/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:06:16,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:06:16,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:06:16,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:06:16,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:06:16,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:06:16,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:06:16,566 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 20:06:16,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:06:16,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:06:16,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:06:16,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:06:16,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:06:16,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:06:16,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:06:16,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:06:16,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:06:16,578 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:06:16,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:06:16,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:06:16,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:06:16,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:06:16,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:06:16,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:06:16,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:06:16,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:06:16,580 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:06:16,580 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:06:16,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:06:16,580 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:06:16,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:06:16,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:06:16,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:06:16,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:06:16,888 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:06:16,888 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:06:16,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2022-04-06 20:06:16,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb704f459/f74339d526454b7e8b35994695a4dcb7/FLAG6be904361 [2022-04-06 20:06:17,377 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:06:17,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i [2022-04-06 20:06:17,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb704f459/f74339d526454b7e8b35994695a4dcb7/FLAG6be904361 [2022-04-06 20:06:17,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb704f459/f74339d526454b7e8b35994695a4dcb7 [2022-04-06 20:06:17,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:06:17,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:06:17,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:06:17,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:06:17,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:06:17,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:06:17" (1/1) ... [2022-04-06 20:06:17,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd8b5fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17, skipping insertion in model container [2022-04-06 20:06:17,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:06:17" (1/1) ... [2022-04-06 20:06:17,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:06:17,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:06:17,624 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i[895,908] [2022-04-06 20:06:17,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:06:17,646 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:06:17,659 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i[895,908] [2022-04-06 20:06:17,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:06:17,678 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:06:17,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17 WrapperNode [2022-04-06 20:06:17,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:06:17,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:06:17,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:06:17,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:06:17,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17" (1/1) ... [2022-04-06 20:06:17,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17" (1/1) ... [2022-04-06 20:06:17,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17" (1/1) ... [2022-04-06 20:06:17,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17" (1/1) ... [2022-04-06 20:06:17,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17" (1/1) ... [2022-04-06 20:06:17,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17" (1/1) ... [2022-04-06 20:06:17,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17" (1/1) ... [2022-04-06 20:06:17,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:06:17,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:06:17,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:06:17,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:06:17,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17" (1/1) ... [2022-04-06 20:06:17,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:06:17,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:17,757 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 20:06:17,780 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 20:06:17,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:06:17,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:06:17,800 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:06:17,800 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 20:06:17,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:06:17,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:06:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:06:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:06:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 20:06:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 20:06:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:06:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:06:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 20:06:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:06:17,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 20:06:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:06:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:06:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:06:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:06:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:06:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:06:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:06:17,868 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:06:17,869 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:06:17,994 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:06:17,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:06:18,000 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 20:06:18,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:06:18 BoogieIcfgContainer [2022-04-06 20:06:18,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:06:18,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:06:18,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:06:18,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:06:18,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:06:17" (1/3) ... [2022-04-06 20:06:18,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a47762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:06:18, skipping insertion in model container [2022-04-06 20:06:18,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:06:17" (2/3) ... [2022-04-06 20:06:18,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a47762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:06:18, skipping insertion in model container [2022-04-06 20:06:18,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:06:18" (3/3) ... [2022-04-06 20:06:18,009 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.i [2022-04-06 20:06:18,014 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:06:18,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:06:18,052 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:06:18,058 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 20:06:18,058 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:06:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 20:06:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:06:18,077 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:18,077 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:18,078 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:18,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:18,082 INFO L85 PathProgramCache]: Analyzing trace with hash -242008288, now seen corresponding path program 1 times [2022-04-06 20:06:18,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:18,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1284035133] [2022-04-06 20:06:18,100 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:06:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash -242008288, now seen corresponding path program 2 times [2022-04-06 20:06:18,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:18,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139592193] [2022-04-06 20:06:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:18,269 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 20:06:18,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:18,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139592193] [2022-04-06 20:06:18,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139592193] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:18,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:18,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:06:18,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:18,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1284035133] [2022-04-06 20:06:18,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1284035133] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:18,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:18,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:06:18,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557059682] [2022-04-06 20:06:18,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:18,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:06:18,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:18,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:06:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:06:18,313 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:18,374 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-04-06 20:06:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:06:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-04-06 20:06:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:18,386 INFO L225 Difference]: With dead ends: 32 [2022-04-06 20:06:18,386 INFO L226 Difference]: Without dead ends: 13 [2022-04-06 20:06:18,389 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 20:06:18,393 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 20:06:18,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-06 20:06:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-06 20:06:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-04-06 20:06:18,431 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-04-06 20:06:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:18,431 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-04-06 20:06:18,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-04-06 20:06:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:06:18,433 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:18,433 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:18,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:06:18,434 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash -251243498, now seen corresponding path program 1 times [2022-04-06 20:06:18,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:18,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [352627916] [2022-04-06 20:06:18,438 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:06:18,439 INFO L85 PathProgramCache]: Analyzing trace with hash -251243498, now seen corresponding path program 2 times [2022-04-06 20:06:18,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:18,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819189609] [2022-04-06 20:06:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:18,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:18,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:18,538 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 20:06:18,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:18,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819189609] [2022-04-06 20:06:18,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819189609] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:18,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:18,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:06:18,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:18,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [352627916] [2022-04-06 20:06:18,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [352627916] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:18,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:18,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:06:18,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262304472] [2022-04-06 20:06:18,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:18,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:06:18,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:18,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:06:18,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:06:18,542 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:18,595 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-04-06 20:06:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:06:18,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 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 11 [2022-04-06 20:06:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:18,598 INFO L225 Difference]: With dead ends: 22 [2022-04-06 20:06:18,599 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 20:06:18,601 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 20:06:18,604 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:18,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 20:06:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 20:06:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 20:06:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-04-06 20:06:18,613 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-04-06 20:06:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:18,613 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-04-06 20:06:18,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-04-06 20:06:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 20:06:18,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:18,614 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:18,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:06:18,615 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:18,615 INFO L85 PathProgramCache]: Analyzing trace with hash 85580979, now seen corresponding path program 1 times [2022-04-06 20:06:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:18,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107438771] [2022-04-06 20:06:18,634 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:18,635 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash 85580979, now seen corresponding path program 2 times [2022-04-06 20:06:18,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:18,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068217437] [2022-04-06 20:06:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:18,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:18,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:18,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:18,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068217437] [2022-04-06 20:06:18,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068217437] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:18,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674295522] [2022-04-06 20:06:18,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:18,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:18,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:18,728 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 20:06:18,757 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 20:06:18,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:18,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 20:06:18,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:18,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:18,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674295522] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:18,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:18,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 20:06:18,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107438771] [2022-04-06 20:06:18,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107438771] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:18,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:18,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:06:18,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582566640] [2022-04-06 20:06:18,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:18,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:06:18,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:06:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:06:18,935 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:18,974 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-04-06 20:06:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:06:18,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 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 13 [2022-04-06 20:06:18,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:18,975 INFO L225 Difference]: With dead ends: 24 [2022-04-06 20:06:18,975 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:06:18,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:06:18,977 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:18,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:06:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:06:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 20:06:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-04-06 20:06:18,982 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-04-06 20:06:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:18,982 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-04-06 20:06:18,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-04-06 20:06:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:06:18,983 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:18,983 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:19,013 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 20:06:19,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:19,200 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1651356176, now seen corresponding path program 3 times [2022-04-06 20:06:19,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:19,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651984730] [2022-04-06 20:06:19,202 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:19,203 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:19,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1651356176, now seen corresponding path program 4 times [2022-04-06 20:06:19,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:19,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441894258] [2022-04-06 20:06:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:19,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:19,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:06:19,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:19,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441894258] [2022-04-06 20:06:19,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441894258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:19,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:19,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:06:19,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:19,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651984730] [2022-04-06 20:06:19,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651984730] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:19,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:19,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:06:19,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877884830] [2022-04-06 20:06:19,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:19,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:06:19,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:19,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:06:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:06:19,255 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:19,290 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-04-06 20:06:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:06:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 20:06:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:19,291 INFO L225 Difference]: With dead ends: 24 [2022-04-06 20:06:19,291 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 20:06:19,291 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 20:06:19,292 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:19,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 20:06:19,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-04-06 20:06:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 20:06:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-06 20:06:19,303 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2022-04-06 20:06:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:19,303 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-06 20:06:19,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-06 20:06:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:06:19,304 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:19,304 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:19,304 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:06:19,305 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1114942101, now seen corresponding path program 1 times [2022-04-06 20:06:19,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:19,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [984618519] [2022-04-06 20:06:19,312 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:19,312 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1114942101, now seen corresponding path program 2 times [2022-04-06 20:06:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:19,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608863674] [2022-04-06 20:06:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:19,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:19,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:19,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:19,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608863674] [2022-04-06 20:06:19,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608863674] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:19,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776910559] [2022-04-06 20:06:19,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:19,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:19,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:19,394 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 20:06:19,395 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 20:06:19,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:19,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:19,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:19,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:19,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776910559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:19,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:19,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:06:19,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:19,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [984618519] [2022-04-06 20:06:19,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [984618519] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:19,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:19,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:06:19,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76222283] [2022-04-06 20:06:19,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:19,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:06:19,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:06:19,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:06:19,614 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 20:06:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:19,694 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-06 20:06:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:06:19,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 20:06:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:19,695 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:06:19,696 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 20:06:19,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:06:19,697 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:19,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:19,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 20:06:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-06 20:06:19,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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 20:06:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-04-06 20:06:19,706 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-04-06 20:06:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:19,707 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-04-06 20:06:19,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 20:06:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-04-06 20:06:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:06:19,707 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:19,708 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:19,741 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 20:06:19,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:19,939 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:19,939 INFO L85 PathProgramCache]: Analyzing trace with hash -133483448, now seen corresponding path program 3 times [2022-04-06 20:06:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:19,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [900498975] [2022-04-06 20:06:19,942 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:19,942 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:19,942 INFO L85 PathProgramCache]: Analyzing trace with hash -133483448, now seen corresponding path program 4 times [2022-04-06 20:06:19,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:19,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364395780] [2022-04-06 20:06:19,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:19,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:20,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:20,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:20,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364395780] [2022-04-06 20:06:20,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364395780] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:20,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609730944] [2022-04-06 20:06:20,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:20,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:20,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:20,029 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 20:06:20,031 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 20:06:20,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:20,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:06:20,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:20,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:20,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609730944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:20,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:20,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 20:06:20,195 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:20,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [900498975] [2022-04-06 20:06:20,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [900498975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:20,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:20,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:06:20,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142951974] [2022-04-06 20:06:20,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:20,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:06:20,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:06:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:06:20,197 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 20:06:20,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:20,261 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-04-06 20:06:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:06:20,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 20:06:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:20,262 INFO L225 Difference]: With dead ends: 30 [2022-04-06 20:06:20,262 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 20:06:20,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:06:20,264 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:20,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 20:06:20,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 20:06:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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 20:06:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-04-06 20:06:20,269 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2022-04-06 20:06:20,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:20,269 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-04-06 20:06:20,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 20:06:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-04-06 20:06:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:06:20,270 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:20,270 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:20,293 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 20:06:20,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:20,484 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1844523035, now seen corresponding path program 5 times [2022-04-06 20:06:20,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:20,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [332872308] [2022-04-06 20:06:20,486 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:20,486 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1844523035, now seen corresponding path program 6 times [2022-04-06 20:06:20,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:20,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935364897] [2022-04-06 20:06:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:20,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:20,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:20,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:20,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935364897] [2022-04-06 20:06:20,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935364897] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:20,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132090940] [2022-04-06 20:06:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:20,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:20,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:20,547 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 20:06:20,552 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 20:06:20,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:06:20,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:06:20,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:20,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:20,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132090940] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:20,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:20,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-04-06 20:06:20,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:20,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [332872308] [2022-04-06 20:06:20,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [332872308] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:20,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:20,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:06:20,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205365917] [2022-04-06 20:06:20,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:20,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:06:20,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:20,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:06:20,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:06:20,780 INFO L87 Difference]: Start difference. First operand 22 states and 23 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 20:06:20,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:20,872 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-04-06 20:06:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:06:20,873 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 20:06:20,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:20,873 INFO L225 Difference]: With dead ends: 32 [2022-04-06 20:06:20,873 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 20:06:20,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=237, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:06:20,874 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:20,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 20:06:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 20:06:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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 20:06:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-04-06 20:06:20,882 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2022-04-06 20:06:20,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:20,882 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-04-06 20:06:20,883 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 20:06:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-04-06 20:06:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:06:20,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:20,884 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:20,911 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 20:06:21,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:21,098 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:21,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1181091774, now seen corresponding path program 7 times [2022-04-06 20:06:21,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:21,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [218708961] [2022-04-06 20:06:21,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:21,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:21,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1181091774, now seen corresponding path program 8 times [2022-04-06 20:06:21,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:21,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997750668] [2022-04-06 20:06:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:21,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:21,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:21,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:21,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997750668] [2022-04-06 20:06:21,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997750668] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:21,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259558127] [2022-04-06 20:06:21,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:21,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:21,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:21,179 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 20:06:21,211 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 20:06:21,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:21,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:06:21,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:21,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:21,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259558127] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:21,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:21,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-04-06 20:06:21,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:21,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [218708961] [2022-04-06 20:06:21,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [218708961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:21,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:21,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:06:21,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178894935] [2022-04-06 20:06:21,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:21,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:06:21,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:21,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:06:21,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:06:21,414 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:21,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:21,518 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-06 20:06:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:06:21,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:06:21,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:21,519 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:06:21,519 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:06:21,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=311, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:06:21,520 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:21,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:06:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 20:06:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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 20:06:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-06 20:06:21,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2022-04-06 20:06:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:21,526 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-06 20:06:21,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-06 20:06:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:06:21,527 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:21,527 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:21,552 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 20:06:21,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:21,747 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:21,748 INFO L85 PathProgramCache]: Analyzing trace with hash 721190239, now seen corresponding path program 9 times [2022-04-06 20:06:21,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:21,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1090285453] [2022-04-06 20:06:21,749 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:21,750 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash 721190239, now seen corresponding path program 10 times [2022-04-06 20:06:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:21,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635466398] [2022-04-06 20:06:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:21,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:21,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:21,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:21,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635466398] [2022-04-06 20:06:21,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635466398] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:21,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247259794] [2022-04-06 20:06:21,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:21,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:21,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:21,840 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 20:06:21,864 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 20:06:21,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:21,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:21,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:06:21,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:21,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:22,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247259794] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:22,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:22,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:06:22,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:22,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1090285453] [2022-04-06 20:06:22,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1090285453] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:22,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:22,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:06:22,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841294120] [2022-04-06 20:06:22,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:22,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:06:22,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:06:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:06:22,066 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:22,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:22,163 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-06 20:06:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:06:22,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:06:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:22,165 INFO L225 Difference]: With dead ends: 36 [2022-04-06 20:06:22,165 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:06:22,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:06:22,168 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:22,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:06:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 20:06:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 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 20:06:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-04-06 20:06:22,179 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2022-04-06 20:06:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:22,181 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-04-06 20:06:22,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-04-06 20:06:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:06:22,183 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:22,183 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:22,207 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 20:06:22,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:22,408 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash -841863364, now seen corresponding path program 11 times [2022-04-06 20:06:22,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:22,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1831646988] [2022-04-06 20:06:22,410 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:22,410 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash -841863364, now seen corresponding path program 12 times [2022-04-06 20:06:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:22,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402077199] [2022-04-06 20:06:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:22,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:22,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:22,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402077199] [2022-04-06 20:06:22,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402077199] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:22,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789497832] [2022-04-06 20:06:22,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:22,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:22,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:22,502 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 20:06:22,528 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 20:06:22,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:06:22,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:22,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:22,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:06:22,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:06:22,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789497832] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:22,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:22,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 15 [2022-04-06 20:06:22,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:22,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1831646988] [2022-04-06 20:06:22,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1831646988] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:22,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:22,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:06:22,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090265612] [2022-04-06 20:06:22,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:22,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:06:22,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:22,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:06:22,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:06:22,671 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 20:06:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:22,769 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-06 20:06:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:06:22,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 20:06:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:22,772 INFO L225 Difference]: With dead ends: 38 [2022-04-06 20:06:22,772 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 20:06:22,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=293, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:06:22,773 