434 INFO L225 Difference]: With dead ends: 1375 [2022-04-06 20:44:54,434 INFO L226 Difference]: Without dead ends: 1348 [2022-04-06 20:44:54,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1419, Invalid=8481, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:44:54,435 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 143 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3400 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:54,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 194 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3400 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:44:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-04-06 20:44:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 831. [2022-04-06 20:44:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 826 states have (on average 1.2857142857142858) internal successors, (1062), 826 states have internal predecessors, (1062), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1066 transitions. [2022-04-06 20:44:55,239 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1066 transitions. Word has length 54 [2022-04-06 20:44:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:55,239 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1066 transitions. [2022-04-06 20:44:55,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1066 transitions. [2022-04-06 20:44:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:44:55,240 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:55,240 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:55,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-04-06 20:44:55,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-06 20:44:55,447 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:55,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash -289005902, now seen corresponding path program 141 times [2022-04-06 20:44:55,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:55,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1556297030] [2022-04-06 20:44:55,448 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:55,448 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash -289005902, now seen corresponding path program 142 times [2022-04-06 20:44:55,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:55,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329216924] [2022-04-06 20:44:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:55,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:56,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:44:56,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329216924] [2022-04-06 20:44:56,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329216924] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:56,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957323234] [2022-04-06 20:44:56,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:56,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:56,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:56,088 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:56,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 20:44:56,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:56,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:56,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:44:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:44:56,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:44:58,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957323234] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:58,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:58,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 20:44:58,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1556297030] [2022-04-06 20:44:58,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1556297030] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:58,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:58,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:44:58,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342407205] [2022-04-06 20:44:58,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:58,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:44:58,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:58,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:44:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1459, Invalid=4861, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:44:58,060 INFO L87 Difference]: Start difference. First operand 831 states and 1066 transitions. Second operand has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:12,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:12,925 INFO L93 Difference]: Finished difference Result 1959 states and 2767 transitions. [2022-04-06 20:45:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:45:12,926 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 40 states have internal predecessors, (50), 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 54 [2022-04-06 20:45:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:12,928 INFO L225 Difference]: With dead ends: 1959 [2022-04-06 20:45:12,928 INFO L226 Difference]: Without dead ends: 1922 [2022-04-06 20:45:12,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3031, Invalid=11011, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 20:45:12,929 INFO L913 BasicCegarLoop]: 201 mSDtfsCounter, 327 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 13540 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 13777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 13540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:12,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 388 Invalid, 13777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 13540 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 20:45:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2022-04-06 20:45:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 853. [2022-04-06 20:45:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 848 states have (on average 1.2900943396226414) internal successors, (1094), 848 states have internal predecessors, (1094), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1098 transitions. [2022-04-06 20:45:13,685 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1098 transitions. Word has length 54 [2022-04-06 20:45:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:13,685 INFO L478 AbstractCegarLoop]: Abstraction has 853 states and 1098 transitions. [2022-04-06 20:45:13,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1098 transitions. [2022-04-06 20:45:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:13,686 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:13,686 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:13,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-04-06 20:45:13,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-04-06 20:45:13,887 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:13,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:13,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1701046833, now seen corresponding path program 75 times [2022-04-06 20:45:13,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:13,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [313618019] [2022-04-06 20:45:13,888 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:13,888 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:13,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1701046833, now seen corresponding path program 76 times [2022-04-06 20:45:13,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:13,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435200869] [2022-04-06 20:45:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:13,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:14,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:45:14,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:14,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435200869] [2022-04-06 20:45:14,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435200869] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:14,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993989418] [2022-04-06 20:45:14,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:14,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:14,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:14,281 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:14,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 20:45:14,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:14,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:45:14,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 24 proven. 144 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 20:45:14,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 24 proven. 144 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 20:45:14,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993989418] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:14,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:14,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15, 15] total 43 [2022-04-06 20:45:14,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [313618019] [2022-04-06 20:45:14,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [313618019] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:14,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:14,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:45:14,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669947726] [2022-04-06 20:45:14,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:14,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:45:14,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:45:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1711, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:45:14,874 INFO L87 Difference]: Start difference. First operand 853 states and 1098 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:21,239 INFO L93 Difference]: Finished difference Result 1133 states and 1462 transitions. [2022-04-06 20:45:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:45:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 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 55 [2022-04-06 20:45:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:21,241 INFO L225 Difference]: With dead ends: 1133 [2022-04-06 20:45:21,241 INFO L226 Difference]: Without dead ends: 1110 [2022-04-06 20:45:21,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=643, Invalid=13637, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:45:21,242 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3409 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 3409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:21,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 147 Invalid, 3635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 3409 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:45:21,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2022-04-06 20:45:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 854. [2022-04-06 20:45:22,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 849 states have (on average 1.2897526501766785) internal successors, (1095), 849 states have internal predecessors, (1095), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1099 transitions. [2022-04-06 20:45:22,006 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1099 transitions. Word has length 55 [2022-04-06 20:45:22,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:22,006 INFO L478 AbstractCegarLoop]: Abstraction has 854 states and 1099 transitions. [2022-04-06 20:45:22,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1099 transitions. [2022-04-06 20:45:22,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:22,007 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:22,008 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:22,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-04-06 20:45:22,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:22,211 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:22,211 INFO L85 PathProgramCache]: Analyzing trace with hash 877619841, now seen corresponding path program 77 times [2022-04-06 20:45:22,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:22,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [415525000] [2022-04-06 20:45:22,212 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:22,212 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:22,212 INFO L85 PathProgramCache]: Analyzing trace with hash 877619841, now seen corresponding path program 78 times [2022-04-06 20:45:22,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:22,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736592236] [2022-04-06 20:45:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:22,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:22,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:45:22,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:22,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736592236] [2022-04-06 20:45:22,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736592236] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:22,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443918139] [2022-04-06 20:45:22,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:22,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:22,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:22,575 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:22,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 20:45:23,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:45:23,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:23,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:45:23,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:23,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:24,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443918139] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:24,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:24,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 32] total 64 [2022-04-06 20:45:24,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:24,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [415525000] [2022-04-06 20:45:24,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [415525000] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:24,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:24,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:45:24,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049714637] [2022-04-06 20:45:24,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:24,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:45:24,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:24,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:45:24,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=3440, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:45:24,391 INFO L87 Difference]: Start difference. First operand 854 states and 1099 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:31,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:31,125 INFO L93 Difference]: Finished difference Result 1234 states and 1570 transitions. [2022-04-06 20:45:31,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:45:31,125 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 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 55 [2022-04-06 20:45:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:31,126 INFO L225 Difference]: With dead ends: 1234 [2022-04-06 20:45:31,126 INFO L226 Difference]: Without dead ends: 1133 [2022-04-06 20:45:31,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2900, Invalid=15190, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:45:31,127 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 108 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4319 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 4535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 4319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:31,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 192 Invalid, 4535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 4319 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:45:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-04-06 20:45:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 855. [2022-04-06 20:45:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 850 states have (on average 1.2847058823529411) internal successors, (1092), 850 states have internal predecessors, (1092), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1096 transitions. [2022-04-06 20:45:31,868 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1096 transitions. Word has length 55 [2022-04-06 20:45:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:31,868 INFO L478 AbstractCegarLoop]: Abstraction has 855 states and 1096 transitions. [2022-04-06 20:45:31,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1096 transitions. [2022-04-06 20:45:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:31,869 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:31,869 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:31,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-04-06 20:45:32,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:32,070 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:32,070 INFO L85 PathProgramCache]: Analyzing trace with hash -885235201, now seen corresponding path program 143 times [2022-04-06 20:45:32,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:32,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [292349921] [2022-04-06 20:45:32,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:32,071 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:32,071 INFO L85 PathProgramCache]: Analyzing trace with hash -885235201, now seen corresponding path program 144 times [2022-04-06 20:45:32,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:32,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934168236] [2022-04-06 20:45:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:32,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:32,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 667 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:45:32,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:32,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934168236] [2022-04-06 20:45:32,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934168236] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:32,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738168082] [2022-04-06 20:45:32,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:32,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:32,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:32,756 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:32,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-06 20:45:32,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:32,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:32,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:45:32,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2022-04-06 20:45:33,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2022-04-06 20:45:33,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738168082] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:33,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:33,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 8, 8] total 51 [2022-04-06 20:45:33,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:33,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [292349921] [2022-04-06 20:45:33,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [292349921] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:33,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:33,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:45:33,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693801259] [2022-04-06 20:45:33,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:33,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:45:33,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:33,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:45:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2437, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:45:33,272 INFO L87 Difference]: Start difference. First operand 855 states and 1096 transitions. Second operand has 42 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 41 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:49,096 INFO L93 Difference]: Finished difference Result 2013 states and 2843 transitions. [2022-04-06 20:45:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:45:49,096 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 41 states have internal predecessors, (51), 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 55 [2022-04-06 20:45:49,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:49,098 INFO L225 Difference]: With dead ends: 2013 [2022-04-06 20:45:49,098 INFO L226 Difference]: Without dead ends: 1976 [2022-04-06 20:45:49,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=292, Invalid=7898, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:45:49,099 INFO L913 BasicCegarLoop]: 205 mSDtfsCounter, 339 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 14248 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 14493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 14248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:49,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 397 Invalid, 14493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 14248 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 20:45:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-04-06 20:45:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 877. [2022-04-06 20:45:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 872 states have (on average 1.2889908256880733) internal successors, (1124), 872 states have internal predecessors, (1124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1128 transitions. [2022-04-06 20:45:49,840 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1128 transitions. Word has length 55 [2022-04-06 20:45:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:49,840 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 1128 transitions. [2022-04-06 20:45:49,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 41 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:49,840 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1128 transitions. [2022-04-06 20:45:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:45:49,841 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:49,841 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:49,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-04-06 20:45:50,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:50,041 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:50,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1945484158, now seen corresponding path program 29 times [2022-04-06 20:45:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:50,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1701320290] [2022-04-06 20:45:50,042 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:50,043 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1945484158, now seen corresponding path program 30 times [2022-04-06 20:45:50,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:50,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581029660] [2022-04-06 20:45:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:50,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:50,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:45:50,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:50,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581029660] [2022-04-06 20:45:50,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581029660] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:50,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739930900] [2022-04-06 20:45:50,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:50,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:50,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:50,246 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:50,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-06 20:45:50,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:45:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 120 conjunts are in the unsatisfiable core [2022-04-06 20:45:50,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:51,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:45:52,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739930900] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:52,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:52,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 44, 36] total 80 [2022-04-06 20:45:52,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:52,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1701320290] [2022-04-06 20:45:52,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1701320290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:52,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:52,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:45:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476097841] [2022-04-06 20:45:52,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:52,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:45:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:45:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=5239, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:45:52,697 INFO L87 Difference]: Start difference. First operand 877 states and 1128 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:54,193 INFO L93 Difference]: Finished difference Result 892 states and 1143 transitions. [2022-04-06 20:45:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:45:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 13 states have internal predecessors, (45), 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 56 [2022-04-06 20:45:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:54,195 INFO L225 Difference]: With dead ends: 892 [2022-04-06 20:45:54,195 INFO L226 Difference]: Without dead ends: 878 [2022-04-06 20:45:54,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2670 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1160, Invalid=7030, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:45:54,195 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:54,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 78 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:45:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-04-06 20:45:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2022-04-06 20:45:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 873 states have (on average 1.288659793814433) internal successors, (1125), 873 states have internal predecessors, (1125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1129 transitions. [2022-04-06 20:45:55,023 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1129 transitions. Word has length 56 [2022-04-06 20:45:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:55,023 INFO L478 AbstractCegarLoop]: Abstraction has 878 states and 1129 transitions. [2022-04-06 20:45:55,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1129 transitions. [2022-04-06 20:45:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:45:55,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:55,024 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:55,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:55,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-04-06 20:45:55,225 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash -588917598, now seen corresponding path program 79 times [2022-04-06 20:45:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:55,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971378076] [2022-04-06 20:45:55,226 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:55,226 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash -588917598, now seen corresponding path program 80 times [2022-04-06 20:45:55,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:55,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399449721] [2022-04-06 20:45:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:55,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:55,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:55,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:55,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399449721] [2022-04-06 20:45:55,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399449721] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:55,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189651458] [2022-04-06 20:45:55,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:55,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:55,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:55,530 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:55,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-06 20:45:55,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:55,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:55,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:45:55,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:55,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:55,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189651458] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:55,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:55,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 33 [2022-04-06 20:45:55,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:55,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971378076] [2022-04-06 20:45:55,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971378076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:55,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:55,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:45:55,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017771818] [2022-04-06 20:45:55,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:55,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:45:55,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:55,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:45:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:45:55,884 INFO L87 Difference]: Start difference. First operand 878 states and 1129 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:57,923 INFO L93 Difference]: Finished difference Result 1007 states and 1331 transitions. [2022-04-06 20:45:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:45:57,923 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 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 56 [2022-04-06 20:45:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:57,924 INFO L225 Difference]: With dead ends: 1007 [2022-04-06 20:45:57,924 INFO L226 Difference]: Without dead ends: 989 [2022-04-06 20:45:57,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:45:57,925 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 118 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:57,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 61 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:45:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-04-06 20:45:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 951. [2022-04-06 20:45:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 946 states have (on average 1.291754756871036) internal successors, (1222), 946 states have internal predecessors, (1222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1226 transitions. [2022-04-06 20:45:58,886 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1226 transitions. Word has length 56 [2022-04-06 20:45:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:58,886 INFO L478 AbstractCegarLoop]: Abstraction has 951 states and 1226 transitions. [2022-04-06 20:45:58,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1226 transitions. [2022-04-06 20:45:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:45:58,887 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:58,887 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:58,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:59,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-06 20:45:59,087 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:59,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2092475683, now seen corresponding path program 81 times [2022-04-06 20:45:59,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:59,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [600021388] [2022-04-06 20:45:59,088 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:59,088 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:59,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2092475683, now seen corresponding path program 82 times [2022-04-06 20:45:59,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:59,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436719998] [2022-04-06 20:45:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:59,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:59,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:59,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:59,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436719998] [2022-04-06 20:45:59,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436719998] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:59,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067374303] [2022-04-06 20:45:59,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:59,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:59,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:59,524 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:59,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-06 20:45:59,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:59,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:59,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:45:59,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 13 proven. 