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:22,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 20:06:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 20:06:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 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 20:06:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-04-06 20:06:22,788 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2022-04-06 20:06:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:22,788 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-04-06 20:06:22,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 20:06:22,790 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-04-06 20:06:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:06:22,793 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:22,793 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:22,811 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 20:06:22,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:22,994 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash 302177753, now seen corresponding path program 13 times [2022-04-06 20:06:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:22,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1538687969] [2022-04-06 20:06:22,996 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:22,996 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash 302177753, now seen corresponding path program 14 times [2022-04-06 20:06:22,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:22,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796913560] [2022-04-06 20:06:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:22,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:23,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:23,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796913560] [2022-04-06 20:06:23,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796913560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546479047] [2022-04-06 20:06:23,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:23,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:23,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:23,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:06:23,116 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 20:06:23,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:23,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:06:23,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:23,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:23,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546479047] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:23,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:23,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:06:23,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:23,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1538687969] [2022-04-06 20:06:23,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1538687969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:23,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:23,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:06:23,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4579410] [2022-04-06 20:06:23,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:23,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:06:23,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:23,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:06:23,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:06:23,358 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 20:06:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:23,489 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-04-06 20:06:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:06:23,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 20:06:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:23,492 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:06:23,493 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:06:23,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:06:23,494 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:23,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 34 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:23,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:06:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 20:06:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 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 20:06:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-04-06 20:06:23,505 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2022-04-06 20:06:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:23,506 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-04-06 20:06:23,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 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 20:06:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-04-06 20:06:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:06:23,508 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:23,508 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:23,534 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 20:06:23,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 20:06:23,732 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash 214063414, now seen corresponding path program 15 times [2022-04-06 20:06:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2067504637] [2022-04-06 20:06:23,734 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:23,734 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:23,734 INFO L85 PathProgramCache]: Analyzing trace with hash 214063414, now seen corresponding path program 16 times [2022-04-06 20:06:23,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:23,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14753521] [2022-04-06 20:06:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:23,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:23,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:23,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:23,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14753521] [2022-04-06 20:06:23,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14753521] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:23,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549395341] [2022-04-06 20:06:23,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:23,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:23,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:23,847 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 20:06:23,856 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 20:06:23,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:23,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:06:23,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:23,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:24,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549395341] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:24,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:24,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:06:24,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:24,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2067504637] [2022-04-06 20:06:24,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2067504637] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:24,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:24,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:06:24,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554137973] [2022-04-06 20:06:24,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:24,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:06:24,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:24,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:06:24,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:06:24,163 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 20:06:24,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:24,298 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-04-06 20:06:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:06:24,299 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 20:06:24,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:24,299 INFO L225 Difference]: With dead ends: 42 [2022-04-06 20:06:24,299 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 20:06:24,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:06:24,301 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:24,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 20:06:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 20:06:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 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 20:06:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-04-06 20:06:24,306 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2022-04-06 20:06:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:24,306 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-04-06 20:06:24,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 20:06:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-04-06 20:06:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:06:24,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:24,307 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:24,334 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 20:06:24,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:24,531 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:24,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:24,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1435529555, now seen corresponding path program 17 times [2022-04-06 20:06:24,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:24,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [341787822] [2022-04-06 20:06:24,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:24,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:24,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1435529555, now seen corresponding path program 18 times [2022-04-06 20:06:24,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:24,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742942510] [2022-04-06 20:06:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:24,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:24,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:24,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742942510] [2022-04-06 20:06:24,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742942510] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938166859] [2022-04-06 20:06:24,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:24,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:24,656 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 20:06:24,660 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 20:06:24,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:06:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:24,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:06:24,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:06:24,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938166859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:24,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:24,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 4, 4] total 18 [2022-04-06 20:06:24,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:24,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [341787822] [2022-04-06 20:06:24,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [341787822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:24,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:24,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:06:24,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847821653] [2022-04-06 20:06:24,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:24,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:06:24,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:06:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:06:24,817 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 20:06:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:24,972 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-04-06 20:06:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:06:24,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 20:06:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:24,973 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:06:24,973 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:06:24,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=336, Invalid=476, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:06:24,975 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:24,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:06:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 20:06:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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 20:06:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-04-06 20:06:24,990 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2022-04-06 20:06:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:24,990 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-04-06 20:06:24,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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 20:06:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-04-06 20:06:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:06:24,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:24,993 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:25,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 20:06:25,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 20:06:25,212 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1556548048, now seen corresponding path program 19 times [2022-04-06 20:06:25,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:25,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480199212] [2022-04-06 20:06:25,214 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:25,214 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1556548048, now seen corresponding path program 20 times [2022-04-06 20:06:25,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:25,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347146454] [2022-04-06 20:06:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:25,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:25,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:25,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:25,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347146454] [2022-04-06 20:06:25,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347146454] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:25,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426254863] [2022-04-06 20:06:25,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:25,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:25,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:25,359 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 20:06:25,360 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 20:06:25,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:25,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:06:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:25,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:25,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426254863] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:25,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:25,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:06:25,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:25,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480199212] [2022-04-06 20:06:25,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480199212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:25,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:25,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:06:25,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265869074] [2022-04-06 20:06:25,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:25,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:06:25,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:25,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:06:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:06:25,701 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 20:06:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:25,882 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-04-06 20:06:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:06:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 20:06:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:25,883 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:06:25,883 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:06:25,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:06:25,884 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:25,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:06:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 20:06:25,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 20:06:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-04-06 20:06:25,889 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2022-04-06 20:06:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:25,889 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-04-06 20:06:25,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 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 20:06:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-04-06 20:06:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:06:25,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:25,890 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:25,917 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 20:06:26,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:06:26,111 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:26,112 INFO L85 PathProgramCache]: Analyzing trace with hash 684963789, now seen corresponding path program 21 times [2022-04-06 20:06:26,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:26,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1524733701] [2022-04-06 20:06:26,113 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:26,114 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:26,114 INFO L85 PathProgramCache]: Analyzing trace with hash 684963789, now seen corresponding path program 22 times [2022-04-06 20:06:26,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:26,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335750375] [2022-04-06 20:06:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:26,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:26,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:26,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335750375] [2022-04-06 20:06:26,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335750375] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:26,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707351814] [2022-04-06 20:06:26,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:26,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:26,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:26,256 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 20:06:26,287 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 20:06:26,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:26,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:26,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:06:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:26,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:26,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707351814] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:26,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:26,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:06:26,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:26,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1524733701] [2022-04-06 20:06:26,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1524733701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:26,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:26,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:06:26,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230760227] [2022-04-06 20:06:26,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:26,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:06:26,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:26,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:06:26,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:06:26,631 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 20:06:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:26,789 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-04-06 20:06:26,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:06:26,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 20:06:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:26,790 INFO L225 Difference]: With dead ends: 48 [2022-04-06 20:06:26,790 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:06:26,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:06:26,791 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:26,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:06:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 20:06:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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 20:06:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-04-06 20:06:26,796 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2022-04-06 20:06:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:26,796 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-04-06 20:06:26,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 20:06:26,796 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-04-06 20:06:26,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:06:26,797 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:26,797 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:26,815 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 20:06:27,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 20:06:27,004 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:27,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1295743446, now seen corresponding path program 23 times [2022-04-06 20:06:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:27,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219471982] [2022-04-06 20:06:27,006 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:27,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1295743446, now seen corresponding path program 24 times [2022-04-06 20:06:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:27,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261539266] [2022-04-06 20:06:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:27,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:27,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:27,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261539266] [2022-04-06 20:06:27,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261539266] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:27,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83356321] [2022-04-06 20:06:27,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:27,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:27,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:27,153 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 20:06:27,161 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 20:06:27,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:06:27,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:27,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:27,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:06:27,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:06:27,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83356321] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:27,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:27,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 4] total 21 [2022-04-06 20:06:27,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219471982] [2022-04-06 20:06:27,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219471982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:27,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:27,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:06:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400501864] [2022-04-06 20:06:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:27,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:06:27,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:06:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:06:27,351 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 20:06:27,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:27,559 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-04-06 20:06:27,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:06:27,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 20:06:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:27,560 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:06:27,560 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 20:06:27,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=704, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:06:27,561 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:27,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:27,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 20:06:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-06 20:06:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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 20:06:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-04-06 20:06:27,566 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2022-04-06 20:06:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:27,566 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-04-06 20:06:27,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 20:06:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-04-06 20:06:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:06:27,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:27,567 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:27,591 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 20:06:27,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 20:06:27,783 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:27,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2084884153, now seen corresponding path program 25 times [2022-04-06 20:06:27,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:27,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [687130559] [2022-04-06 20:06:27,785 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:27,785 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:27,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2084884153, now seen corresponding path program 26 times [2022-04-06 20:06:27,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:27,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998655199] [2022-04-06 20:06:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:27,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:27,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:27,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:27,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998655199] [2022-04-06 20:06:27,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998655199] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:27,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064239786] [2022-04-06 20:06:27,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:27,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:27,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:27,930 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 20:06:27,932 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 20:06:27,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:27,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:27,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:06:27,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:28,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:28,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064239786] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:28,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:28,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:06:28,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:28,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [687130559] [2022-04-06 20:06:28,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [687130559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:28,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:28,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:06:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674660608] [2022-04-06 20:06:28,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:28,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:06:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:06:28,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:06:28,363 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 20:06:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:28,568 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-04-06 20:06:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:06:28,569 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 20:06:28,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:28,569 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:06:28,569 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 20:06:28,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:06:28,571 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:28,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 29 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 20:06:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 20:06:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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 20:06:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-04-06 20:06:28,575 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2022-04-06 20:06:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:28,575 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-04-06 20:06:28,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 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 20:06:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-04-06 20:06:28,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:06:28,576 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:28,576 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:28,602 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 20:06:28,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:28,796 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:28,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:28,796 INFO L85 PathProgramCache]: Analyzing trace with hash -239892188, now seen corresponding path program 27 times [2022-04-06 20:06:28,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:28,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [596611997] [2022-04-06 20:06:28,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:28,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash -239892188, now seen corresponding path program 28 times [2022-04-06 20:06:28,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:28,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971569015] [2022-04-06 20:06:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:28,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:28,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:28,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:28,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971569015] [2022-04-06 20:06:28,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971569015] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:28,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314563127] [2022-04-06 20:06:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:28,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:28,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:28,964 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 20:06:28,965 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 20:06:29,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:29,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:29,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:06:29,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:29,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:29,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314563127] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:29,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:29,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:06:29,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:29,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [596611997] [2022-04-06 20:06:29,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [596611997] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:29,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:29,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:06:29,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729002177] [2022-04-06 20:06:29,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:29,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:06:29,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:29,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:06:29,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:06:29,477 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 20:06:29,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:29,699 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-04-06 20:06:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:06:29,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 20:06:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:29,700 INFO L225 Difference]: With dead ends: 54 [2022-04-06 20:06:29,700 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 20:06:29,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:06:29,702 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:29,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 39 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 20:06:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 20:06:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 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 20:06:29,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-04-06 20:06:29,706 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2022-04-06 20:06:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:29,706 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-04-06 20:06:29,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 20:06:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-04-06 20:06:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:06:29,707 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:29,707 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:29,738 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 20:06:29,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:06:29,927 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:29,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1024107071, now seen corresponding path program 29 times [2022-04-06 20:06:29,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:29,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [947516829] [2022-04-06 20:06:29,930 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:29,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1024107071, now seen corresponding path program 30 times [2022-04-06 20:06:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:29,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687821494] [2022-04-06 20:06:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:29,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:30,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:30,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:30,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687821494] [2022-04-06 20:06:30,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687821494] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:30,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455250081] [2022-04-06 20:06:30,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:30,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:30,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:30,121 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 20:06:30,122 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 20:06:30,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:06:30,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:30,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:30,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 20:06:30,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-04-06 20:06:30,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455250081] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:30,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:30,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 4, 4] total 24 [2022-04-06 20:06:30,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:30,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [947516829] [2022-04-06 20:06:30,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [947516829] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:30,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:30,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:06:30,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868870555] [2022-04-06 20:06:30,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:30,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:06:30,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:30,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:06:30,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:06:30,334 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 20:06:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:30,568 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-04-06 20:06:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:06:30,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 20:06:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:30,569 INFO L225 Difference]: With dead ends: 56 [2022-04-06 20:06:30,569 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 20:06:30,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=663, Invalid=977, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:06:30,570 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:30,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 20:06:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 20:06:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 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 20:06:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-04-06 20:06:30,576 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2022-04-06 20:06:30,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:30,576 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-04-06 20:06:30,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 20:06:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-04-06 20:06:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:06:30,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:30,577 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:30,607 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 20:06:30,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:30,800 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1259634462, now seen corresponding path program 31 times [2022-04-06 20:06:30,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:30,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1051297039] [2022-04-06 20:06:30,801 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:30,801 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1259634462, now seen corresponding path program 32 times [2022-04-06 20:06:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:30,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390768420] [2022-04-06 20:06:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:30,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:30,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:30,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:30,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390768420] [2022-04-06 20:06:30,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390768420] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:30,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966104197] [2022-04-06 20:06:30,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:30,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:30,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:30,984 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 20:06:30,985 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 20:06:31,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:31,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:31,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:06:31,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:31,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:31,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966104197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:31,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:31,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:06:31,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:31,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1051297039] [2022-04-06 20:06:31,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1051297039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:31,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:31,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:06:31,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895242323] [2022-04-06 20:06:31,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:31,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:06:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:31,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:06:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:06:31,502 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 20:06:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:31,753 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-04-06 20:06:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:06:31,753 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 20:06:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:31,754 INFO L225 Difference]: With dead ends: 58 [2022-04-06 20:06:31,754 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:06:31,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:06:31,756 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:31,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 34 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:06:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-06 20:06:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 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 20:06:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-04-06 20:06:31,772 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2022-04-06 20:06:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:31,773 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-04-06 20:06:31,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 20:06:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-04-06 20:06:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:06:31,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:31,773 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:31,800 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 20:06:31,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:31,987 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:31,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:31,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1206959419, now seen corresponding path program 33 times [2022-04-06 20:06:31,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:31,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335783024] [2022-04-06 20:06:31,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:31,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:31,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1206959419, now seen corresponding path program 34 times [2022-04-06 20:06:31,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:31,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907976179] [2022-04-06 20:06:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:31,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:32,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:32,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:32,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907976179] [2022-04-06 20:06:32,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907976179] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:32,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832713893] [2022-04-06 20:06:32,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:32,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:32,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:32,188 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 20:06:32,190 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 20:06:32,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:32,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:32,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:06:32,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:32,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:32,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832713893] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:32,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:32,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:06:32,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:32,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335783024] [2022-04-06 20:06:32,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335783024] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:32,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:32,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:06:32,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138649509] [2022-04-06 20:06:32,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:32,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:06:32,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:32,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:06:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:06:32,735 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 20:06:32,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:32,994 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2022-04-06 20:06:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:06:32,995 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 20:06:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:32,995 INFO L225 Difference]: With dead ends: 60 [2022-04-06 20:06:32,996 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:06:32,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:06:32,997 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:32,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 49 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:06:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 20:06:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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 20:06:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-04-06 20:06:33,002 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2022-04-06 20:06:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:33,002 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-04-06 20:06:33,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 20:06:33,002 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-04-06 20:06:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:06:33,003 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:33,003 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:33,031 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 20:06:33,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:33,219 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2125850648, now seen corresponding path program 35 times [2022-04-06 20:06:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:33,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922935031] [2022-04-06 20:06:33,221 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:33,221 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2125850648, now seen corresponding path program 36 times [2022-04-06 20:06:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:33,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418357946] [2022-04-06 20:06:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:33,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:33,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:33,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:33,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418357946] [2022-04-06 20:06:33,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418357946] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:33,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976474644] [2022-04-06 20:06:33,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:33,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:33,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:33,434 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 20:06:33,436 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 20:06:33,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:06:33,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-04-06 20:06:33,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 57 proven. 