169 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:46:00,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 13 proven. 169 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:46:00,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067374303] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:00,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:00,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16, 16] total 46 [2022-04-06 20:46:00,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:00,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [600021388] [2022-04-06 20:46:00,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [600021388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:00,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:00,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:46:00,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162495703] [2022-04-06 20:46:00,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:00,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:46:00,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:00,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:46:00,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:46:00,112 INFO L87 Difference]: Start difference. First operand 951 states and 1226 transitions. Second operand has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:13,935 INFO L93 Difference]: Finished difference Result 1318 states and 1771 transitions. [2022-04-06 20:46:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2022-04-06 20:46:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 states have internal predecessors, (52), 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 56 [2022-04-06 20:46:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:13,936 INFO L225 Difference]: With dead ends: 1318 [2022-04-06 20:46:13,936 INFO L226 Difference]: Without dead ends: 1294 [2022-04-06 20:46:13,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24314 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1591, Invalid=69965, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 20:46:13,939 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 238 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 12500 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 13171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 12500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:13,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 216 Invalid, 13171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [671 Valid, 12500 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:46:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-04-06 20:46:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 967. [2022-04-06 20:46:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 962 states have (on average 1.2869022869022868) internal successors, (1238), 962 states have internal predecessors, (1238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1242 transitions. [2022-04-06 20:46:14,971 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1242 transitions. Word has length 56 [2022-04-06 20:46:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:14,971 INFO L478 AbstractCegarLoop]: Abstraction has 967 states and 1242 transitions. [2022-04-06 20:46:14,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.625) internal successors, (52), 31 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:14,971 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1242 transitions. [2022-04-06 20:46:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:46:14,972 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:14,972 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:14,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-04-06 20:46:15,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-06 20:46:15,173 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1923775565, now seen corresponding path program 83 times [2022-04-06 20:46:15,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:15,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1872603440] [2022-04-06 20:46:15,174 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:15,174 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:15,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1923775565, now seen corresponding path program 84 times [2022-04-06 20:46:15,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:15,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946019537] [2022-04-06 20:46:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:15,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:15,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:46:15,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946019537] [2022-04-06 20:46:15,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946019537] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507117622] [2022-04-06 20:46:15,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:15,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:15,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:15,549 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:15,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-06 20:46:16,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:46:16,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:16,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:46:16,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 44 proven. 121 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:46:16,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 44 proven. 121 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:46:16,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507117622] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:16,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:16,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 14, 14] total 42 [2022-04-06 20:46:16,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:16,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1872603440] [2022-04-06 20:46:16,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1872603440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:16,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:16,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:46:16,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444601550] [2022-04-06 20:46:16,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:16,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:46:16,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:46:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1630, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:46:16,835 INFO L87 Difference]: Start difference. First operand 967 states and 1242 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:25,345 INFO L93 Difference]: Finished difference Result 1289 states and 1659 transitions. [2022-04-06 20:46:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:46:25,346 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 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 56 [2022-04-06 20:46:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:25,347 INFO L225 Difference]: With dead ends: 1289 [2022-04-06 20:46:25,347 INFO L226 Difference]: Without dead ends: 1265 [2022-04-06 20:46:25,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2953 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=642, Invalid=13638, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:46:25,348 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 104 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4550 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 4785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 4550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:25,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 192 Invalid, 4785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4550 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:46:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-04-06 20:46:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 968. [2022-04-06 20:46:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 963 states have (on average 1.2866043613707165) internal successors, (1239), 963 states have internal predecessors, (1239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1243 transitions. [2022-04-06 20:46:26,724 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1243 transitions. Word has length 56 [2022-04-06 20:46:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:26,724 INFO L478 AbstractCegarLoop]: Abstraction has 968 states and 1243 transitions. [2022-04-06 20:46:26,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1243 transitions. [2022-04-06 20:46:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:46:26,726 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:26,726 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:26,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-04-06 20:46:26,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-06 20:46:26,927 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1525626286, now seen corresponding path program 145 times [2022-04-06 20:46:26,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:26,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1833768975] [2022-04-06 20:46:26,928 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:26,928 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1525626286, now seen corresponding path program 146 times [2022-04-06 20:46:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357851886] [2022-04-06 20:46:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:27,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 20:46:27,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:27,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357851886] [2022-04-06 20:46:27,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357851886] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:27,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747275200] [2022-04-06 20:46:27,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:27,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:27,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:27,248 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:27,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-06 20:46:27,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:27,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:27,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:46:27,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:46:27,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:46:28,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747275200] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:28,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:28,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 34, 34] total 68 [2022-04-06 20:46:28,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:28,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1833768975] [2022-04-06 20:46:28,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1833768975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:28,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:28,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:46:28,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056344681] [2022-04-06 20:46:28,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:28,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:46:28,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:46:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:46:28,880 INFO L87 Difference]: Start difference. First operand 968 states and 1243 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:36,280 INFO L93 Difference]: Finished difference Result 1439 states and 1814 transitions. [2022-04-06 20:46:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:46:36,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 56 [2022-04-06 20:46:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:36,281 INFO L225 Difference]: With dead ends: 1439 [2022-04-06 20:46:36,281 INFO L226 Difference]: Without dead ends: 1411 [2022-04-06 20:46:36,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1720, Invalid=9200, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:46:36,282 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 118 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3443 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 3443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:36,282 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 189 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 3443 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:46:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-04-06 20:46:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 968. [2022-04-06 20:46:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 963 states have (on average 1.2855659397715473) internal successors, (1238), 963 states have internal predecessors, (1238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1242 transitions. [2022-04-06 20:46:37,282 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1242 transitions. Word has length 56 [2022-04-06 20:46:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:37,282 INFO L478 AbstractCegarLoop]: Abstraction has 968 states and 1242 transitions. [2022-04-06 20:46:37,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1242 transitions. [2022-04-06 20:46:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:46:37,283 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:37,283 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:37,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-04-06 20:46:37,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:37,491 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash 389303298, now seen corresponding path program 147 times [2022-04-06 20:46:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:37,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [649594877] [2022-04-06 20:46:37,492 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:37,492 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash 389303298, now seen corresponding path program 148 times [2022-04-06 20:46:37,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:37,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468601607] [2022-04-06 20:46:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:37,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:37,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-04-06 20:46:37,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468601607] [2022-04-06 20:46:37,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468601607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742159769] [2022-04-06 20:46:37,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:37,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:37,774 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:37,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-06 20:46:37,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:37,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:37,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:46:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-04-06 20:46:37,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-04-06 20:46:38,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742159769] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:38,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:38,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:46:38,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:38,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [649594877] [2022-04-06 20:46:38,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [649594877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:38,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:38,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:46:38,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653354712] [2022-04-06 20:46:38,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:38,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:46:38,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:46:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1844, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:46:38,600 INFO L87 Difference]: Start difference. First operand 968 states and 1242 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:46,466 INFO L93 Difference]: Finished difference Result 1491 states and 1873 transitions. [2022-04-06 20:46:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:46:46,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 56 [2022-04-06 20:46:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:46,468 INFO L225 Difference]: With dead ends: 1491 [2022-04-06 20:46:46,468 INFO L226 Difference]: Without dead ends: 1463 [2022-04-06 20:46:46,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1204, Invalid=5116, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:46:46,469 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 130 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3601 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:46,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 196 Invalid, 3730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3601 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:46:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-04-06 20:46:47,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 968. [2022-04-06 20:46:47,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 963 states have (on average 1.284527518172378) internal successors, (1237), 963 states have internal predecessors, (1237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1241 transitions. [2022-04-06 20:46:47,464 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1241 transitions. Word has length 56 [2022-04-06 20:46:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:47,464 INFO L478 AbstractCegarLoop]: Abstraction has 968 states and 1241 transitions. [2022-04-06 20:46:47,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:47,464 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1241 transitions. [2022-04-06 20:46:47,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:46:47,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:47,465 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:47,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-04-06 20:46:47,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-04-06 20:46:47,665 INFO L403 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:47,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:47,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1765682094, now seen corresponding path program 149 times [2022-04-06 20:46:47,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:47,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1463149698] [2022-04-06 20:46:47,666 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:47,667 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:47,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1765682094, now seen corresponding path program 150 times [2022-04-06 20:46:47,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:47,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243886395] [2022-04-06 20:46:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:47,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:47,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-04-06 20:46:47,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:47,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243886395] [2022-04-06 20:46:47,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243886395] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:47,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994697207] [2022-04-06 20:46:47,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:47,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:47,953 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:47,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-06 20:46:49,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:46:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:49,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:46:49,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 56 proven. 12 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-06 20:46:49,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 57 proven. 11 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-04-06 20:46:49,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994697207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:49,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:49,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10, 10] total 40 [2022-04-06 20:46:49,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:49,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1463149698] [2022-04-06 20:46:49,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1463149698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:49,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:49,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:46:49,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226729534] [2022-04-06 20:46:49,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:49,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:46:49,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:46:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:46:49,872 INFO L87 Difference]: Start difference. First operand 968 states and 1241 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:58,138 INFO L93 Difference]: Finished difference Result 1544 states and 1933 transitions. [2022-04-06 20:46:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:46:58,139 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 56 [2022-04-06 20:46:58,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:58,140 INFO L225 Difference]: With dead ends: 1544 [2022-04-06 20:46:58,140 INFO L226 Difference]: Without dead ends: 1516 [2022-04-06 20:46:58,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=347, Invalid=4209, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:46:58,141 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 139 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3614 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:58,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 198 Invalid, 3736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3614 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:46:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2022-04-06 20:46:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 968. [2022-04-06 20:46:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 963 states have (on average 1.2834890965732086) internal successors, (1236), 963 states have internal predecessors, (1236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1240 transitions. [2022-04-06 20:46:59,177 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1240 transitions. Word has length 56 [2022-04-06 20:46:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:59,178 INFO L478 AbstractCegarLoop]: Abstraction has 968 states and 1240 transitions. [2022-04-06 20:46:59,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1240 transitions. [2022-04-06 20:46:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:46:59,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:59,179 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:59,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:59,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:59,379 INFO L403 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:59,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:59,380 INFO L85 PathProgramCache]: Analyzing trace with hash 104464898, now seen corresponding path program 151 times [2022-04-06 20:46:59,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:59,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557728346] [2022-04-06 20:46:59,380 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:59,380 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:59,380 INFO L85 PathProgramCache]: Analyzing trace with hash 104464898, now seen corresponding path program 152 times [2022-04-06 20:46:59,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:59,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805340380] [2022-04-06 20:46:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:59,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:59,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-04-06 20:46:59,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:59,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805340380] [2022-04-06 20:46:59,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805340380] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:59,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43177637] [2022-04-06 20:46:59,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:59,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:59,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:59,651 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:59,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-04-06 20:46:59,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:59,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:59,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:46:59,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:00,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:01,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43177637] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:01,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:01,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 40, 40] total 80 [2022-04-06 20:47:01,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:01,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557728346] [2022-04-06 20:47:01,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557728346] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:01,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:01,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:47:01,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484502452] [2022-04-06 20:47:01,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:01,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:47:01,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:01,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:47:01,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=5421, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:47:01,629 INFO L87 Difference]: Start difference. First operand 968 states and 1240 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:10,482 INFO L93 Difference]: Finished difference Result 1598 states and 1994 transitions. [2022-04-06 20:47:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:47:10,482 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 56 [2022-04-06 20:47:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:10,484 INFO L225 Difference]: With dead ends: 1598 [2022-04-06 20:47:10,484 INFO L226 Difference]: Without dead ends: 1570 [2022-04-06 20:47:10,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1552, Invalid=9368, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:47:10,485 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 153 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3799 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 3922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:10,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 205 Invalid, 3922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3799 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:47:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-04-06 20:47:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 968. [2022-04-06 20:47:11,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 963 states have (on average 1.2824506749740394) internal successors, (1235), 963 states have internal predecessors, (1235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1239 transitions. [2022-04-06 20:47:11,497 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1239 transitions. Word has length 56 [2022-04-06 20:47:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:11,497 INFO L478 AbstractCegarLoop]: Abstraction has 968 states and 1239 transitions. [2022-04-06 20:47:11,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1239 transitions. [2022-04-06 20:47:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:47:11,498 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:11,498 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:11,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:11,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:11,699 INFO L403 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:11,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2106493010, now seen corresponding path program 153 times [2022-04-06 20:47:11,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:11,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [731207898] [2022-04-06 20:47:11,700 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:11,700 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:11,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2106493010, now seen corresponding path program 154 times [2022-04-06 20:47:11,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:11,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997634797] [2022-04-06 