1 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-04-06 20:06:33,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976474644] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:33,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:33,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 4, 4] total 27 [2022-04-06 20:06:33,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:33,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922935031] [2022-04-06 20:06:33,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922935031] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:33,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:33,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:06:33,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802250402] [2022-04-06 20:06:33,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:33,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:06:33,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:33,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:06:33,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:06:33,663 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 20:06:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:33,918 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-04-06 20:06:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:06:33,920 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 20:06:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:33,920 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:06:33,920 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 20:06:33,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=867, Invalid=1295, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:06:33,921 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:33,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:06:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 20:06:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 20:06:33,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 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 20:06:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-04-06 20:06:33,925 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2022-04-06 20:06:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:33,925 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-04-06 20:06:33,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 20:06:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-04-06 20:06:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:06:33,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:33,926 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:33,941 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 20:06:34,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:34,126 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:34,127 INFO L85 PathProgramCache]: Analyzing trace with hash 417058741, now seen corresponding path program 37 times [2022-04-06 20:06:34,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:34,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1551828637] [2022-04-06 20:06:34,129 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:34,129 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash 417058741, now seen corresponding path program 38 times [2022-04-06 20:06:34,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:34,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326182318] [2022-04-06 20:06:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:34,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:34,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:34,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326182318] [2022-04-06 20:06:34,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326182318] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822343863] [2022-04-06 20:06:34,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:34,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:34,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:34,346 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 20:06:34,347 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 20:06:34,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:34,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:34,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:06:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:34,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:34,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822343863] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:34,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:34,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:06:34,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:34,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1551828637] [2022-04-06 20:06:34,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1551828637] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:34,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:34,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:06:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252493253] [2022-04-06 20:06:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:34,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:06:34,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:06:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:06:34,981 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 20:06:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:35,255 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-04-06 20:06:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:06:35,256 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 20:06:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:35,256 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:06:35,256 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 20:06:35,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:06:35,258 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:35,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 34 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 20:06:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 20:06:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 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 20:06:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-04-06 20:06:35,262 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2022-04-06 20:06:35,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:35,262 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-04-06 20:06:35,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 20:06:35,262 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-04-06 20:06:35,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:06:35,263 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:35,263 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:35,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-06 20:06:35,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 20:06:35,471 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1054456814, now seen corresponding path program 39 times [2022-04-06 20:06:35,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:35,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1403405053] [2022-04-06 20:06:35,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:35,473 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:35,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1054456814, now seen corresponding path program 40 times [2022-04-06 20:06:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:35,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471044492] [2022-04-06 20:06:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:35,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:35,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:35,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:35,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471044492] [2022-04-06 20:06:35,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471044492] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:35,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280632623] [2022-04-06 20:06:35,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:35,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:35,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:35,690 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 20:06:35,691 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 20:06:35,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:35,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:35,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:06:35,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:35,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:36,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280632623] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:36,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:36,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:06:36,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:36,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1403405053] [2022-04-06 20:06:36,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1403405053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:36,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:36,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:06:36,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370192606] [2022-04-06 20:06:36,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:36,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:06:36,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:36,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:06:36,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:06:36,376 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 20:06:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:36,680 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-04-06 20:06:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:06:36,681 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 20:06:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:36,681 INFO L225 Difference]: With dead ends: 66 [2022-04-06 20:06:36,681 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:06:36,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:06:36,683 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:36,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 24 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:06:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 20:06:36,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 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 20:06:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-04-06 20:06:36,687 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2022-04-06 20:06:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:36,687 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-04-06 20:06:36,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 20:06:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-04-06 20:06:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:06:36,688 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:36,688 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:36,707 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 20:06:36,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-04-06 20:06:36,899 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:36,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2136664785, now seen corresponding path program 41 times [2022-04-06 20:06:36,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:36,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1144640604] [2022-04-06 20:06:36,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:36,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:36,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2136664785, now seen corresponding path program 42 times [2022-04-06 20:06:36,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:36,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682617216] [2022-04-06 20:06:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:36,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:37,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:37,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:37,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682617216] [2022-04-06 20:06:37,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682617216] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:37,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306967441] [2022-04-06 20:06:37,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:37,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:37,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:37,140 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 20:06:37,142 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 20:06:37,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:06:37,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:37,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-04-06 20:06:37,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-04-06 20:06:37,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306967441] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:37,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:37,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 4, 4] total 30 [2022-04-06 20:06:37,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:37,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1144640604] [2022-04-06 20:06:37,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1144640604] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:37,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:37,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:06:37,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833459115] [2022-04-06 20:06:37,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:37,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:06:37,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:37,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:06:37,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:06:37,363 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 20:06:37,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:37,707 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-04-06 20:06:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:06:37,708 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 20:06:37,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:37,708 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:06:37,708 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 20:06:37,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1098, Invalid=1658, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:06:37,709 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:37,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 54 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:37,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 20:06:37,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-04-06 20:06:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 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 20:06:37,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-04-06 20:06:37,713 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2022-04-06 20:06:37,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:37,713 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-04-06 20:06:37,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 20:06:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-04-06 20:06:37,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:06:37,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:37,714 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:37,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 20:06:37,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:37,915 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1538528012, now seen corresponding path program 43 times [2022-04-06 20:06:37,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:37,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [762758911] [2022-04-06 20:06:37,917 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:37,917 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1538528012, now seen corresponding path program 44 times [2022-04-06 20:06:37,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:37,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411337124] [2022-04-06 20:06:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:38,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:38,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:38,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411337124] [2022-04-06 20:06:38,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411337124] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:38,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306193657] [2022-04-06 20:06:38,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:38,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:38,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:38,167 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 20:06:38,168 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 20:06:38,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:38,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:06:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:38,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:38,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306193657] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:38,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:38,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:06:38,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:38,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [762758911] [2022-04-06 20:06:38,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [762758911] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:38,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:38,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:06:38,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573332166] [2022-04-06 20:06:38,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:38,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:06:38,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:38,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:06:38,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:06:38,933 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2022-04-06 20:06:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:39,275 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-04-06 20:06:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:06:39,276 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) Word has length 59 [2022-04-06 20:06:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:39,276 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:06:39,276 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:06:39,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:06:39,279 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:39,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 39 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:06:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-04-06 20:06:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 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 20:06:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-04-06 20:06:39,283 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2022-04-06 20:06:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:39,283 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-04-06 20:06:39,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2022-04-06 20:06:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-04-06 20:06:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:06:39,284 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:39,284 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:39,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 20:06:39,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:39,506 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:39,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1359278679, now seen corresponding path program 45 times [2022-04-06 20:06:39,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:39,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [703286849] [2022-04-06 20:06:39,508 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:39,508 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1359278679, now seen corresponding path program 46 times [2022-04-06 20:06:39,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:39,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719540897] [2022-04-06 20:06:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:39,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:39,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:39,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:39,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719540897] [2022-04-06 20:06:39,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719540897] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:39,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541769177] [2022-04-06 20:06:39,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:39,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:39,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:39,797 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 20:06:39,797 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 20:06:39,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:39,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:39,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:06:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:39,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:40,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541769177] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:40,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:40,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:06:40,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:40,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [703286849] [2022-04-06 20:06:40,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [703286849] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:40,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:40,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:06:40,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140257848] [2022-04-06 20:06:40,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:40,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:06:40,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:06:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:06:40,640 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:40,998 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-04-06 20:06:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:06:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 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 61 [2022-04-06 20:06:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:40,999 INFO L225 Difference]: With dead ends: 72 [2022-04-06 20:06:40,999 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 20:06:41,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:06:41,000 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:41,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 34 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 20:06:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-04-06 20:06:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 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 20:06:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-04-06 20:06:41,003 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2022-04-06 20:06:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:41,004 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-04-06 20:06:41,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-04-06 20:06:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:06:41,004 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:41,004 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:41,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 20:06:41,211 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,SelfDestructingSolverStorable26 [2022-04-06 20:06:41,211 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1282266374, now seen corresponding path program 47 times [2022-04-06 20:06:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:41,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [448139193] [2022-04-06 20:06:41,213 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:41,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1282266374, now seen corresponding path program 48 times [2022-04-06 20:06:41,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:41,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335456815] [2022-04-06 20:06:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:41,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:41,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:41,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:41,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335456815] [2022-04-06 20:06:41,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335456815] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:41,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939087126] [2022-04-06 20:06:41,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:41,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:41,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:41,522 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 20:06:41,552 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 20:06:41,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:06:41,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:41,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:41,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-04-06 20:06:41,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-04-06 20:06:41,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939087126] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:41,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:41,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4] total 33 [2022-04-06 20:06:41,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:41,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [448139193] [2022-04-06 20:06:41,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [448139193] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:41,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:41,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:06:41,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147976048] [2022-04-06 20:06:41,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:41,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:06:41,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:06:41,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:06:41,774 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:42,206 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-04-06 20:06:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:06:42,206 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 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 63 [2022-04-06 20:06:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:42,207 INFO L225 Difference]: With dead ends: 74 [2022-04-06 20:06:42,207 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 20:06:42,207 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1356, Invalid=2066, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:06:42,208 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:42,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 44 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 20:06:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-04-06 20:06:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 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 20:06:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-04-06 20:06:42,211 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2022-04-06 20:06:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:42,211 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-04-06 20:06:42,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-04-06 20:06:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:06:42,211 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:42,211 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:42,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 20:06:42,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:06:42,412 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:42,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1481390371, now seen corresponding path program 49 times [2022-04-06 20:06:42,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:42,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [518702341] [2022-04-06 20:06:42,414 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:42,414 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:42,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1481390371, now seen corresponding path program 50 times [2022-04-06 20:06:42,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:42,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798400566] [2022-04-06 20:06:42,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:42,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:42,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:42,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:42,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798400566] [2022-04-06 20:06:42,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798400566] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:42,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168985900] [2022-04-06 20:06:42,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:42,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:42,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:42,755 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 20:06:42,782 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 20:06:42,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:42,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:06:42,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:42,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:43,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168985900] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:43,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:43,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 54 [2022-04-06 20:06:43,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:43,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [518702341] [2022-04-06 20:06:43,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [518702341] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:43,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:43,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:06:43,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046668190] [2022-04-06 20:06:43,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:43,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:06:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:43,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:06:43,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:06:43,634 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:44,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:44,042 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2022-04-06 20:06:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:06:44,042 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 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 65 [2022-04-06 20:06:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:44,043 INFO L225 Difference]: With dead ends: 76 [2022-04-06 20:06:44,043 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 20:06:44,044 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2812, Invalid=3668, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:06:44,044 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:44,045 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 34 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 20:06:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-04-06 20:06:44,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 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 20:06:44,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-04-06 20:06:44,049 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2022-04-06 20:06:44,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:44,049 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-04-06 20:06:44,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-04-06 20:06:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:06:44,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:44,050 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:44,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 20:06:44,255 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,SelfDestructingSolverStorable28 [2022-04-06 20:06:44,255 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash -433976832, now seen corresponding path program 51 times [2022-04-06 20:06:44,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:44,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [562832934] [2022-04-06 20:06:44,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:44,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash -433976832, now seen corresponding path program 52 times [2022-04-06 20:06:44,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:44,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409594678] [2022-04-06 20:06:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:44,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:44,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:44,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:44,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409594678] [2022-04-06 20:06:44,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409594678] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:44,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646725353] [2022-04-06 20:06:44,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:44,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:44,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:44,666 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 20:06:44,668 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 20:06:44,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:44,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:06:44,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:44,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:45,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646725353] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:45,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:45,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 54 [2022-04-06 20:06:45,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:45,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [562832934] [2022-04-06 20:06:45,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [562832934] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:45,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:45,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:06:45,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647524585] [2022-04-06 20:06:45,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:45,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:06:45,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:06:45,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:06:45,625 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:46,096 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2022-04-06 20:06:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:06:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 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 67 [2022-04-06 20:06:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:46,097 INFO L225 Difference]: With dead ends: 78 [2022-04-06 20:06:46,097 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:06:46,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2865, Invalid=3777, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:06:46,099 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:46,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:06:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 20:06:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 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 20:06:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-04-06 20:06:46,103 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2022-04-06 20:06:46,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:46,103 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-04-06 20:06:46,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:46,103 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-04-06 20:06:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:06:46,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:46,104 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:46,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 20:06:46,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:46,319 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:46,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1439111069, now seen corresponding path program 53 times [2022-04-06 20:06:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:46,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1846460990] [2022-04-06 20:06:46,321 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:46,321 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1439111069, now seen corresponding path program 54 times [2022-04-06 20:06:46,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:46,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522502982] [2022-04-06 20:06:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:46,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:46,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:46,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522502982] [2022-04-06 20:06:46,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522502982] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366536948] [2022-04-06 20:06:46,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:46,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:46,723 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 20:06:46,724 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 20:06:46,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:06:46,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:46,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:46,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-04-06 20:06:46,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2022-04-06 20:06:47,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366536948] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:47,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:47,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 4, 4] total 36 [2022-04-06 20:06:47,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:47,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1846460990] [2022-04-06 20:06:47,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1846460990] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:47,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:47,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:06:47,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908522188] [2022-04-06 20:06:47,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:47,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:06:47,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:06:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:06:47,025 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:47,524 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2022-04-06 20:06:47,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:06:47,524 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 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 69 [2022-04-06 20:06:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:47,525 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:06:47,525 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:06:47,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1641, Invalid=2519, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:06:47,526 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:47,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 49 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:06:47,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-04-06 20:06:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 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 20:06:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-04-06 20:06:47,530 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2022-04-06 20:06:47,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:47,531 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-04-06 20:06:47,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-04-06 20:06:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:06:47,531 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:47,531 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:47,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 20:06:47,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:47,735 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1885286906, now seen corresponding path program 55 times [2022-04-06 20:06:47,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:47,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1218523751] [2022-04-06 20:06:47,737 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:47,737 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1885286906, now seen corresponding path program 56 times [2022-04-06 20:06:47,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:47,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992120615] [2022-04-06 20:06:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:47,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:48,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:48,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:48,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992120615] [2022-04-06 20:06:48,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992120615] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:48,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527089635] [2022-04-06 20:06:48,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:48,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:48,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:48,093 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 20:06:48,093 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 20:06:48,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:48,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:48,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:06:48,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:48,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:48,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527089635] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:48,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:48,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 54 [2022-04-06 20:06:48,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:48,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1218523751] [2022-04-06 20:06:48,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1218523751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:48,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:48,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:06:48,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697710433] [2022-04-06 