20:47:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:11,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:12,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:47:12,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:12,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997634797] [2022-04-06 20:47:12,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997634797] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:12,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870650515] [2022-04-06 20:47:12,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:12,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:12,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:12,405 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:12,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-04-06 20:47:12,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:12,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:12,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:47:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:47:12,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:47:14,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870650515] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:14,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:14,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 20:47:14,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:14,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [731207898] [2022-04-06 20:47:14,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [731207898] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:14,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:14,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:47:14,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392844531] [2022-04-06 20:47:14,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:14,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:47:14,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:47:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1615, Invalid=5357, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:47:14,597 INFO L87 Difference]: Start difference. First operand 968 states and 1239 transitions. Second operand has 43 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 42 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:33,939 INFO L93 Difference]: Finished difference Result 2272 states and 3214 transitions. [2022-04-06 20:47:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:47:33,940 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 42 states have internal predecessors, (52), 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 56 [2022-04-06 20:47:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:33,942 INFO L225 Difference]: With dead ends: 2272 [2022-04-06 20:47:33,942 INFO L226 Difference]: Without dead ends: 2233 [2022-04-06 20:47:33,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3349, Invalid=12151, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:47:33,943 INFO L913 BasicCegarLoop]: 211 mSDtfsCounter, 350 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 15438 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 15693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 15438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:33,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 413 Invalid, 15693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 15438 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 20:47:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2022-04-06 20:47:34,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 992. [2022-04-06 20:47:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 987 states have (on average 1.286727456940223) internal successors, (1270), 987 states have internal predecessors, (1270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:34,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1274 transitions. [2022-04-06 20:47:34,972 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1274 transitions. Word has length 56 [2022-04-06 20:47:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:34,973 INFO L478 AbstractCegarLoop]: Abstraction has 992 states and 1274 transitions. [2022-04-06 20:47:34,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 42 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1274 transitions. [2022-04-06 20:47:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:47:34,974 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:34,974 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:34,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:35,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:35,174 INFO L403 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:35,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:35,175 INFO L85 PathProgramCache]: Analyzing trace with hash 851459504, now seen corresponding path program 31 times [2022-04-06 20:47:35,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:35,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [573131615] [2022-04-06 20:47:35,176 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:35,176 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:35,176 INFO L85 PathProgramCache]: Analyzing trace with hash 851459504, now seen corresponding path program 32 times [2022-04-06 20:47:35,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:35,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515246776] [2022-04-06 20:47:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:35,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:35,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:47:35,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:35,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515246776] [2022-04-06 20:47:35,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515246776] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:35,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553171734] [2022-04-06 20:47:35,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:35,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:35,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:35,320 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:35,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-04-06 20:47:35,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:35,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:35,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:47:35,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:47:35,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 20:47:35,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553171734] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:35,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:35,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-04-06 20:47:35,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:35,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [573131615] [2022-04-06 20:47:35,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [573131615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:35,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:35,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:47:35,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708122178] [2022-04-06 20:47:35,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:35,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:47:35,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:47:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:47:35,551 INFO L87 Difference]: Start difference. First operand 992 states and 1274 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:37,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:37,018 INFO L93 Difference]: Finished difference Result 1017 states and 1301 transitions. [2022-04-06 20:47:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:47:37,018 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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 57 [2022-04-06 20:47:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:37,019 INFO L225 Difference]: With dead ends: 1017 [2022-04-06 20:47:37,019 INFO L226 Difference]: Without dead ends: 972 [2022-04-06 20:47:37,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:47:37,020 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:37,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 87 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:47:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-04-06 20:47:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 964. [2022-04-06 20:47:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 959 states have (on average 1.2930135557872784) internal successors, (1240), 959 states have internal predecessors, (1240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1244 transitions. [2022-04-06 20:47:38,043 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1244 transitions. Word has length 57 [2022-04-06 20:47:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:38,043 INFO L478 AbstractCegarLoop]: Abstraction has 964 states and 1244 transitions. [2022-04-06 20:47:38,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1244 transitions. [2022-04-06 20:47:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:47:38,044 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:38,045 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:38,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-04-06 20:47:38,245 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:38,245 INFO L403 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1427280065, now seen corresponding path program 85 times [2022-04-06 20:47:38,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:38,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960598551] [2022-04-06 20:47:38,246 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:38,246 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:38,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1427280065, now seen corresponding path program 86 times [2022-04-06 20:47:38,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:38,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920356585] [2022-04-06 20:47:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:38,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:38,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:47:38,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:38,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920356585] [2022-04-06 20:47:38,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920356585] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:38,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093977197] [2022-04-06 20:47:38,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:38,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:38,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:38,651 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:38,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-04-06 20:47:38,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:38,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:38,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:47:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 36 proven. 144 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 20:47:39,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 36 proven. 144 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 20:47:39,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093977197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:39,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:39,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15, 15] total 44 [2022-04-06 20:47:39,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:39,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960598551] [2022-04-06 20:47:39,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960598551] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:39,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:39,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:47:39,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760060498] [2022-04-06 20:47:39,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:39,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:47:39,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:39,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:47:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1795, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:47:39,251 INFO L87 Difference]: Start difference. First operand 964 states and 1244 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:47,115 INFO L93 Difference]: Finished difference Result 1271 states and 1640 transitions. [2022-04-06 20:47:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:47:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 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 57 [2022-04-06 20:47:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:47,117 INFO L225 Difference]: With dead ends: 1271 [2022-04-06 20:47:47,117 INFO L226 Difference]: Without dead ends: 1247 [2022-04-06 20:47:47,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=649, Invalid=14113, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:47:47,117 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 99 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3705 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 3705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:47,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 155 Invalid, 3932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 3705 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:47:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-04-06 20:47:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 965. [2022-04-06 20:47:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 960 states have (on average 1.2927083333333333) internal successors, (1241), 960 states have internal predecessors, (1241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1245 transitions. [2022-04-06 20:47:48,124 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1245 transitions. Word has length 57 [2022-04-06 20:47:48,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:48,124 INFO L478 AbstractCegarLoop]: Abstraction has 965 states and 1245 transitions. [2022-04-06 20:47:48,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1245 transitions. [2022-04-06 20:47:48,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:47:48,125 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:48,125 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:48,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-04-06 20:47:48,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-04-06 20:47:48,325 INFO L403 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash 360787039, now seen corresponding path program 155 times [2022-04-06 20:47:48,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:48,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869107296] [2022-04-06 20:47:48,326 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:48,327 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 360787039, now seen corresponding path program 156 times [2022-04-06 20:47:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093754919] [2022-04-06 20:47:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:49,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:47:49,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:49,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093754919] [2022-04-06 20:47:49,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093754919] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:49,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983338561] [2022-04-06 20:47:49,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:49,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:49,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:49,091 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:49,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-04-06 20:47:49,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:47:49,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:49,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:47:49,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-04-06 20:47:49,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-04-06 20:47:49,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983338561] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:49,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:49,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 8, 8] total 53 [2022-04-06 20:47:49,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869107296] [2022-04-06 20:47:49,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869107296] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:49,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:49,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:47:49,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561238630] [2022-04-06 20:47:49,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:49,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:47:49,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:49,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:47:49,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2639, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:47:49,612 INFO L87 Difference]: Start difference. First operand 965 states and 1245 transitions. Second operand has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 43 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:09,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:09,474 INFO L93 Difference]: Finished difference Result 2265 states and 3204 transitions. [2022-04-06 20:48:09,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:48:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 43 states have internal predecessors, (53), 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 57 [2022-04-06 20:48:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:09,476 INFO L225 Difference]: With dead ends: 2265 [2022-04-06 20:48:09,476 INFO L226 Difference]: Without dead ends: 2225 [2022-04-06 20:48:09,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=304, Invalid=8626, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:48:09,477 INFO L913 BasicCegarLoop]: 216 mSDtfsCounter, 349 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 15798 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 16053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 15798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:09,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 418 Invalid, 16053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 15798 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 20:48:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2022-04-06 20:48:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 989. [2022-04-06 20:48:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 984 states have (on average 1.2967479674796747) internal successors, (1276), 984 states have internal predecessors, (1276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1280 transitions. [2022-04-06 20:48:10,527 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1280 transitions. Word has length 57 [2022-04-06 20:48:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:10,527 INFO L478 AbstractCegarLoop]: Abstraction has 989 states and 1280 transitions. [2022-04-06 20:48:10,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 43 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:10,527 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1280 transitions. [2022-04-06 20:48:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:48:10,528 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:10,528 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:10,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:10,729 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-04-06 20:48:10,729 INFO L403 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:10,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2064177805, now seen corresponding path program 87 times [2022-04-06 20:48:10,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:10,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655900426] [2022-04-06 20:48:10,730 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:10,730 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2064177805, now seen corresponding path program 88 times [2022-04-06 20:48:10,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:10,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250748355] [2022-04-06 20:48:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:10,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:11,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:48:11,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:11,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250748355] [2022-04-06 20:48:11,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250748355] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:11,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730608004] [2022-04-06 20:48:11,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:11,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:11,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:11,160 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:11,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-04-06 20:48:11,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:11,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:48:11,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 26 proven. 169 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-04-06 20:48:11,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 26 proven. 169 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-04-06 20:48:11,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730608004] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:11,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:11,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16, 16] total 46 [2022-04-06 20:48:11,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:11,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655900426] [2022-04-06 20:48:11,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655900426] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:11,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:11,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:48:11,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191259798] [2022-04-06 20:48:11,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:11,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:48:11,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:11,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:48:11,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1968, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:48:11,787 INFO L87 Difference]: Start difference. First operand 989 states and 1280 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:20,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:20,399 INFO L93 Difference]: Finished difference Result 1296 states and 1676 transitions. [2022-04-06 20:48:20,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:48:20,399 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 31 states have internal predecessors, (41), 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 58 [2022-04-06 20:48:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:20,400 INFO L225 Difference]: With dead ends: 1296 [2022-04-06 20:48:20,400 INFO L226 Difference]: Without dead ends: 1272 [2022-04-06 20:48:20,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3432 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=702, Invalid=16068, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:48:20,401 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 94 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5283 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 5517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 5283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:20,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 210 Invalid, 5517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 5283 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:48:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-04-06 20:48:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 990. [2022-04-06 20:48:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 985 states have (on average 1.2964467005076141) internal successors, (1277), 985 states have internal predecessors, (1277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1281 transitions. [2022-04-06 20:48:21,423 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1281 transitions. Word has length 58 [2022-04-06 20:48:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:21,423 INFO L478 AbstractCegarLoop]: Abstraction has 990 states and 1281 transitions. [2022-04-06 20:48:21,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1281 transitions. [2022-04-06 20:48:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:48:21,424 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:21,424 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:21,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-04-06 20:48:21,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:21,631 INFO L403 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash -387934348, now seen corresponding path program 157 times [2022-04-06 20:48:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122842128] [2022-04-06 20:48:21,632 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:21,632 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash -387934348, now seen corresponding path program 158 times [2022-04-06 20:48:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923401172] [2022-04-06 20:48:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:21,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:21,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-04-06 20:48:21,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923401172] [2022-04-06 20:48:21,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923401172] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496953666] [2022-04-06 20:48:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:21,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:21,933 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:21,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-04-06 20:48:21,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:21,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:21,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:48:21,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:48:22,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 20:48:23,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496953666] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:23,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:23,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 34, 34] total 68 [2022-04-06 20:48:23,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:23,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122842128] [2022-04-06 20:48:23,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122842128] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:23,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:23,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:48:23,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603390794] [2022-04-06 20:48:23,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:23,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:48:23,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:23,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:48:23,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:48:23,451 INFO L87 Difference]: Start difference. First operand 990 states and 1281 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:32,331 INFO L93 Difference]: Finished difference Result 1424 states and 1808 transitions. [2022-04-06 20:48:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:48:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 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 58 [2022-04-06 20:48:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:32,333 INFO L225 Difference]: With dead ends: 1424 [2022-04-06 20:48:32,333 INFO L226 Difference]: Without dead ends: 1395 [2022-04-06 20:48:32,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1983, Invalid=10449, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:48:32,334 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 112 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2954 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:32,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 165 Invalid, 3107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2954 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:48:32,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-04-06 20:48:33,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 990. [2022-04-06 20:48:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 985 states have (on average 1.2954314720812183) internal successors, (1276), 985 states have internal predecessors, (1276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1280 transitions. [2022-04-06 20:48:33,571 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1280 transitions. Word has length 58 [2022-04-06 20:48:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:33,571 INFO L478 AbstractCegarLoop]: Abstraction has 990 states and 1280 transitions. [2022-04-06 20:48:33,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1280 transitions. [2022-04-06 20:48:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:48:33,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:33,572 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:33,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:33,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-04-06 20:48:33,773 INFO L403 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:33,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2013914909, now seen corresponding path program 89 times [2022-04-06 20:48:33,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:33,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149306557] [2022-04-06 20:48:33,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:33,774 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:33,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2013914909, now seen corresponding path program 90 times [2022-04-06 20:48:33,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:33,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433453615] [2022-04-06 20:48:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:33,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:34,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:48:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433453615] [2022-04-06 20:48:34,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433453615] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506013647] [2022-04-06 20:48:34,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:34,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:34,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:34,166 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:34,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-04-06 20:48:35,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:48:35,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:35,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:48:35,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:35,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:36,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506013647] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:36,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:36,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 