20:06:48,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:48,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:06:48,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:48,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:06:48,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:06:48,885 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:49,379 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-04-06 20:06:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:06:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 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 71 [2022-04-06 20:06:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:49,380 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:06:49,380 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 20:06:49,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2971, Invalid=4001, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:06:49,381 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:49,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 54 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 20:06:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-06 20:06:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 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 20:06:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-04-06 20:06:49,385 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2022-04-06 20:06:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:49,386 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-04-06 20:06:49,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-04-06 20:06:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 20:06:49,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:49,386 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:49,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 20:06:49,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:49,591 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1163536663, now seen corresponding path program 57 times [2022-04-06 20:06:49,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:49,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1235995196] [2022-04-06 20:06:49,593 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:49,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1163536663, now seen corresponding path program 58 times [2022-04-06 20:06:49,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:49,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271824965] [2022-04-06 20:06:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:49,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:49,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:49,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:49,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271824965] [2022-04-06 20:06:49,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271824965] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:49,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200560586] [2022-04-06 20:06:49,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:49,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:49,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:49,985 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 20:06:49,986 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 20:06:50,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:50,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:50,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:06:50,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:50,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:50,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200560586] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:50,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:50,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 54 [2022-04-06 20:06:50,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1235995196] [2022-04-06 20:06:50,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1235995196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:50,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:50,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:06:50,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750851621] [2022-04-06 20:06:50,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:50,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:06:50,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:06:50,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:06:50,788 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:51,375 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2022-04-06 20:06:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:06:51,376 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 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 73 [2022-04-06 20:06:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:51,376 INFO L225 Difference]: With dead ends: 84 [2022-04-06 20:06:51,376 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 20:06:51,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3024, Invalid=4116, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:06:51,377 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:51,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:51,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 20:06:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-04-06 20:06:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 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 20:06:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-04-06 20:06:51,382 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2022-04-06 20:06:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:51,382 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-04-06 20:06:51,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:51,382 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-04-06 20:06:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 20:06:51,383 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:51,383 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:51,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 20:06:51,583 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,SelfDestructingSolverStorable32 [2022-04-06 20:06:51,583 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:51,584 INFO L85 PathProgramCache]: Analyzing trace with hash -948712204, now seen corresponding path program 59 times [2022-04-06 20:06:51,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:51,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [522292966] [2022-04-06 20:06:51,585 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:51,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash -948712204, now seen corresponding path program 60 times [2022-04-06 20:06:51,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:51,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328504468] [2022-04-06 20:06:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:51,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:52,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:52,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:52,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328504468] [2022-04-06 20:06:52,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328504468] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:52,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034648725] [2022-04-06 20:06:52,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:52,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:52,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:52,014 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 20:06:52,014 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 20:06:52,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:06:52,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:52,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:52,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 93 proven. 1 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-04-06 20:06:52,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 93 proven. 1 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-04-06 20:06:52,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034648725] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:52,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:52,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 4, 4] total 39 [2022-04-06 20:06:52,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:52,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [522292966] [2022-04-06 20:06:52,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [522292966] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:52,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:52,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:06:52,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821482527] [2022-04-06 20:06:52,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:52,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:06:52,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:06:52,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:06:52,279 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:52,817 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2022-04-06 20:06:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:06:52,817 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 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 75 [2022-04-06 20:06:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:52,817 INFO L225 Difference]: With dead ends: 86 [2022-04-06 20:06:52,818 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 20:06:52,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1953, Invalid=3017, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:06:52,819 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:52,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:52,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 20:06:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-04-06 20:06:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 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 20:06:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-04-06 20:06:52,822 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2022-04-06 20:06:52,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:52,823 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-04-06 20:06:52,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-04-06 20:06:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:06:52,823 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:52,823 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:52,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 20:06:53,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:53,024 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash 699657617, now seen corresponding path program 61 times [2022-04-06 20:06:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:53,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1307450330] [2022-04-06 20:06:53,026 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:53,026 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:53,026 INFO L85 PathProgramCache]: Analyzing trace with hash 699657617, now seen corresponding path program 62 times [2022-04-06 20:06:53,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:53,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892992130] [2022-04-06 20:06:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:53,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:53,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:53,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:53,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892992130] [2022-04-06 20:06:53,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892992130] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:53,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809289005] [2022-04-06 20:06:53,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:53,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:53,479 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 20:06:53,480 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 20:06:53,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:53,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:53,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:06:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:53,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:54,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809289005] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:54,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:54,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2022-04-06 20:06:54,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:54,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1307450330] [2022-04-06 20:06:54,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1307450330] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:54,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:54,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:06:54,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612030100] [2022-04-06 20:06:54,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:54,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:06:54,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:54,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:06:54,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:06:54,328 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:54,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:54,932 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-04-06 20:06:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:06:54,932 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 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 77 [2022-04-06 20:06:54,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:54,933 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:06:54,933 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:06:54,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3130, Invalid=4352, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:06:54,934 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:54,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 34 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:06:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-04-06 20:06:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 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 20:06:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-04-06 20:06:54,938 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2022-04-06 20:06:54,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:54,938 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-04-06 20:06:54,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-04-06 20:06:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 20:06:54,939 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:54,939 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:54,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 20:06:55,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:55,147 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:55,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:55,148 INFO L85 PathProgramCache]: Analyzing trace with hash -59876626, now seen corresponding path program 63 times [2022-04-06 20:06:55,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:55,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [479787350] [2022-04-06 20:06:55,149 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:55,149 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:55,149 INFO L85 PathProgramCache]: Analyzing trace with hash -59876626, now seen corresponding path program 64 times [2022-04-06 20:06:55,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:55,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275762824] [2022-04-06 20:06:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:55,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:55,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:55,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275762824] [2022-04-06 20:06:55,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275762824] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363935791] [2022-04-06 20:06:55,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:06:55,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:55,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:55,608 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 20:06:55,635 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 20:06:55,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:06:55,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:55,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:06:55,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:55,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:56,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363935791] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:56,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:56,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 54 [2022-04-06 20:06:56,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:56,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [479787350] [2022-04-06 20:06:56,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [479787350] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:56,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:56,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:06:56,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225883249] [2022-04-06 20:06:56,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:56,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:06:56,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:56,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:06:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:06:56,338 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:56,924 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2022-04-06 20:06:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:06:56,924 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 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 79 [2022-04-06 20:06:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:56,925 INFO L225 Difference]: With dead ends: 90 [2022-04-06 20:06:56,925 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 20:06:56,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3183, Invalid=4473, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:06:56,926 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:56,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 20:06:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-06 20:06:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 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 20:06:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-04-06 20:06:56,931 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2022-04-06 20:06:56,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:56,932 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-04-06 20:06:56,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:56,932 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-04-06 20:06:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 20:06:56,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:56,932 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:56,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 20:06:57,143 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,SelfDestructingSolverStorable35 [2022-04-06 20:06:57,143 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:57,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash 172156171, now seen corresponding path program 65 times [2022-04-06 20:06:57,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:57,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1447044499] [2022-04-06 20:06:57,145 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:57,145 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:57,145 INFO L85 PathProgramCache]: Analyzing trace with hash 172156171, now seen corresponding path program 66 times [2022-04-06 20:06:57,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:57,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473188061] [2022-04-06 20:06:57,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:57,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:57,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:57,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:57,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473188061] [2022-04-06 20:06:57,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473188061] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:57,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110407197] [2022-04-06 20:06:57,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:06:57,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:57,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:57,633 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 20:06:57,634 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 20:06:57,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:06:57,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:57,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:06:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 102 proven. 1 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2022-04-06 20:06:57,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 102 proven. 1 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2022-04-06 20:06:57,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110407197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:57,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:57,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 4, 4] total 42 [2022-04-06 20:06:57,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:57,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1447044499] [2022-04-06 20:06:57,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1447044499] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:57,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:57,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:06:57,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435816186] [2022-04-06 20:06:57,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:57,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:06:57,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:57,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:06:57,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:06:57,922 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:58,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:06:58,532 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-04-06 20:06:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:06:58,533 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 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 81 [2022-04-06 20:06:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:06:58,533 INFO L225 Difference]: With dead ends: 92 [2022-04-06 20:06:58,533 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 20:06:58,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2292, Invalid=3560, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:06:58,534 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:06:58,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:06:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 20:06:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 20:06:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 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 20:06:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-04-06 20:06:58,539 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2022-04-06 20:06:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:06:58,539 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-04-06 20:06:58,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:06:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-04-06 20:06:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:06:58,540 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:06:58,540 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:06:58,563 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 20:06:58,751 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,SelfDestructingSolverStorable36 [2022-04-06 20:06:58,751 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:06:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:06:58,752 INFO L85 PathProgramCache]: Analyzing trace with hash -182625304, now seen corresponding path program 67 times [2022-04-06 20:06:58,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:58,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1239120045] [2022-04-06 20:06:58,753 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:06:58,754 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:06:58,754 INFO L85 PathProgramCache]: Analyzing trace with hash -182625304, now seen corresponding path program 68 times [2022-04-06 20:06:58,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:06:58,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222668159] [2022-04-06 20:06:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:06:58,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:06:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:59,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:06:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:06:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:59,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:06:59,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222668159] [2022-04-06 20:06:59,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222668159] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:06:59,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341095433] [2022-04-06 20:06:59,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:06:59,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:06:59,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:06:59,255 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 20:06:59,264 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 20:06:59,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:06:59,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:06:59,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:06:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:06:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:59,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:06:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:06:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341095433] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:06:59,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:06:59,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 54 [2022-04-06 20:06:59,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:06:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1239120045] [2022-04-06 20:06:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1239120045] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:06:59,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:06:59,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:06:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660760736] [2022-04-06 20:06:59,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:06:59,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:06:59,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:06:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:06:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:06:59,952 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:00,589 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-04-06 20:07:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:07:00,589 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2022-04-06 20:07:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:00,589 INFO L225 Difference]: With dead ends: 94 [2022-04-06 20:07:00,589 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:07:00,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3289, Invalid=4721, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:07:00,591 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:00,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:00,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:07:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-06 20:07:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 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 20:07:00,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-04-06 20:07:00,596 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 83 [2022-04-06 20:07:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:00,596 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-04-06 20:07:00,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-04-06 20:07:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 20:07:00,597 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:00,597 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:00,614 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 20:07:00,799 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,SelfDestructingSolverStorable37 [2022-04-06 20:07:00,799 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1825206395, now seen corresponding path program 69 times [2022-04-06 20:07:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:00,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1347722506] [2022-04-06 20:07:00,801 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:00,801 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1825206395, now seen corresponding path program 70 times [2022-04-06 20:07:00,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:00,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685510042] [2022-04-06 20:07:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:00,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:01,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:01,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:01,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685510042] [2022-04-06 20:07:01,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685510042] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:01,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632985502] [2022-04-06 20:07:01,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:01,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:01,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:01,324 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 20:07:01,326 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 20:07:01,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:01,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:07:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:01,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:02,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632985502] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:02,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:02,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 54 [2022-04-06 20:07:02,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:02,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1347722506] [2022-04-06 20:07:02,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1347722506] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:02,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:02,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:07:02,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097887899] [2022-04-06 20:07:02,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:02,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:07:02,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:07:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:07:02,018 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:02,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:02,687 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-04-06 20:07:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:07:02,687 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 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 85 [2022-04-06 20:07:02,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:02,688 INFO L225 Difference]: With dead ends: 96 [2022-04-06 20:07:02,688 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 20:07:02,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3342, Invalid=4848, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:07:02,689 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:02,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 44 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 20:07:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-04-06 20:07:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 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 20:07:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-04-06 20:07:02,694 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2022-04-06 20:07:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:02,694 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-04-06 20:07:02,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-04-06 20:07:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 20:07:02,695 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:02,695 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:02,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 20:07:02,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:07:02,903 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash 202330082, now seen corresponding path program 71 times [2022-04-06 20:07:02,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:02,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [227448805] [2022-04-06 20:07:02,906 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:02,906 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash 202330082, now seen corresponding path program 72 times [2022-04-06 20:07:02,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:02,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909563209] [2022-04-06 20:07:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:03,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:03,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:03,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909563209] [2022-04-06 20:07:03,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909563209] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:03,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924046317] [2022-04-06 20:07:03,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:03,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:03,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:03,477 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 20:07:03,478 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 20:07:03,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:07:03,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:03,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:03,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-04-06 20:07:03,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-04-06 20:07:03,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924046317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:03,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:03,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 4, 4] total 45 [2022-04-06 20:07:03,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [227448805] [2022-04-06 20:07:03,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [227448805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:03,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:03,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:07:03,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197590124] [2022-04-06 20:07:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:03,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:07:03,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:03,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:07:03,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:07:03,800 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:04,502 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-04-06 20:07:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:07:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 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 87 [2022-04-06 20:07:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:04,503 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:07:04,503 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 20:07:04,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2658, Invalid=4148, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:07:04,504 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:04,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 24 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 20:07:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-06 20:07:04,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 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 20:07:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-04-06 20:07:04,509 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2022-04-06 20:07:04,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:04,509 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-04-06 20:07:04,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-04-06 20:07:04,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:07:04,510 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:04,510 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:04,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 20:07:04,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:07:04,723 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:04,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1250267905, now seen corresponding path program 73 times [2022-04-06 20:07:04,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:04,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1611119214] [2022-04-06 20:07:04,725 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:04,725 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:04,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1250267905, now seen corresponding path program 74 times [2022-04-06 20:07:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:04,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586209168] [2022-04-06 20:07:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:04,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:05,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586209168] [2022-04-06 20:07:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586209168] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503696415] [2022-04-06 20:07:05,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:05,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:05,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:05,292 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 20:07:05,293 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 20:07:05,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:05,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:05,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:07:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:05,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:05,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503696415] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:05,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:05,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 54 [2022-04-06 20:07:05,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1611119214] [2022-04-06 20:07:05,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1611119214] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:05,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:05,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:07:05,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031286161] [2022-04-06 20:07:05,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:05,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:07:05,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:05,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:07:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:07:05,969 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:06,661 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2022-04-06 20:07:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:07:06,661 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 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 89 [2022-04-06 20:07:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:06,662 INFO L225 Difference]: With dead ends: 100 [2022-04-06 20:07:06,662 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:07:06,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3448, Invalid=5108, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:07:06,663 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:06,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:06,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:07:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-04-06 20:07:06,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 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 20:07:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-04-06 20:07:06,667 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2022-04-06 20:07:06,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:06,667 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-04-06 20:07:06,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-04-06 20:07:06,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 20:07:06,668 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:06,668 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:06,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 20:07:06,868 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,SelfDestructingSolverStorable40 [2022-04-06 20:07:06,868 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1332562212, now seen corresponding path program 75 times [2022-04-06 20:07:06,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:06,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327435030] [2022-04-06 20:07:06,870 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:06,870 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:06,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1332562212, now seen corresponding path program 76 times [2022-04-06 20:07:06,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:06,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681285207] [2022-04-06 20:07:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:06,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:07,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:07,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681285207] [2022-04-06 20:07:07,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681285207] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089266334] [2022-04-06 20:07:07,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:07,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:07,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:07,512 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 20:07:07,512 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 20:07:07,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:07,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:07:07,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:07,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:08,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089266334] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:08,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:08,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 54 [2022-04-06 20:07:08,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:08,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327435030] [2022-04-06 20:07:08,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327435030] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:08,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:08,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:07:08,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753359022] [2022-04-06 20:07:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:08,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:07:08,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:07:08,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:07:08,150 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:08,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:08,873 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2022-04-06 20:07:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:07:08,873 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 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 91 [2022-04-06 20:07:08,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:08,873 INFO L225 Difference]: With dead ends: 102 [2022-04-06 20:07:08,874 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 20:07:08,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3501, Invalid=5241, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:07:08,874 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:08,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 34 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 20:07:08,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-04-06 20:07:08,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 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 20:07:08,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-04-06 20:07:08,878 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 91 [2022-04-06 20:07:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:08,879 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-04-06 20:07:08,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-04-06 20:07:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 20:07:08,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:08,879 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:08,897 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 20:07:09,087 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,SelfDestructingSolverStorable41 [2022-04-06 20:07:09,087 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:09,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1186987385, now seen corresponding path program 77 times [2022-04-06 20:07:09,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:09,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063674263] [2022-04-06 20:07:09,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:09,090 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1186987385, now seen corresponding path program 78 times [2022-04-06 20:07:09,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:09,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079288835] [2022-04-06 20:07:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:09,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:09,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:09,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:09,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079288835] [2022-04-06 20:07:09,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079288835] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:09,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253330841] [2022-04-06 20:07:09,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:09,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:09,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:09,734 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 20:07:09,736 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 20:07:09,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:07:09,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:09,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 120 proven. 1 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2022-04-06 20:07:09,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 120 proven. 1 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2022-04-06 20:07:10,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253330841] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:10,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:10,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 4, 4] total 48 [2022-04-06 20:07:10,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:10,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063674263] [2022-04-06 20:07:10,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063674263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:10,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:10,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:07:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716294712] [2022-04-06 20:07:10,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:10,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:07:10,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:07:10,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:07:10,062 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:10,890 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2022-04-06 20:07:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:07:10,891 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 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 93 [2022-04-06 20:07:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:10,891 INFO L225 Difference]: With dead ends: 104 [2022-04-06 20:07:10,891 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 20:07:10,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3051, Invalid=4781, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:07:10,892 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:10,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 39 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 20:07:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-04-06 20:07:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 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 20:07:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-04-06 20:07:10,898 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2022-04-06 20:07:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:10,898 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-04-06 20:07:10,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-04-06 20:07:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:07:10,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:10,899 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:10,920 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 20:07:11,115 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,SelfDestructingSolverStorable42 [2022-04-06 20:07:11,116 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:11,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:11,116 INFO L85 PathProgramCache]: Analyzing trace with hash 112595158, now seen corresponding path program 79 times [2022-04-06 20:07:11,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:11,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1265355653] [2022-04-06 20:07:11,118 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:11,118 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:11,118 INFO L85 PathProgramCache]: Analyzing trace with hash 112595158, now seen corresponding path program 80 times [2022-04-06 20:07:11,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:11,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070839824] [2022-04-06 20:07:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:11,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:11,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:11,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:11,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070839824] [2022-04-06 20:07:11,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070839824] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:11,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012776648] [2022-04-06 20:07:11,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:11,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:11,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:11,814 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 20:07:11,815 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 20:07:11,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:11,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:11,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:07:11,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:12,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:12,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012776648] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:12,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:12,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 54 [2022-04-06 20:07:12,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:12,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1265355653] [2022-04-06 20:07:12,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1265355653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:12,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:12,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:07:12,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942682681] [2022-04-06 20:07:12,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:12,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:07:12,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:12,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:07:12,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:07:12,423 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:13,219 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-04-06 20:07:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:07:13,220 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 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 95 [2022-04-06 20:07:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:13,220 INFO L225 Difference]: With dead ends: 106 [2022-04-06 20:07:13,220 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 20:07:13,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3607, Invalid=5513, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:07:13,222 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:13,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 39 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 20:07:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-04-06 20:07:13,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 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 20:07:13,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-04-06 20:07:13,227 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2022-04-06 20:07:13,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:13,227 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-04-06 20:07:13,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-04-06 20:07:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 20:07:13,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:13,228 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:13,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 20:07:13,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:13,441 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1586183949, now seen corresponding path program 81 times [2022-04-06 20:07:13,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:13,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [854832418] [2022-04-06 20:07:13,443 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:13,443 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:13,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1586183949, now seen corresponding path program 82 times [2022-04-06 20:07:13,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:13,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614817296] [2022-04-06 20:07:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:13,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:14,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:14,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:14,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614817296] [2022-04-06 20:07:14,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614817296] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:14,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439485095] [2022-04-06 20:07:14,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:14,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:14,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:14,120 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 20:07:14,129 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 20:07:14,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:14,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:14,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:07:14,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:14,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:14,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439485095] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:14,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:14,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 54 [2022-04-06 20:07:14,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:14,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [854832418] [2022-04-06 20:07:14,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [854832418] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:14,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:14,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:07:14,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482866820] [2022-04-06 20:07:14,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:14,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:07:14,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:14,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:07:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:07:14,716 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:15,548 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-04-06 20:07:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:07:15,548 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 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 97 [2022-04-06 20:07:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:15,549 INFO L225 Difference]: With dead ends: 108 [2022-04-06 20:07:15,549 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:07:15,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3660, Invalid=5652, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:07:15,550 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:15,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:07:15,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 20:07:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 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 20:07:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-04-06 20:07:15,555 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2022-04-06 20:07:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:15,556 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-04-06 20:07:15,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-04-06 20:07:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 20:07:15,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:15,556 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:15,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 20:07:15,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:15,764 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2025333296, now seen corresponding path program 83 times [2022-04-06 20:07:15,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:15,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [331387615] [2022-04-06 20:07:15,766 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:15,766 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2025333296, now seen corresponding path program 84 times [2022-04-06 20:07:15,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:15,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040063409] [2022-04-06 20:07:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:16,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:16,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040063409] [2022-04-06 20:07:16,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040063409] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679925667] [2022-04-06 20:07:16,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:16,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:16,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:16,544 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 20:07:16,573 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 20:07:16,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:07:16,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:16,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 129 proven. 1 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-04-06 20:07:16,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 129 proven. 1 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-04-06 20:07:16,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679925667] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:16,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:16,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 4, 4] total 51 [2022-04-06 20:07:16,909 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:16,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [331387615] [2022-04-06 20:07:16,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [331387615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:16,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:16,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:07:16,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69032679] [2022-04-06 20:07:16,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:16,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:07:16,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:16,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:07:16,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:07:16,911 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:17,819 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2022-04-06 20:07:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:07:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 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 99 [2022-04-06 20:07:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:17,820 INFO L225 Difference]: With dead ends: 110 [2022-04-06 20:07:17,820 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 20:07:17,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3471, Invalid=5459, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:07:17,821 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:17,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 20:07:17,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-06 20:07:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 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 20:07:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-04-06 20:07:17,826 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2022-04-06 20:07:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:17,827 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-04-06 20:07:17,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-04-06 20:07:17,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:07:17,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:17,827 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:17,854 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 20:07:18,041 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,SelfDestructingSolverStorable45 [2022-04-06 20:07:18,041 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:18,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:18,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1153906541, now seen corresponding path program 85 times [2022-04-06 20:07:18,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:18,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1116242101] [2022-04-06 20:07:18,043 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:18,043 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:18,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1153906541, now seen corresponding path program 86 times [2022-04-06 20:07:18,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:18,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491349456] [2022-04-06 20:07:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:18,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:18,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:18,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491349456] [2022-04-06 20:07:18,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491349456] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684031824] [2022-04-06 20:07:18,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:18,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:18,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:18,859 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 20:07:18,864 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 20:07:18,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:18,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:18,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:07:18,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:19,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:19,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684031824] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:19,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:19,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 54 [2022-04-06 20:07:19,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:19,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1116242101] [2022-04-06 20:07:19,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1116242101] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:19,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:19,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:07:19,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077007668] [2022-04-06 20:07:19,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:19,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:07:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:19,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:07:19,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:07:19,447 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:20,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:20,383 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2022-04-06 20:07:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:07:20,383 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 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 101 [2022-04-06 20:07:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:20,384 INFO L225 Difference]: With dead ends: 112 [2022-04-06 20:07:20,384 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 20:07:20,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3766, Invalid=5936, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:07:20,386 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:20,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 49 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 20:07:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-04-06 20:07:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 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 20:07:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-04-06 20:07:20,396 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2022-04-06 20:07:20,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:20,396 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-04-06 20:07:20,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:20,396 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-04-06 20:07:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 20:07:20,397 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:20,397 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:20,422 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 20:07:20,619 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,SelfDestructingSolverStorable46 [2022-04-06 20:07:20,620 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1613324854, now seen corresponding path program 87 times [2022-04-06 20:07:20,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:20,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1558740446] [2022-04-06 20:07:20,621 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:20,621 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:20,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1613324854, now seen corresponding path program 88 times [2022-04-06 20:07:20,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:20,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107590885] [2022-04-06 20:07:20,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:20,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:21,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:21,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107590885] [2022-04-06 20:07:21,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107590885] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:21,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790651280] [2022-04-06 20:07:21,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:21,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:21,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:21,491 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 20:07:21,492 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 20:07:21,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:21,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:21,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:07:21,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:21,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:22,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790651280] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:22,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:22,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 54 [2022-04-06 20:07:22,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:22,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1558740446] [2022-04-06 20:07:22,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1558740446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:22,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:22,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:07:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881199114] [2022-04-06 20:07:22,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:22,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:07:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:07:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:07:22,042 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:22,966 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2022-04-06 20:07:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:07:22,966 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 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 103 [2022-04-06 20:07:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:22,967 INFO L225 Difference]: With dead ends: 114 [2022-04-06 20:07:22,967 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 20:07:22,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3819, Invalid=6081, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:07:22,968 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:22,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 20:07:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-04-06 20:07:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 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 20:07:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-04-06 20:07:22,974 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2022-04-06 20:07:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:22,975 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-04-06 20:07:22,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-04-06 20:07:22,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 20:07:22,975 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:22,975 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:23,002 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 20:07:23,191 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,SelfDestructingSolverStorable47 [2022-04-06 20:07:23,191 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1957028071, now seen corresponding path program 89 times [2022-04-06 20:07:23,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:23,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [387011740] [2022-04-06 20:07:23,193 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:23,193 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1957028071, now seen corresponding path program 90 times [2022-04-06 20:07:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:23,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001883358] [2022-04-06 20:07:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:23,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:23,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:23,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:23,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001883358] [2022-04-06 20:07:23,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001883358] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:23,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153905235] [2022-04-06 20:07:23,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:23,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:23,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:23,957 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 20:07:23,958 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 20:07:23,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:07:23,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:23,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:23,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 138 proven. 1 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2022-04-06 20:07:24,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 138 proven. 1 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2022-04-06 20:07:24,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153905235] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:24,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:24,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 4, 4] total 54 [2022-04-06 20:07:24,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:24,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [387011740] [2022-04-06 20:07:24,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [387011740] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:24,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:24,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:07:24,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398172730] [2022-04-06 20:07:24,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:24,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:07:24,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:07:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:07:24,324 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:25,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:25,296 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2022-04-06 20:07:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:07:25,296 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 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 105 [2022-04-06 20:07:25,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:25,297 INFO L225 Difference]: With dead ends: 116 [2022-04-06 20:07:25,297 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 20:07:25,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3918, Invalid=6182, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:07:25,298 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:25,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 29 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:25,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 20:07:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-04-06 20:07:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 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 20:07:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-04-06 20:07:25,304 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2022-04-06 20:07:25,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:25,304 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-04-06 20:07:25,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-04-06 20:07:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:07:25,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:25,305 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:25,326 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 20:07:25,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:25,523 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1387319492, now seen corresponding path program 91 times [2022-04-06 20:07:25,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:25,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [841654535] [2022-04-06 20:07:25,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:25,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:25,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1387319492, now seen corresponding path program 92 times [2022-04-06 20:07:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:25,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204456541] [2022-04-06 20:07:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:25,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:26,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:26,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:26,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204456541] [2022-04-06 20:07:26,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204456541] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850006171] [2022-04-06 20:07:26,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:26,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:26,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:26,336 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 20:07:26,336 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 20:07:26,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:26,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:07:26,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:26,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:26,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850006171] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:26,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:26,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 54 [2022-04-06 20:07:26,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:26,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [841654535] [2022-04-06 20:07:26,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [841654535] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:26,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:26,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:07:26,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28142258] [2022-04-06 20:07:26,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:26,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:07:26,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:26,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:07:26,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:07:26,799 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:27,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:27,797 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2022-04-06 20:07:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:07:27,798 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 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 107 [2022-04-06 20:07:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:27,798 INFO L225 Difference]: With dead ends: 118 [2022-04-06 20:07:27,798 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 20:07:27,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3925, Invalid=6377, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:07:27,800 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:27,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 54 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:27,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 20:07:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-04-06 20:07:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 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 20:07:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-04-06 20:07:27,806 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2022-04-06 20:07:27,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:27,806 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-04-06 20:07:27,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-04-06 20:07:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 20:07:27,807 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:27,807 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:27,831 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 20:07:28,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 20:07:28,031 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:28,031 INFO L85 PathProgramCache]: Analyzing trace with hash -641778335, now seen corresponding path program 93 times [2022-04-06 20:07:28,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:28,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [577179080] [2022-04-06 20:07:28,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:28,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash -641778335, now seen corresponding path program 94 times [2022-04-06 20:07:28,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:28,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996530542] [2022-04-06 20:07:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:28,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:28,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:28,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:28,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996530542] [2022-04-06 20:07:28,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996530542] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:28,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029129123] [2022-04-06 20:07:28,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:28,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:28,890 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 20:07:28,899 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 20:07:28,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:28,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:28,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:07:28,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:29,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:29,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029129123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:29,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:29,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 54 [2022-04-06 20:07:29,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:29,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [577179080] [2022-04-06 20:07:29,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [577179080] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:29,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:29,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:07:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874401379] [2022-04-06 20:07:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:29,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:07:29,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:07:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:07:29,325 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:30,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:30,428 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2022-04-06 20:07:30,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:07:30,428 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 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 109 [2022-04-06 20:07:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:30,429 INFO L225 Difference]: With dead ends: 120 [2022-04-06 20:07:30,429 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 20:07:30,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:07:30,431 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:30,431 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 44 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 20:07:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-04-06 20:07:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 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 20:07:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-04-06 20:07:30,437 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2022-04-06 20:07:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:30,437 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-04-06 20:07:30,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-04-06 20:07:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 20:07:30,438 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:30,438 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:30,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-06 20:07:30,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:30,647 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash -689637698, now seen corresponding path program 95 times [2022-04-06 20:07:30,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:30,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1064369147] [2022-04-06 20:07:30,649 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:30,649 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:30,649 INFO L85 PathProgramCache]: Analyzing trace with hash -689637698, now seen corresponding path program 96 times [2022-04-06 20:07:30,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:30,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183111101] [2022-04-06 20:07:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:30,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:31,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:31,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:31,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183111101] [2022-04-06 20:07:31,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183111101] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:31,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78774191] [2022-04-06 20:07:31,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:31,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:31,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:31,523 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 20:07:31,524 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 20:07:31,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:07:31,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:31,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 147 proven. 1 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2022-04-06 20:07:31,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 147 proven. 