34] total 68 [2022-04-06 20:48:36,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:36,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149306557] [2022-04-06 20:48:36,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149306557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:36,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:36,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:48:36,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684213117] [2022-04-06 20:48:36,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:36,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:48:36,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:48:36,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=3893, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:48:36,652 INFO L87 Difference]: Start difference. First operand 990 states and 1280 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:45,374 INFO L93 Difference]: Finished difference Result 1404 states and 1790 transitions. [2022-04-06 20:48:45,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:48:45,374 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 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 58 [2022-04-06 20:48:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:45,376 INFO L225 Difference]: With dead ends: 1404 [2022-04-06 20:48:45,376 INFO L226 Difference]: Without dead ends: 1296 [2022-04-06 20:48:45,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3574 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3391, Invalid=18071, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 20:48:45,377 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 109 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4251 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 4486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 4251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:45,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 175 Invalid, 4486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4251 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:48:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-04-06 20:48:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 991. [2022-04-06 20:48:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 986 states have (on average 1.291075050709939) internal successors, (1273), 986 states have internal predecessors, (1273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1277 transitions. [2022-04-06 20:48:46,422 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1277 transitions. Word has length 58 [2022-04-06 20:48:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:46,423 INFO L478 AbstractCegarLoop]: Abstraction has 991 states and 1277 transitions. [2022-04-06 20:48:46,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 30 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1277 transitions. [2022-04-06 20:48:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:48:46,424 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:46,424 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:46,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-04-06 20:48:46,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-04-06 20:48:46,624 INFO L403 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:46,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash 840357282, now seen corresponding path program 159 times [2022-04-06 20:48:46,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:46,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [999729075] [2022-04-06 20:48:46,625 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:46,625 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash 840357282, now seen corresponding path program 160 times [2022-04-06 20:48:46,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:46,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880176621] [2022-04-06 20:48:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:46,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:46,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 20:48:46,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880176621] [2022-04-06 20:48:46,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880176621] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609824894] [2022-04-06 20:48:46,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:46,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:46,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:46,922 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:46,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-04-06 20:48:46,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:46,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:48:46,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 20:48:47,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 20:48:47,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609824894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:47,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:47,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:48:47,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:47,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [999729075] [2022-04-06 20:48:47,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [999729075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:47,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:47,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:48:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791966849] [2022-04-06 20:48:47,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:47,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:48:47,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:48:47,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2022, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:48:47,758 INFO L87 Difference]: Start difference. First operand 991 states and 1277 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:56,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:56,141 INFO L93 Difference]: Finished difference Result 1476 states and 1862 transitions. [2022-04-06 20:48:56,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:48:56,141 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 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 58 [2022-04-06 20:48:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:56,143 INFO L225 Difference]: With dead ends: 1476 [2022-04-06 20:48:56,143 INFO L226 Difference]: Without dead ends: 1447 [2022-04-06 20:48:56,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1418, Invalid=6238, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:48:56,143 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 121 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3616 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 3753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 3616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:56,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 192 Invalid, 3753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 3616 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:48:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2022-04-06 20:48:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 991. [2022-04-06 20:48:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 986 states have (on average 1.2900608519269776) internal successors, (1272), 986 states have internal predecessors, (1272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:57,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1276 transitions. [2022-04-06 20:48:57,174 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1276 transitions. Word has length 58 [2022-04-06 20:48:57,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:57,175 INFO L478 AbstractCegarLoop]: Abstraction has 991 states and 1276 transitions. [2022-04-06 20:48:57,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:57,175 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1276 transitions. [2022-04-06 20:48:57,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:48:57,176 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:57,176 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:57,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:57,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-04-06 20:48:57,392 INFO L403 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash 187242932, now seen corresponding path program 161 times [2022-04-06 20:48:57,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:57,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1395399097] [2022-04-06 20:48:57,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:57,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash 187242932, now seen corresponding path program 162 times [2022-04-06 20:48:57,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:57,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045975133] [2022-04-06 20:48:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:57,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:57,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 20:48:57,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:57,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045975133] [2022-04-06 20:48:57,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045975133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:57,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573953905] [2022-04-06 20:48:57,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:57,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:57,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:57,698 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:57,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-04-06 20:48:59,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:48:59,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:59,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:48:59,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 20:49:00,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 20:49:00,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573953905] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:00,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:00,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:49:00,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:00,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1395399097] [2022-04-06 20:49:00,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1395399097] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:00,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:00,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:49:00,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162144471] [2022-04-06 20:49:00,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:00,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:49:00,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:49:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:49:00,683 INFO L87 Difference]: Start difference. First operand 991 states and 1276 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:09,499 INFO L93 Difference]: Finished difference Result 1528 states and 1920 transitions. [2022-04-06 20:49:09,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:49:09,499 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 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 58 [2022-04-06 20:49:09,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:09,501 INFO L225 Difference]: With dead ends: 1528 [2022-04-06 20:49:09,501 INFO L226 Difference]: Without dead ends: 1499 [2022-04-06 20:49:09,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1297, Invalid=5509, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:49:09,501 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 131 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3768 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:09,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 199 Invalid, 3895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3768 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:49:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2022-04-06 20:49:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 991. [2022-04-06 20:49:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 986 states have (on average 1.2890466531440161) internal successors, (1271), 986 states have internal predecessors, (1271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1275 transitions. [2022-04-06 20:49:10,565 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1275 transitions. Word has length 58 [2022-04-06 20:49:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:10,565 INFO L478 AbstractCegarLoop]: Abstraction has 991 states and 1275 transitions. [2022-04-06 20:49:10,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1275 transitions. [2022-04-06 20:49:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:49:10,566 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:10,566 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:10,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:10,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:10,766 INFO L403 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1080751262, now seen corresponding path program 163 times [2022-04-06 20:49:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:10,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289248555] [2022-04-06 20:49:10,767 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:10,768 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1080751262, now seen corresponding path program 164 times [2022-04-06 20:49:10,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:10,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410971055] [2022-04-06 20:49:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:11,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 20:49:11,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:11,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410971055] [2022-04-06 20:49:11,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410971055] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:11,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567612741] [2022-04-06 20:49:11,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:11,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:11,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:11,065 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:11,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-04-06 20:49:11,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:11,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:49:11,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 348 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:49:11,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 348 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:49:13,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567612741] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:13,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:13,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 40, 40] total 80 [2022-04-06 20:49:13,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:13,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289248555] [2022-04-06 20:49:13,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289248555] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:13,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:13,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:49:13,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501172066] [2022-04-06 