1 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2022-04-06 20:07:31,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78774191] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:31,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:31,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 4, 4] total 57 [2022-04-06 20:07:31,896 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:31,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1064369147] [2022-04-06 20:07:31,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1064369147] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:31,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:31,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:07:31,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148650385] [2022-04-06 20:07:31,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:31,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:07:31,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:31,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:07:31,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:07:31,898 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:33,090 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2022-04-06 20:07:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:07:33,091 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 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 111 [2022-04-06 20:07:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:33,091 INFO L225 Difference]: With dead ends: 122 [2022-04-06 20:07:33,091 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 20:07:33,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4392, Invalid=6950, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:07:33,093 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:33,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 59 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 20:07:33,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-04-06 20:07:33,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 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 20:07:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-04-06 20:07:33,099 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2022-04-06 20:07:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:33,099 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-04-06 20:07:33,099 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-04-06 20:07:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:07:33,100 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:33,100 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:33,124 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 20:07:33,315 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,SelfDestructingSolverStorable51 [2022-04-06 20:07:33,315 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash 562154715, now seen corresponding path program 97 times [2022-04-06 20:07:33,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:33,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [641887994] [2022-04-06 20:07:33,317 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:33,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash 562154715, now seen corresponding path program 98 times [2022-04-06 20:07:33,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:33,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322462620] [2022-04-06 20:07:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:33,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:34,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:34,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:34,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322462620] [2022-04-06 20:07:34,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322462620] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:34,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949636248] [2022-04-06 20:07:34,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:34,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:34,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:34,311 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 20:07:34,312 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 20:07:34,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:34,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:07:34,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:34,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:36,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949636248] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:36,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:36,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 104 [2022-04-06 20:07:36,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:36,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [641887994] [2022-04-06 20:07:36,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [641887994] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:36,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:36,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:07:36,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759446825] [2022-04-06 20:07:36,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:36,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:07:36,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:36,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:07:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:07:36,901 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:38,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:38,071 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2022-04-06 20:07:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:07:38,071 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 states have internal predecessors, (109), 2 states have call successors, (3), 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 113 [2022-04-06 20:07:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:38,073 INFO L225 Difference]: With dead ends: 122 [2022-04-06 20:07:38,073 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 20:07:38,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10612, Invalid=13568, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 20:07:38,074 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:38,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 28 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 20:07:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-04-06 20:07:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 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 20:07:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-04-06 20:07:38,081 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 113 [2022-04-06 20:07:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:38,081 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-04-06 20:07:38,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-04-06 20:07:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 20:07:38,082 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:38,082 INFO L499 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:38,098 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 20:07:38,287 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,SelfDestructingSolverStorable52 [2022-04-06 20:07:38,287 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash 134474102, now seen corresponding path program 99 times [2022-04-06 20:07:38,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:38,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23952504] [2022-04-06 20:07:38,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:38,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:38,289 INFO L85 PathProgramCache]: Analyzing trace with hash 134474102, now seen corresponding path program 100 times [2022-04-06 20:07:38,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:38,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605138457] [2022-04-06 20:07:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:38,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:39,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:39,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:39,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605138457] [2022-04-06 20:07:39,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605138457] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:39,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567751571] [2022-04-06 20:07:39,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:39,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:39,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:39,288 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 20:07:39,288 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 20:07:39,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:39,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:39,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:07:39,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:39,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:41,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567751571] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:41,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:41,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 104 [2022-04-06 20:07:41,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23952504] [2022-04-06 20:07:41,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23952504] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:41,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:41,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:07:41,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275290015] [2022-04-06 20:07:41,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:41,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:07:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:07:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:07:41,877 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:43,078 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-04-06 20:07:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:07:43,079 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (3), 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 115 [2022-04-06 20:07:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:43,079 INFO L225 Difference]: With dead ends: 124 [2022-04-06 20:07:43,080 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 20:07:43,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10715, Invalid=13777, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:07:43,082 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:43,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 38 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 20:07:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-04-06 20:07:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 113 states have internal predecessors, (117), 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 20:07:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-04-06 20:07:43,088 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 115 [2022-04-06 20:07:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:43,089 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-04-06 20:07:43,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-04-06 20:07:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 20:07:43,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:43,090 INFO L499 BasicCegarLoop]: trace histogram [53, 50, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:43,115 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 20:07:43,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:43,303 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:43,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1450265425, now seen corresponding path program 101 times [2022-04-06 20:07:43,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:43,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [896101100] [2022-04-06 20:07:43,310 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:43,310 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:43,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1450265425, now seen corresponding path program 102 times [2022-04-06 20:07:43,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:43,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435448538] [2022-04-06 20:07:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:43,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:44,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:44,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:44,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435448538] [2022-04-06 20:07:44,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435448538] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:44,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522469212] [2022-04-06 20:07:44,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:44,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:44,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:44,371 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 20:07:44,372 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 20:07:44,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-06 20:07:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:07:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 350 proven. 9 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:07:44,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 350 proven. 9 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:07:44,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522469212] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:44,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:44,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 6, 6] total 61 [2022-04-06 20:07:44,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:44,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [896101100] [2022-04-06 20:07:44,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [896101100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:44,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:44,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:07:44,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854517636] [2022-04-06 20:07:44,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:44,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:07:44,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:44,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:07:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:07:44,793 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:46,095 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2022-04-06 20:07:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:07:46,095 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 states have internal predecessors, (113), 2 states have call successors, (3), 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 117 [2022-04-06 20:07:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:46,096 INFO L225 Difference]: With dead ends: 126 [2022-04-06 20:07:46,096 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 20:07:46,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5066, Invalid=8044, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:07:46,098 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:46,098 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 38 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 20:07:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-04-06 20:07:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 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 20:07:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-04-06 20:07:46,104 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 117 [2022-04-06 20:07:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:46,104 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-04-06 20:07:46,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-04-06 20:07:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:07:46,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:46,105 INFO L499 BasicCegarLoop]: trace histogram [54, 50, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:46,129 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 20:07:46,319 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,SelfDestructingSolverStorable54 [2022-04-06 20:07:46,320 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:46,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1089625492, now seen corresponding path program 103 times [2022-04-06 20:07:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:46,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [447857801] [2022-04-06 20:07:46,321 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:46,321 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1089625492, now seen corresponding path program 104 times [2022-04-06 20:07:46,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:46,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979730384] [2022-04-06 20:07:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:46,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:47,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:47,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:47,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979730384] [2022-04-06 20:07:47,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979730384] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:47,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469496484] [2022-04-06 20:07:47,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:47,404 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 20:07:47,408 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 20:07:47,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:47,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:07:47,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:47,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:49,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469496484] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:49,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:49,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 104 [2022-04-06 20:07:49,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:49,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [447857801] [2022-04-06 20:07:49,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [447857801] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:49,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:49,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:07:49,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149502445] [2022-04-06 20:07:49,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:49,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:07:49,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:49,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:07:49,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:07:49,963 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:51,251 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2022-04-06 20:07:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:07:51,252 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 states have internal predecessors, (115), 2 states have call successors, (3), 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 119 [2022-04-06 20:07:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:51,252 INFO L225 Difference]: With dead ends: 128 [2022-04-06 20:07:51,252 INFO L226 Difference]: Without dead ends: 123 [2022-04-06 20:07:51,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10921, Invalid=14201, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 20:07:51,254 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:51,255 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 53 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-06 20:07:51,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-04-06 20:07:51,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0512820512820513) internal successors, (123), 117 states have internal predecessors, (123), 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 20:07:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2022-04-06 20:07:51,264 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 119 [2022-04-06 20:07:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:51,264 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2022-04-06 20:07:51,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:51,264 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2022-04-06 20:07:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 20:07:51,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:51,265 INFO L499 BasicCegarLoop]: trace histogram [55, 50, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:51,281 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 20:07:51,465 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,SelfDestructingSolverStorable55 [2022-04-06 20:07:51,465 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:51,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1911594695, now seen corresponding path program 105 times [2022-04-06 20:07:51,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:51,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1839554674] [2022-04-06 20:07:51,467 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:51,467 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:51,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1911594695, now seen corresponding path program 106 times [2022-04-06 20:07:51,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:51,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264008322] [2022-04-06 20:07:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:51,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:52,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:52,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:52,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264008322] [2022-04-06 20:07:52,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264008322] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:52,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516510909] [2022-04-06 20:07:52,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:52,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:52,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:52,551 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 20:07:52,581 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 20:07:52,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:52,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:52,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:07:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:52,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:55,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516510909] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:55,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:55,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 104 [2022-04-06 20:07:55,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:55,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1839554674] [2022-04-06 20:07:55,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1839554674] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:55,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:55,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:07:55,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120915110] [2022-04-06 20:07:55,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:55,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:07:55,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:55,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:07:55,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:07:55,063 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:56,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:56,395 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-04-06 20:07:56,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:07:56,396 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 2 states have call successors, (3), 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 121 [2022-04-06 20:07:56,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:56,396 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:07:56,396 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 20:07:56,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11024, Invalid=14416, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:07:56,398 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:56,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 43 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:56,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 20:07:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-04-06 20:07:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0588235294117647) internal successors, (126), 119 states have internal predecessors, (126), 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 20:07:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2022-04-06 20:07:56,404 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 121 [2022-04-06 20:07:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:56,404 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2022-04-06 20:07:56,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2022-04-06 20:07:56,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 20:07:56,405 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:56,405 INFO L499 BasicCegarLoop]: trace histogram [56, 50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:56,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 20:07:56,606 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:56,606 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:56,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash -133828510, now seen corresponding path program 107 times [2022-04-06 20:07:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:56,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1702363606] [2022-04-06 20:07:56,608 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:56,608 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:56,608 INFO L85 PathProgramCache]: Analyzing trace with hash -133828510, now seen corresponding path program 108 times [2022-04-06 20:07:56,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:56,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505164344] [2022-04-06 20:07:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:56,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:57,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:57,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:57,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505164344] [2022-04-06 20:07:57,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505164344] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:57,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057272652] [2022-04-06 20:07:57,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:57,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:57,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:57,778 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 20:07:57,779 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 20:07:57,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-04-06 20:07:57,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:57,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:07:57,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:07:57,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:07:58,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057272652] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:58,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:58,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 9, 9] total 67 [2022-04-06 20:07:58,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:58,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1702363606] [2022-04-06 20:07:58,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1702363606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:58,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:58,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:07:58,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951397500] [2022-04-06 20:07:58,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:58,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:07:58,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:07:58,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:07:58,351 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:59,708 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2022-04-06 20:07:59,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:07:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 states have internal predecessors, (119), 2 states have call successors, (3), 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 123 [2022-04-06 20:07:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:59,709 INFO L225 Difference]: With dead ends: 132 [2022-04-06 20:07:59,709 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 20:07:59,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5966, Invalid=9286, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:07:59,711 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 122 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:59,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 33 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 20:07:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-04-06 20:07:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 121 states have internal predecessors, (129), 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 20:07:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 133 transitions. [2022-04-06 20:07:59,715 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 133 transitions. Word has length 123 [2022-04-06 20:07:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:59,716 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 133 transitions. [2022-04-06 20:07:59,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 133 transitions. [2022-04-06 20:07:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:07:59,716 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:59,716 INFO L499 BasicCegarLoop]: trace histogram [57, 50, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:59,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 20:07:59,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:59,917 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1309493053, now seen corresponding path program 109 times [2022-04-06 20:07:59,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:59,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [977962757] [2022-04-06 20:07:59,918 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:59,918 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:59,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1309493053, now seen corresponding path program 110 times [2022-04-06 20:07:59,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:59,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754366257] [2022-04-06 20:07:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:59,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:01,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:01,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:01,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:01,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754366257] [2022-04-06 20:08:01,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754366257] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:01,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776989214] [2022-04-06 20:08:01,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:01,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:01,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:01,105 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 20:08:01,107 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 20:08:01,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:01,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:08:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:01,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:03,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776989214] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:03,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:03,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 104 [2022-04-06 20:08:03,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:03,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [977962757] [2022-04-06 20:08:03,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [977962757] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:03,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:03,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:08:03,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193889219] [2022-04-06 20:08:03,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:03,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:08:03,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:03,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:08:03,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:08:03,509 INFO L87 Difference]: Start difference. First operand 126 states and 133 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:04,936 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2022-04-06 20:08:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:08:04,936 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 states have internal predecessors, (121), 2 states have call successors, (3), 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 125 [2022-04-06 20:08:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:04,937 INFO L225 Difference]: With dead ends: 134 [2022-04-06 20:08:04,937 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 20:08:04,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11230, Invalid=14852, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 20:08:04,939 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 124 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:04,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 43 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 20:08:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-04-06 20:08:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.0731707317073171) internal successors, (132), 123 states have internal predecessors, (132), 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 20:08:04,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2022-04-06 20:08:04,946 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 125 [2022-04-06 20:08:04,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:04,946 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2022-04-06 20:08:04,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:04,947 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2022-04-06 20:08:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 20:08:04,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:04,947 INFO L499 BasicCegarLoop]: trace histogram [58, 50, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:04,966 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 20:08:05,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:05,159 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1067078488, now seen corresponding path program 111 times [2022-04-06 20:08:05,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:05,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [183008744] [2022-04-06 20:08:05,161 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:05,161 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:05,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1067078488, now seen corresponding path program 112 times [2022-04-06 20:08:05,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:05,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676428032] [2022-04-06 20:08:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:05,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:06,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:06,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:06,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676428032] [2022-04-06 20:08:06,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676428032] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:06,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112541587] [2022-04-06 20:08:06,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:06,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:06,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:06,301 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 20:08:06,302 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 20:08:06,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:06,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:06,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:08:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:06,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:08,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112541587] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:08,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:08,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 104 [2022-04-06 20:08:08,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:08,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [183008744] [2022-04-06 20:08:08,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [183008744] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:08,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:08,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:08:08,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480032488] [2022-04-06 20:08:08,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:08,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:08:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:08,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:08:08,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:08:08,679 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:10,179 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2022-04-06 20:08:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:08:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 2 states have call successors, (3), 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 127 [2022-04-06 20:08:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:10,180 INFO L225 Difference]: With dead ends: 136 [2022-04-06 20:08:10,180 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 20:08:10,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11333, Invalid=15073, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 20:08:10,182 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 126 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:10,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 48 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 20:08:10,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-04-06 20:08:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.08) internal successors, (135), 125 states have internal predecessors, (135), 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 20:08:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2022-04-06 20:08:10,186 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 127 [2022-04-06 20:08:10,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:10,186 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2022-04-06 20:08:10,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:10,187 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2022-04-06 20:08:10,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 20:08:10,187 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:10,187 INFO L499 BasicCegarLoop]: trace histogram [59, 50, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:10,203 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 20:08:10,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:08:10,388 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash 34915507, now seen corresponding path program 113 times [2022-04-06 20:08:10,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:10,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665474111] [2022-04-06 20:08:10,389 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:10,389 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:10,389 INFO L85 PathProgramCache]: Analyzing trace with hash 34915507, now seen corresponding path program 114 times [2022-04-06 20:08:10,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:10,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766056672] [2022-04-06 20:08:10,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:10,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:11,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:11,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:11,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766056672] [2022-04-06 20:08:11,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766056672] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:11,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960650561] [2022-04-06 20:08:11,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:11,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:11,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:11,559 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 20:08:11,559 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 20:08:11,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2022-04-06 20:08:11,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:08:11,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 950 proven. 81 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:08:11,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 950 proven. 81 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:08:12,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960650561] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:12,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:12,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 12, 12] total 73 [2022-04-06 20:08:12,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:12,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665474111] [2022-04-06 20:08:12,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665474111] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:12,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:12,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:08:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313883573] [2022-04-06 20:08:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:12,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:08:12,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:08:12,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:08:12,284 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:13,787 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2022-04-06 20:08:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:08:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 states have internal predecessors, (125), 2 states have call successors, (3), 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 129 [2022-04-06 20:08:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:13,788 INFO L225 Difference]: With dead ends: 138 [2022-04-06 20:08:13,788 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 20:08:13,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6938, Invalid=10618, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:08:13,789 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 128 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:13,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 43 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 20:08:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-04-06 20:08:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 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 20:08:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2022-04-06 20:08:13,794 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 129 [2022-04-06 20:08:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:13,794 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2022-04-06 20:08:13,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2022-04-06 20:08:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 20:08:13,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:13,795 INFO L499 BasicCegarLoop]: trace histogram [60, 50, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:13,810 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 20:08:13,995 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,SelfDestructingSolverStorable60 [2022-04-06 20:08:13,995 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash 263736142, now seen corresponding path program 115 times [2022-04-06 20:08:13,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:13,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1252014204] [2022-04-06 20:08:13,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:13,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash 263736142, now seen corresponding path program 116 times [2022-04-06 20:08:13,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:13,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612975587] [2022-04-06 20:08:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:13,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:15,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:15,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612975587] [2022-04-06 20:08:15,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612975587] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828725777] [2022-04-06 20:08:15,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:15,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:15,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:15,213 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 20:08:15,214 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 20:08:15,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:15,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:15,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:08:15,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:15,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:17,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828725777] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:17,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:17,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 104 [2022-04-06 20:08:17,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:17,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1252014204] [2022-04-06 20:08:17,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1252014204] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:17,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:17,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:08:17,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560566665] [2022-04-06 20:08:17,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:17,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:08:17,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:17,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:08:17,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:08:17,529 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:19,104 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2022-04-06 20:08:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:08:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 2 states have call successors, (3), 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 131 [2022-04-06 20:08:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:19,105 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:08:19,105 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 20:08:19,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11539, Invalid=15521, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 20:08:19,107 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 130 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:19,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 58 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:19,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 20:08:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-04-06 20:08:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0930232558139534) internal successors, (141), 129 states have internal predecessors, (141), 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 20:08:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2022-04-06 20:08:19,114 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 131 [2022-04-06 20:08:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:19,115 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2022-04-06 20:08:19,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2022-04-06 20:08:19,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 20:08:19,115 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:19,115 INFO L499 BasicCegarLoop]: trace histogram [61, 50, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:19,141 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 20:08:19,338 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,SelfDestructingSolverStorable61 [2022-04-06 20:08:19,338 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1117034281, now seen corresponding path program 117 times [2022-04-06 20:08:19,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:19,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963907339] [2022-04-06 20:08:19,340 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:19,340 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:19,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1117034281, now seen corresponding path program 118 times [2022-04-06 20:08:19,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:19,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369858511] [2022-04-06 20:08:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:19,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:20,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:20,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:20,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369858511] [2022-04-06 20:08:20,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369858511] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:20,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503486595] [2022-04-06 20:08:20,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:20,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:20,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:20,574 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 20:08:20,575 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 20:08:20,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:20,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:20,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:08:20,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:20,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:22,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503486595] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:22,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:22,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 104 [2022-04-06 20:08:22,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:22,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963907339] [2022-04-06 20:08:22,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963907339] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:22,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:22,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:08:22,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990048988] [2022-04-06 20:08:22,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:22,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:08:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:08:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:08:22,899 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:24,575 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2022-04-06 20:08:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:08:24,575 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 states have internal predecessors, (129), 2 states have call successors, (3), 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 133 [2022-04-06 20:08:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:24,576 INFO L225 Difference]: With dead ends: 142 [2022-04-06 20:08:24,576 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 20:08:24,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11642, Invalid=15748, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:08:24,578 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 132 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:24,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 23 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 20:08:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-04-06 20:08:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.099236641221374) internal successors, (144), 131 states have internal predecessors, (144), 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 20:08:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2022-04-06 20:08:24,583 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 133 [2022-04-06 20:08:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:24,583 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2022-04-06 20:08:24,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2022-04-06 20:08:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 20:08:24,585 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:24,585 INFO L499 BasicCegarLoop]: trace histogram [62, 50, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:24,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-06 20:08:24,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:24,801 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash 797792324, now seen corresponding path program 119 times [2022-04-06 20:08:24,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:24,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [504937318] [2022-04-06 20:08:24,802 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:24,802 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:24,802 INFO L85 PathProgramCache]: Analyzing trace with hash 797792324, now seen corresponding path program 120 times [2022-04-06 20:08:24,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:24,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437373639] [2022-04-06 20:08:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:24,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:26,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:26,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:26,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437373639] [2022-04-06 20:08:26,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437373639] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:26,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250251525] [2022-04-06 20:08:26,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:26,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:26,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:26,089 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 20:08:26,090 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 20:08:26,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2022-04-06 20:08:26,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:26,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:08:26,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1250 proven. 