20:49:13,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:13,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:49:13,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:13,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:49:13,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=5421, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:49:13,033 INFO L87 Difference]: Start difference. First operand 991 states and 1275 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:22,285 INFO L93 Difference]: Finished difference Result 1581 states and 1979 transitions. [2022-04-06 20:49:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:49:22,285 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 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 58 [2022-04-06 20:49:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:22,287 INFO L225 Difference]: With dead ends: 1581 [2022-04-06 20:49:22,287 INFO L226 Difference]: Without dead ends: 1552 [2022-04-06 20:49:22,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1716, Invalid=10056, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:49:22,287 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 140 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3597 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:22,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 196 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3597 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:49:22,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2022-04-06 20:49:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 991. [2022-04-06 20:49:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 986 states have (on average 1.2880324543610548) internal successors, (1270), 986 states have internal predecessors, (1270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1274 transitions. [2022-04-06 20:49:23,369 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1274 transitions. Word has length 58 [2022-04-06 20:49:23,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:23,369 INFO L478 AbstractCegarLoop]: Abstraction has 991 states and 1274 transitions. [2022-04-06 20:49:23,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:23,369 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1274 transitions. [2022-04-06 20:49:23,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:49:23,370 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:23,370 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:23,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-04-06 20:49:23,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:23,571 INFO L403 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash -567464972, now seen corresponding path program 165 times [2022-04-06 20:49:23,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:23,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067041229] [2022-04-06 20:49:23,572 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:23,572 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash -567464972, now seen corresponding path program 166 times [2022-04-06 20:49:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:23,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530887939] [2022-04-06 20:49:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:23,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:23,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 20:49:23,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:23,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530887939] [2022-04-06 20:49:23,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530887939] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:23,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012783002] [2022-04-06 20:49:23,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:23,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:23,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:23,896 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:23,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-04-06 20:49:23,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:23,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:23,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:49:23,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 20:49:24,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-04-06 20:49:24,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012783002] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:24,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:24,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:49:24,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:24,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067041229] [2022-04-06 20:49:24,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067041229] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:24,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:24,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:49:24,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458954495] [2022-04-06 20:49:24,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:24,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:49:24,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:24,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:49:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1941, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:49:24,783 INFO L87 Difference]: Start difference. First operand 991 states and 1274 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:34,387 INFO L93 Difference]: Finished difference Result 1635 states and 2039 transitions. [2022-04-06 20:49:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:49:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 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 58 [2022-04-06 20:49:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:34,389 INFO L225 Difference]: With dead ends: 1635 [2022-04-06 20:49:34,389 INFO L226 Difference]: Without dead ends: 1606 [2022-04-06 20:49:34,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1166, Invalid=4534, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:49:34,389 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 155 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4135 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 4257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:34,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 213 Invalid, 4257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4135 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:49:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-04-06 20:49:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 991. [2022-04-06 20:49:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 986 states have (on average 1.2870182555780934) internal successors, (1269), 986 states have internal predecessors, (1269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1273 transitions. [2022-04-06 20:49:35,486 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1273 transitions. Word has length 58 [2022-04-06 20:49:35,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:35,486 INFO L478 AbstractCegarLoop]: Abstraction has 991 states and 1273 transitions. [2022-04-06 20:49:35,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1273 transitions. [2022-04-06 20:49:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:49:35,487 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:35,487 INFO L499 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:35,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-04-06 20:49:35,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:35,688 INFO L403 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:35,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2078476786, now seen corresponding path program 167 times [2022-04-06 20:49:35,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:35,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [901172481] [2022-04-06 20:49:35,689 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:35,689 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2078476786, now seen corresponding path program 168 times [2022-04-06 20:49:35,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:35,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491882023] [2022-04-06 20:49:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:35,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:36,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 781 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:49:36,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:36,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491882023] [2022-04-06 20:49:36,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491882023] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:36,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616163572] [2022-04-06 20:49:36,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:36,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:36,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:36,444 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:36,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-04-06 20:49:36,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:49:36,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:49:36,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-04-06 20:49:36,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-04-06 20:49:36,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616163572] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:36,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:36,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 8, 8] total 54 [2022-04-06 20:49:36,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [901172481] [2022-04-06 20:49:36,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [901172481] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:36,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:36,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:49:36,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615498304] [2022-04-06 20:49:36,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:36,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:49:36,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:36,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:49:36,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2743, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:49:36,986 INFO L87 Difference]: Start difference. First operand 991 states and 1273 transitions. Second operand has 45 states, 45 states have (on average 1.2) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:58,617 INFO L93 Difference]: Finished difference Result 2323 states and 3281 transitions. [2022-04-06 20:49:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:49:58,617 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2) internal successors, (54), 44 states have internal predecessors, (54), 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 58 [2022-04-06 20:49:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:58,620 INFO L225 Difference]: With dead ends: 2323 [2022-04-06 20:49:58,620 INFO L226 Difference]: Without dead ends: 2283 [2022-04-06 20:49:58,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=310, Invalid=9002, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:49:58,620 INFO L913 BasicCegarLoop]: 222 mSDtfsCounter, 360 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 17050 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 17312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 17050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:58,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 434 Invalid, 17312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 17050 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-04-06 20:49:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-04-06 20:49:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1015. [2022-04-06 20:49:59,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1010 states have (on average 1.2910891089108911) internal successors, (1304), 1010 states have internal predecessors, (1304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1308 transitions. [2022-04-06 20:49:59,688 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1308 transitions. Word has length 58 [2022-04-06 20:49:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:59,688 INFO L478 AbstractCegarLoop]: Abstraction has 1015 states and 1308 transitions. [2022-04-06 20:49:59,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1308 transitions. [2022-04-06 20:49:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:49:59,689 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:59,689 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:59,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:59,889 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:59,890 INFO L403 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:59,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1369777921, now seen corresponding path program 91 times [2022-04-06 20:49:59,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:59,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [920893034] [2022-04-06 20:49:59,891 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:59,891 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1369777921, now seen corresponding path program 92 times [2022-04-06 20:49:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:59,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614072947] [2022-04-06 20:49:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:59,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:00,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:00,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:00,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614072947] [2022-04-06 20:50:00,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614072947] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:00,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266028432] [2022-04-06 20:50:00,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:00,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:00,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:00,385 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:00,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-04-06 20:50:00,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:00,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:00,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 20:50:00,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:50:00,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:50:01,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266028432] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:01,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:01,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 17, 17] total 49 [2022-04-06 20:50:01,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:01,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [920893034] [2022-04-06 20:50:01,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [920893034] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:01,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:01,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:50:01,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070133826] [2022-04-06 20:50:01,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:01,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:50:01,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:01,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:50:01,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:50:01,059 INFO L87 Difference]: Start difference. First operand 1015 states and 1308 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 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)