144 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:08:26,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1250 proven. 144 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:08:26,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250251525] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:26,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:26,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 15, 15] total 79 [2022-04-06 20:08:26,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:26,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [504937318] [2022-04-06 20:08:26,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [504937318] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:26,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:26,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:08:26,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776219482] [2022-04-06 20:08:26,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:26,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:08:26,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:26,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:08:26,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:08:26,995 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:28,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:28,611 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2022-04-06 20:08:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:08:28,612 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 states have internal predecessors, (131), 2 states have call successors, (3), 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 135 [2022-04-06 20:08:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:28,613 INFO L225 Difference]: With dead ends: 144 [2022-04-06 20:08:28,613 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 20:08:28,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7982, Invalid=12040, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:08:28,614 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 134 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:28,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 38 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 20:08:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-04-06 20:08:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.105263157894737) internal successors, (147), 133 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 20:08:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 151 transitions. [2022-04-06 20:08:28,622 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 151 transitions. Word has length 135 [2022-04-06 20:08:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:28,622 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 151 transitions. [2022-04-06 20:08:28,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 151 transitions. [2022-04-06 20:08:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 20:08:28,623 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:28,623 INFO L499 BasicCegarLoop]: trace histogram [63, 50, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:28,641 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 20:08:28,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:28,831 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:28,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:28,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1051050337, now seen corresponding path program 121 times [2022-04-06 20:08:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:28,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822527623] [2022-04-06 20:08:28,833 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:28,833 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1051050337, now seen corresponding path program 122 times [2022-04-06 20:08:28,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:28,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385870486] [2022-04-06 20:08:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:30,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:30,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:30,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385870486] [2022-04-06 20:08:30,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385870486] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:30,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774781250] [2022-04-06 20:08:30,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:30,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:30,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:30,221 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 20:08:30,222 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 20:08:30,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:30,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:08:30,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:30,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:32,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774781250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:32,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:32,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 104 [2022-04-06 20:08:32,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:32,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822527623] [2022-04-06 20:08:32,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822527623] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:32,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:32,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:08:32,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751632549] [2022-04-06 20:08:32,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:32,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:08:32,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:08:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:08:32,497 INFO L87 Difference]: Start difference. First operand 138 states and 151 transitions. Second operand has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:34,196 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-04-06 20:08:34,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:08:34,196 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 states have internal predecessors, (133), 2 states have call successors, (3), 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 137 [2022-04-06 20:08:34,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:34,197 INFO L225 Difference]: With dead ends: 146 [2022-04-06 20:08:34,197 INFO L226 Difference]: Without dead ends: 141 [2022-04-06 20:08:34,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11848, Invalid=16208, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 20:08:34,198 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 136 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:34,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 33 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:34,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-04-06 20:08:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-04-06 20:08:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 135 states have internal predecessors, (150), 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 20:08:34,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2022-04-06 20:08:34,206 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 137 [2022-04-06 20:08:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:34,206 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2022-04-06 20:08:34,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2022-04-06 20:08:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 20:08:34,207 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:34,207 INFO L499 BasicCegarLoop]: trace histogram [64, 50, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:34,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 20:08:34,407 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,SelfDestructingSolverStorable64 [2022-04-06 20:08:34,408 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash 327612986, now seen corresponding path program 123 times [2022-04-06 20:08:34,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:34,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815551652] [2022-04-06 20:08:34,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:34,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash 327612986, now seen corresponding path program 124 times [2022-04-06 20:08:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:34,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79293892] [2022-04-06 20:08:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:34,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:35,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:35,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:35,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79293892] [2022-04-06 20:08:35,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79293892] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:35,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812943988] [2022-04-06 20:08:35,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:35,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:35,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:35,822 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 20:08:35,823 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 20:08:35,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:35,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:35,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:08:35,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:36,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:38,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812943988] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:38,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:38,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 104 [2022-04-06 20:08:38,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:38,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815551652] [2022-04-06 20:08:38,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815551652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:38,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:38,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:08:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246597352] [2022-04-06 20:08:38,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:38,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:08:38,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:08:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:08:38,039 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:39,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:39,799 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2022-04-06 20:08:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:08:39,800 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 states have internal predecessors, (135), 2 states have call successors, (3), 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 139 [2022-04-06 20:08:39,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:39,800 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:08:39,800 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 20:08:39,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=11951, Invalid=16441, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:08:39,801 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 138 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:39,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 33 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 20:08:39,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-04-06 20:08:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.1167883211678833) internal successors, (153), 137 states have internal predecessors, (153), 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 20:08:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2022-04-06 20:08:39,807 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 139 [2022-04-06 20:08:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:39,807 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2022-04-06 20:08:39,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2022-04-06 20:08:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 20:08:39,808 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:39,808 INFO L499 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:39,824 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 20:08:40,008 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,SelfDestructingSolverStorable65 [2022-04-06 20:08:40,008 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1921828075, now seen corresponding path program 125 times [2022-04-06 20:08:40,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:40,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [207524535] [2022-04-06 20:08:40,010 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:40,010 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:40,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1921828075, now seen corresponding path program 126 times [2022-04-06 20:08:40,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:40,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060243768] [2022-04-06 20:08:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:40,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:41,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:41,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060243768] [2022-04-06 20:08:41,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060243768] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774019104] [2022-04-06 20:08:41,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:41,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:41,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:41,467 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 20:08:41,468 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 20:08:41,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2022-04-06 20:08:41,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:08:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1550 proven. 225 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:08:41,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1550 proven. 225 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:08:42,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774019104] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:42,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:42,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 18, 18] total 85 [2022-04-06 20:08:42,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [207524535] [2022-04-06 20:08:42,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [207524535] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:42,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:42,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:08:42,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158126249] [2022-04-06 20:08:42,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:42,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:08:42,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:08:42,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:08:42,587 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:44,424 INFO L93 Difference]: Finished difference Result 150 states and 167 transitions. [2022-04-06 20:08:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:08:44,424 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 2 states have call successors, (3), 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 141 [2022-04-06 20:08:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:44,425 INFO L225 Difference]: With dead ends: 150 [2022-04-06 20:08:44,425 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 20:08:44,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9098, Invalid=13552, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:08:44,426 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 140 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:44,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 33 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 20:08:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-04-06 20:08:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.1223021582733812) internal successors, (156), 139 states have internal predecessors, (156), 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 20:08:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 160 transitions. [2022-04-06 20:08:44,435 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 160 transitions. Word has length 141 [2022-04-06 20:08:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:44,435 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 160 transitions. [2022-04-06 20:08:44,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 160 transitions. [2022-04-06 20:08:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:08:44,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:44,436 INFO L499 BasicCegarLoop]: trace histogram [66, 50, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:44,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:44,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:44,647 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:44,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1028829488, now seen corresponding path program 127 times [2022-04-06 20:08:44,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:44,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133563175] [2022-04-06 20:08:44,649 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:44,649 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1028829488, now seen corresponding path program 128 times [2022-04-06 20:08:44,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:44,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065502659] [2022-04-06 20:08:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:44,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:46,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:46,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:46,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065502659] [2022-04-06 20:08:46,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065502659] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:46,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572990414] [2022-04-06 20:08:46,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:46,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:46,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:46,148 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 20:08:46,148 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 20:08:46,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:46,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:46,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 20:08:46,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:46,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:48,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572990414] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:48,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:48,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 104 [2022-04-06 20:08:48,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:48,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [133563175] [2022-04-06 20:08:48,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [133563175] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:48,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:48,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:08:48,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806857245] [2022-04-06 20:08:48,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:48,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:08:48,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:08:48,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:08:48,326 INFO L87 Difference]: Start difference. First operand 144 states and 160 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:50,260 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2022-04-06 20:08:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:08:50,260 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 states have internal predecessors, (139), 2 states have call successors, (3), 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 143 [2022-04-06 20:08:50,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:50,263 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:08:50,263 INFO L226 Difference]: Without dead ends: 147 [2022-04-06 20:08:50,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12157, Invalid=16913, Unknown=0, NotChecked=0, Total=29070 [2022-04-06 20:08:50,266 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:50,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 23 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:50,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-04-06 20:08:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-04-06 20:08:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.127659574468085) internal successors, (159), 141 states have internal predecessors, (159), 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 20:08:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 163 transitions. [2022-04-06 20:08:50,275 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 163 transitions. Word has length 143 [2022-04-06 20:08:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:50,275 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 163 transitions. [2022-04-06 20:08:50,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 163 transitions. [2022-04-06 20:08:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 20:08:50,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:50,276 INFO L499 BasicCegarLoop]: trace histogram [67, 50, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:50,293 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 20:08:50,483 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,SelfDestructingSolverStorable67 [2022-04-06 20:08:50,483 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:50,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1932332171, now seen corresponding path program 129 times [2022-04-06 20:08:50,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:50,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1242346845] [2022-04-06 20:08:50,485 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:50,485 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:50,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1932332171, now seen corresponding path program 130 times [2022-04-06 20:08:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:50,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143059039] [2022-04-06 20:08:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:50,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:52,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:52,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:52,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143059039] [2022-04-06 20:08:52,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143059039] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:52,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628493258] [2022-04-06 20:08:52,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:52,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:52,007 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 20:08:52,009 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 20:08:52,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:52,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:52,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:08:52,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:52,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:54,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628493258] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:54,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:54,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 104 [2022-04-06 20:08:54,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:54,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1242346845] [2022-04-06 20:08:54,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1242346845] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:54,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:54,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:08:54,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170473788] [2022-04-06 20:08:54,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:54,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:08:54,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:54,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:08:54,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:08:54,130 INFO L87 Difference]: Start difference. First operand 146 states and 163 transitions. Second operand has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:56,060 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2022-04-06 20:08:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:08:56,060 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 states have internal predecessors, (141), 2 states have call successors, (3), 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 145 [2022-04-06 20:08:56,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:56,061 INFO L225 Difference]: With dead ends: 154 [2022-04-06 20:08:56,061 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 20:08:56,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12260, Invalid=17152, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 20:08:56,062 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:56,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 48 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 20:08:56,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-04-06 20:08:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.132867132867133) internal successors, (162), 143 states have internal predecessors, (162), 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 20:08:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2022-04-06 20:08:56,071 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 145 [2022-04-06 20:08:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:56,071 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2022-04-06 20:08:56,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2022-04-06 20:08:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 20:08:56,072 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:56,072 INFO L499 BasicCegarLoop]: trace histogram [68, 50, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:56,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:56,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:08:56,294 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1679950554, now seen corresponding path program 131 times [2022-04-06 20:08:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:56,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604937963] [2022-04-06 20:08:56,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:56,296 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:56,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1679950554, now seen corresponding path program 132 times [2022-04-06 20:08:56,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:56,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336258932] [2022-04-06 20:08:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:56,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:57,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:57,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:57,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336258932] [2022-04-06 20:08:57,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336258932] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:57,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531625627] [2022-04-06 20:08:57,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:57,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:57,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:57,849 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 20:08:57,850 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 20:08:57,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2022-04-06 20:08:57,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:57,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:08:57,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2346 proven. 1156 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2022-04-06 20:08:58,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2346 proven. 1156 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2022-04-06 20:08:59,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531625627] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:59,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:59,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 37, 37] total 103 [2022-04-06 20:08:59,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:59,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604937963] [2022-04-06 20:08:59,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604937963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:59,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:59,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:08:59,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087622154] [2022-04-06 20:08:59,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:59,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:08:59,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:59,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:08:59,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:08:59,961 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:01,964 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2022-04-06 20:09:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:09:01,964 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 states have internal predecessors, (143), 2 states have call successors, (3), 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 147 [2022-04-06 20:09:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:01,965 INFO L225 Difference]: With dead ends: 156 [2022-04-06 20:09:01,965 INFO L226 Difference]: Without dead ends: 151 [2022-04-06 20:09:01,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 263 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12260, Invalid=17152, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 20:09:01,967 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 146 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:01,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 43 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-06 20:09:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-04-06 20:09:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 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 20:09:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2022-04-06 20:09:01,976 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 147 [2022-04-06 20:09:01,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:01,976 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2022-04-06 20:09:01,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:01,976 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2022-04-06 20:09:01,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 20:09:01,977 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:01,977 INFO L499 BasicCegarLoop]: trace histogram [69, 50, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:02,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 20:09:02,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:09:02,191 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:02,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1544893185, now seen corresponding path program 133 times [2022-04-06 20:09:02,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:02,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796041361] [2022-04-06 20:09:02,193 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:02,193 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1544893185, now seen corresponding path program 134 times [2022-04-06 20:09:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:02,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057720270] [2022-04-06 20:09:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:03,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:03,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:03,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057720270] [2022-04-06 20:09:03,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057720270] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:03,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123914079] [2022-04-06 20:09:03,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:03,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:03,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:03,756 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 20:09:03,757 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 20:09:03,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:03,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:03,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:09:03,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:04,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:05,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123914079] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:05,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:05,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 104 [2022-04-06 20:09:05,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:05,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796041361] [2022-04-06 20:09:05,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796041361] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:05,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:05,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:09:05,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887113094] [2022-04-06 20:09:05,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:05,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:09:05,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:05,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:09:05,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:09:05,809 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:07,870 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2022-04-06 20:09:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:09:07,870 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 states have internal predecessors, (145), 2 states have call successors, (3), 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 149 [2022-04-06 20:09:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:07,871 INFO L225 Difference]: With dead ends: 158 [2022-04-06 20:09:07,871 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 20:09:07,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12466, Invalid=17636, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 20:09:07,873 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 148 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:07,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 38 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 20:09:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-04-06 20:09:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1428571428571428) internal successors, (168), 147 states have internal predecessors, (168), 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 20:09:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 172 transitions. [2022-04-06 20:09:07,883 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 172 transitions. Word has length 149 [2022-04-06 20:09:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:07,883 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 172 transitions. [2022-04-06 20:09:07,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 172 transitions. [2022-04-06 20:09:07,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 20:09:07,884 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:07,884 INFO L499 BasicCegarLoop]: trace histogram [70, 50, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:07,910 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 20:09:08,099 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,SelfDestructingSolverStorable70 [2022-04-06 20:09:08,099 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash -346661348, now seen corresponding path program 135 times [2022-04-06 20:09:08,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:08,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1897708167] [2022-04-06 20:09:08,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:08,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash -346661348, now seen corresponding path program 136 times [2022-04-06 20:09:08,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777912946] [2022-04-06 20:09:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:09,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:09,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:09,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777912946] [2022-04-06 20:09:09,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777912946] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:09,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800660857] [2022-04-06 20:09:09,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:09,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:09,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:09,687 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 20:09:09,687 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 20:09:09,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:09,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:09,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:09:09,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:09,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:11,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800660857] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:11,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:11,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 104 [2022-04-06 20:09:11,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:11,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1897708167] [2022-04-06 20:09:11,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1897708167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:11,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:11,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:09:11,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320122585] [2022-04-06 20:09:11,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:11,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:09:11,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:11,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:09:11,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:09:11,728 INFO L87 Difference]: Start difference. First operand 152 states and 172 transitions. Second operand has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:13,838 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2022-04-06 20:09:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:09:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 states have internal predecessors, (147), 2 states have call successors, (3), 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 151 [2022-04-06 20:09:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:13,840 INFO L225 Difference]: With dead ends: 160 [2022-04-06 20:09:13,840 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 20:09:13,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12569, Invalid=17881, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:09:13,841 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 150 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:13,841 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 48 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 20:09:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-04-06 20:09:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 149 states have internal predecessors, (171), 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 20:09:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 175 transitions. [2022-04-06 20:09:13,851 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 175 transitions. Word has length 151 [2022-04-06 20:09:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:13,852 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 175 transitions. [2022-04-06 20:09:13,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 175 transitions. [2022-04-06 20:09:13,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 20:09:13,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:13,853 INFO L499 BasicCegarLoop]: trace histogram [71, 50, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:13,871 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 20:09:14,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:14,063 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:14,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1359401353, now seen corresponding path program 137 times [2022-04-06 20:09:14,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1589213441] [2022-04-06 20:09:14,065 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:14,065 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1359401353, now seen corresponding path program 138 times [2022-04-06 20:09:14,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:14,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10191521] [2022-04-06 20:09:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:14,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:15,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:15,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:15,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:15,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10191521] [2022-04-06 20:09:15,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10191521] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:15,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295798263] [2022-04-06 20:09:15,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:15,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:15,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:15,696 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 20:09:15,697 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 20:09:15,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2022-04-06 20:09:15,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:15,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:09:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2556 proven. 1225 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-04-06 20:09:16,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2556 proven. 1225 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-04-06 20:09:17,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295798263] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:17,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:17,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 38, 38] total 103 [2022-04-06 20:09:17,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:17,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1589213441] [2022-04-06 20:09:17,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1589213441] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:17,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:17,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:09:17,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361730124] [2022-04-06 20:09:17,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:17,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:09:17,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:17,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:09:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:09:17,683 INFO L87 Difference]: Start difference. First operand 154 states and 175 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:19,854 INFO L93 Difference]: Finished difference Result 162 states and 185 transitions. [2022-04-06 20:09:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:09:19,855 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 states have internal predecessors, (149), 2 states have call successors, (3), 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 153 [2022-04-06 20:09:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:19,855 INFO L225 Difference]: With dead ends: 162 [2022-04-06 20:09:19,856 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 20:09:19,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 278 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12569, Invalid=17881, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:09:19,857 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:19,857 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 48 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 20:09:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-04-06 20:09:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.1523178807947019) internal successors, (174), 151 states have internal predecessors, (174), 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 20:09:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 178 transitions. [2022-04-06 20:09:19,864 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 178 transitions. Word has length 153 [2022-04-06 20:09:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:19,865 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 178 transitions. [2022-04-06 20:09:19,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 178 transitions. [2022-04-06 20:09:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 20:09:19,866 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:19,866 INFO L499 BasicCegarLoop]: trace histogram [72, 50, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:19,884 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 20:09:20,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:20,074 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash 355030034, now seen corresponding path program 139 times [2022-04-06 20:09:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:20,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1700193727] [2022-04-06 20:09:20,075 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:20,075 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:20,075 INFO L85 PathProgramCache]: Analyzing trace with hash 355030034, now seen corresponding path program 140 times [2022-04-06 20:09:20,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:20,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434015195] [2022-04-06 20:09:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:20,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:21,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:21,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:21,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434015195] [2022-04-06 20:09:21,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434015195] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:21,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026601817] [2022-04-06 20:09:21,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:21,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:21,768 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 20:09:21,769 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 20:09:21,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:21,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:21,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 20:09:21,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:22,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:23,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026601817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:23,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:23,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 104 [2022-04-06 20:09:23,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:23,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1700193727] [2022-04-06 20:09:23,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1700193727] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:23,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:23,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:09:23,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870601972] [2022-04-06 20:09:23,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:23,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:09:23,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:09:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:09:23,732 INFO L87 Difference]: Start difference. First operand 156 states and 178 transitions. Second operand has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:25,932 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2022-04-06 20:09:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:09:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 2 states have call successors, (3), 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 155 [2022-04-06 20:09:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:25,933 INFO L225 Difference]: With dead ends: 164 [2022-04-06 20:09:25,933 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 20:09:25,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12775, Invalid=18377, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 20:09:25,934 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 154 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:25,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 33 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 20:09:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-04-06 20:09:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.1568627450980393) internal successors, (177), 153 states have internal predecessors, (177), 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 20:09:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2022-04-06 20:09:25,946 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 155 [2022-04-06 20:09:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:25,946 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2022-04-06 20:09:25,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2022-04-06 20:09:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 20:09:25,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:25,947 INFO L499 BasicCegarLoop]: trace histogram [73, 50, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:25,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 20:09:26,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:26,163 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:26,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1343848723, now seen corresponding path program 141 times [2022-04-06 20:09:26,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:26,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670051497] [2022-04-06 20:09:26,165 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:26,165 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:26,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1343848723, now seen corresponding path program 142 times [2022-04-06 20:09:26,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:26,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285216572] [2022-04-06 20:09:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:26,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:27,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:27,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:27,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285216572] [2022-04-06 20:09:27,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285216572] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:27,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622811359] [2022-04-06 20:09:27,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:27,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:27,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:27,880 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 20:09:27,881 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 20:09:27,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:27,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:09:27,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:28,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:29,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622811359] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:29,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:29,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 104 [2022-04-06 20:09:29,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:29,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670051497] [2022-04-06 20:09:29,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670051497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:29,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:29,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:09:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588464267] [2022-04-06 20:09:29,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:29,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:09:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:09:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:09:29,806 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:32,062 INFO L93 Difference]: Finished difference Result 166 states and 191 transitions. [2022-04-06 20:09:32,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:09:32,062 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 states have internal predecessors, (153), 2 states have call successors, (3), 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 157 [2022-04-06 20:09:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:32,063 INFO L225 Difference]: With dead ends: 166 [2022-04-06 20:09:32,063 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 20:09:32,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3070 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=12878, Invalid=18628, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:09:32,065 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:32,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 38 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 20:09:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-04-06 20:09:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.1612903225806452) internal successors, (180), 155 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 20:09:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 184 transitions. [2022-04-06 20:09:32,077 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 184 transitions. Word has length 157 [2022-04-06 20:09:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:32,077 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 184 transitions. [2022-04-06 20:09:32,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 184 transitions. [2022-04-06 20:09:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 20:09:32,078 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:32,078 INFO L499 BasicCegarLoop]: trace histogram [74, 50, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:32,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:09:32,299 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,SelfDestructingSolverStorable74 [2022-04-06 20:09:32,299 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:32,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:32,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1878761720, now seen corresponding path program 143 times [2022-04-06 20:09:32,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:32,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1733452435] [2022-04-06 20:09:32,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:32,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:32,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1878761720, now seen corresponding path program 144 times [2022-04-06 20:09:32,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:32,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724055899] [2022-04-06 20:09:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:32,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:34,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:34,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724055899] [2022-04-06 20:09:34,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724055899] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:34,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556849286] [2022-04-06 20:09:34,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:34,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:34,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:34,093 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 20:09:34,093 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 20:09:34,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2022-04-06 20:09:34,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:34,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:09:34,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2774 proven. 1296 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 20:09:34,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2774 proven. 1296 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 20:09:35,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556849286] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:35,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:35,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 39, 39] total 103 [2022-04-06 20:09:35,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:35,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1733452435] [2022-04-06 20:09:35,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1733452435] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:35,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:35,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:09:35,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972520104] [2022-04-06 20:09:35,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:35,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:09:35,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:35,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:09:35,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:09:35,910 INFO L87 Difference]: Start difference. First operand 160 states and 184 transitions. Second operand has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:38,269 INFO L93 Difference]: Finished difference Result 168 states and 194 transitions. [2022-04-06 20:09:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:09:38,269 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 states have internal predecessors, (155), 2 states have call successors, (3), 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 159 [2022-04-06 20:09:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:38,270 INFO L225 Difference]: With dead ends: 168 [2022-04-06 20:09:38,270 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 20:09:38,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 293 SyntacticMatches, 2 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2886 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12878, Invalid=18628, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:09:38,273 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 158 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:38,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 33 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 20:09:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-04-06 20:09:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 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 20:09:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 187 transitions. [2022-04-06 20:09:38,285 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 187 transitions. Word has length 159 [2022-04-06 20:09:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:38,286 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 187 transitions. [2022-04-06 20:09:38,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:38,286 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 187 transitions. [2022-04-06 20:09:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 20:09:38,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:38,287 INFO L499 BasicCegarLoop]: trace histogram [75, 50, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:38,313 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 20:09:38,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:38,501 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:38,501 INFO L85 PathProgramCache]: Analyzing trace with hash -534076317, now seen corresponding path program 145 times [2022-04-06 20:09:38,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:38,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1734427045] [2022-04-06 20:09:38,502 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:38,502 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash -534076317, now seen corresponding path program 146 times [2022-04-06 20:09:38,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:38,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621014270] [2022-04-06 20:09:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:38,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:40,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:40,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621014270] [2022-04-06 20:09:40,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621014270] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052618505] [2022-04-06 20:09:40,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:40,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:40,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:40,325 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 20:09:40,326 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 20:09:40,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:40,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:40,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:09:40,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:40,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:42,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052618505] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:42,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:42,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 104 [2022-04-06 20:09:42,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:42,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1734427045] [2022-04-06 20:09:42,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1734427045] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:42,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:42,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:09:42,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956301348] [2022-04-06 20:09:42,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:42,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:09:42,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:42,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:09:42,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:09:42,133 INFO L87 Difference]: Start difference. First operand 162 states and 187 transitions. Second operand has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:44,514 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2022-04-06 20:09:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:09:44,517 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 states have internal predecessors, (157), 2 states have call successors, (3), 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 161 [2022-04-06 20:09:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:44,518 INFO L225 Difference]: With dead ends: 170 [2022-04-06 20:09:44,518 INFO L226 Difference]: Without dead ends: 165 [2022-04-06 20:09:44,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13084, Invalid=19136, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 20:09:44,520 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:44,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 33 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-04-06 20:09:44,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-04-06 20:09:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.169811320754717) internal successors, (186), 159 states have internal predecessors, (186), 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 20:09:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2022-04-06 20:09:44,532 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 161 [2022-04-06 20:09:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:44,533 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2022-04-06 20:09:44,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2022-04-06 20:09:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 20:09:44,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:44,534 INFO L499 BasicCegarLoop]: trace histogram [76, 50, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:44,555 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 20:09:44,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:44,747 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:44,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1076560130, now seen corresponding path program 147 times [2022-04-06 20:09:44,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:44,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1360401765] [2022-04-06 20:09:44,749 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:44,749 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:44,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1076560130, now seen corresponding path program 148 times [2022-04-06 20:09:44,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:44,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034612999] [2022-04-06 20:09:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:44,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:46,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:46,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:46,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034612999] [2022-04-06 20:09:46,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034612999] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:46,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810829100] [2022-04-06 20:09:46,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:46,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:46,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:46,590 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 20:09:46,591 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 20:09:46,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:46,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 20:09:46,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:46,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:48,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810829100] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:48,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:48,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 104 [2022-04-06 20:09:48,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:48,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1360401765] [2022-04-06 20:09:48,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1360401765] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:48,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:48,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 20:09:48,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46124499] [2022-04-06 20:09:48,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:48,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 20:09:48,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:48,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 20:09:48,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:09:48,347 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:50,759 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2022-04-06 20:09:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:09:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 states have internal predecessors, (159), 2 states have call successors, (3), 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 163 [2022-04-06 20:09:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:50,760 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:09:50,760 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 20:09:50,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3298 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13187, Invalid=19393, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 20:09:50,762 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 162 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:50,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 28 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:50,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 20:09:50,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-04-06 20:09:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.173913043478261) internal successors, (189), 161 states have internal predecessors, (189), 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 20:09:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 193 transitions. [2022-04-06 20:09:50,775 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 193 transitions. Word has length 163 [2022-04-06 20:09:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:50,775 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 193 transitions. [2022-04-06 20:09:50,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 193 transitions. [2022-04-06 20:09:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 20:09:50,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:50,777 INFO L499 BasicCegarLoop]: trace histogram [77, 50, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:50,802 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 20:09:50,997 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,SelfDestructingSolverStorable77 [2022-04-06 20:09:50,997 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:50,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:50,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1582505689, now seen corresponding path program 149 times [2022-04-06 20:09:50,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:50,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578597089] [2022-04-06 20:09:50,998 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:50,998 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:50,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1582505689, now seen corresponding path program 150 times [2022-04-06 20:09:50,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:50,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144218263] [2022-04-06 20:09:50,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:50,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:52,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:52,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144218263] [2022-04-06 20:09:52,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144218263] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699356891] [2022-04-06 20:09:52,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:52,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:52,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:52,902 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 20:09:52,902 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 20:09:52,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2022-04-06 20:09:52,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:52,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:09:52,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 3003 proven. 1444 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-04-06 20:09:53,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 3003 proven. 1444 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2022-04-06 20:09:54,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699356891] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:54,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:54,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 41, 41] total 103 [2022-04-06 20:09:54,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:54,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578597089] [2022-04-06 20:09:54,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578597089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:54,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:54,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 20:09:54,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977151364] [2022-04-06 20:09:54,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:54,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 20:09:54,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:54,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 20:09:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:09:54,612 INFO L87 Difference]: Start difference. First operand 166 states and 193 transitions. Second operand has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:57,075 INFO L93 Difference]: Finished difference Result 174 states and 203 transitions. [2022-04-06 20:09:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:09:57,075 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 states have internal predecessors, (161), 2 states have call successors, (3), 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 165 [2022-04-06 20:09:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:57,080 INFO L225 Difference]: With dead ends: 174 [2022-04-06 20:09:57,080 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 20:09:57,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 308 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13187, Invalid=19393, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 20:09:57,082 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 164 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:57,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 43 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 20:09:57,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-04-06 20:09:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.177914110429448) internal successors, (192), 163 states have internal predecessors, (192), 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 20:09:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2022-04-06 20:09:57,095 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 165 [2022-04-06 20:09:57,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:57,095 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2022-04-06 20:09:57,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2022-04-06 20:09:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 20:09:57,096 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:57,097 INFO L499 BasicCegarLoop]: trace histogram [78, 50, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:57,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 20:09:57,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-04-06 20:09:57,320 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:57,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1439216628, now seen corresponding path program 151 times [2022-04-06 20:09:57,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:57,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1828064486] [2022-04-06 20:09:57,321 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:57,321 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:57,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1439216628, now seen corresponding path program 152 times [2022-04-06 20:09:57,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:57,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59072647] [2022-04-06 20:09:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:57,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:59,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:59,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59072647] [2022-04-06 20:09:59,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59072647] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543662178] [2022-04-06 20:09:59,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:59,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:59,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:59,255 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 20:09:59,256 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 20:09:59,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:59,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:59,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 20:09:59,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:59,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:00,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543662178] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:00,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:00,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 104 [2022-04-06 20:10:00,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:00,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1828064486] [2022-04-06 20:10:00,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1828064486] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:00,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:00,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 20:10:00,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023162920] [2022-04-06 20:10:00,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:00,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 20:10:00,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:00,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 20:10:00,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:10:00,954 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:03,586 INFO L93 Difference]: Finished difference Result 176 states and 206 transitions. [2022-04-06 20:10:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:10:03,586 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 states have internal predecessors, (163), 2 states have call successors, (3), 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 167 [2022-04-06 20:10:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:03,587 INFO L225 Difference]: With dead ends: 176 [2022-04-06 20:10:03,587 INFO L226 Difference]: Without dead ends: 171 [2022-04-06 20:10:03,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3455 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13393, Invalid=19913, Unknown=0, NotChecked=0, Total=33306 [2022-04-06 20:10:03,589 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 166 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:03,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 38 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:10:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-06 20:10:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-04-06 20:10:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.1818181818181819) internal successors, (195), 165 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 20:10:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 199 transitions. [2022-04-06 20:10:03,599 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 199 transitions. Word has length 167 [2022-04-06 20:10:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:03,599 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 199 transitions. [2022-04-06 20:10:03,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 199 transitions. [2022-04-06 20:10:03,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 20:10:03,600 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:03,601 INFO L499 BasicCegarLoop]: trace histogram [79, 50, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:03,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:03,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:03,824 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1177382479, now seen corresponding path program 153 times [2022-04-06 20:10:03,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:03,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [419854300] [2022-04-06 20:10:03,826 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:03,826 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:03,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1177382479, now seen corresponding path program 154 times [2022-04-06 20:10:03,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:03,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125061421] [2022-04-06 20:10:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:03,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:05,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:05,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:05,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125061421] [2022-04-06 20:10:05,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125061421] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:05,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136007778] [2022-04-06 20:10:05,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:05,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:05,979 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 20:10:05,980 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 20:10:06,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:06,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:06,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:10:06,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:06,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:07,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136007778] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:07,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:07,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 104 [2022-04-06 20:10:07,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:07,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [419854300] [2022-04-06 20:10:07,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [419854300] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:07,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:07,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 20:10:07,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247385783] [2022-04-06 20:10:07,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:07,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 20:10:07,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:07,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 20:10:07,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:10:07,647 INFO L87 Difference]: Start difference. First operand 170 states and 199 transitions. Second operand has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:10,285 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2022-04-06 20:10:10,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 20:10:10,286 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 states have internal predecessors, (165), 2 states have call successors, (3), 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 169 [2022-04-06 20:10:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:10,286 INFO L225 Difference]: With dead ends: 178 [2022-04-06 20:10:10,286 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 20:10:10,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3535 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13496, Invalid=20176, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:10:10,288 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 168 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:10,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 53 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 20:10:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-04-06 20:10:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.18562874251497) internal successors, (198), 167 states have internal predecessors, (198), 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 20:10:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 202 transitions. [2022-04-06 20:10:10,302 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 202 transitions. Word has length 169 [2022-04-06 20:10:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:10,302 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 202 transitions. [2022-04-06 20:10:10,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 202 transitions. [2022-04-06 20:10:10,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 20:10:10,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:10,304 INFO L499 BasicCegarLoop]: trace histogram [80, 50, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:10,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:10,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:10,519 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:10,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1337131542, now seen corresponding path program 155 times [2022-04-06 20:10:10,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:10,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169910922] [2022-04-06 20:10:10,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:10,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1337131542, now seen corresponding path program 156 times [2022-04-06 20:10:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:10,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328992167] [2022-04-06 20:10:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:10,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:12,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:12,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:12,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328992167] [2022-04-06 20:10:12,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328992167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:12,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677657673] [2022-04-06 20:10:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:12,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:12,554 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 20:10:12,564 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 20:10:12,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2022-04-06 20:10:12,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:12,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:10:12,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3240 proven. 1600 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2022-04-06 20:10:13,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 3240 proven. 1600 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2022-04-06 20:10:14,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677657673] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:14,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:14,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 43, 43] total 103 [2022-04-06 20:10:14,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:14,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169910922] [2022-04-06 20:10:14,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169910922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:14,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:14,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 20:10:14,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824581802] [2022-04-06 20:10:14,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:14,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 20:10:14,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:14,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 20:10:14,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:10:14,113 INFO L87 Difference]: Start difference. First operand 172 states and 202 transitions. Second operand has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:16,850 INFO L93 Difference]: Finished difference Result 180 states and 212 transitions. [2022-04-06 20:10:16,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 20:10:16,851 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 states have internal predecessors, (167), 2 states have call successors, (3), 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 171 [2022-04-06 20:10:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:16,851 INFO L225 Difference]: With dead ends: 180 [2022-04-06 20:10:16,852 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 20:10:16,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3359 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13496, Invalid=20176, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:10:16,853 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 170 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:16,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 48 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 20:10:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-04-06 20:10:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.1893491124260356) internal successors, (201), 169 states have internal predecessors, (201), 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 20:10:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 205 transitions. [2022-04-06 20:10:16,868 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 205 transitions. Word has length 171 [2022-04-06 20:10:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:16,869 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 205 transitions. [2022-04-06 20:10:16,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 205 transitions. [2022-04-06 20:10:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:10:16,870 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:16,870 INFO L499 BasicCegarLoop]: trace histogram [81, 50, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:16,890 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 20:10:17,083 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,SelfDestructingSolverStorable81 [2022-04-06 20:10:17,083 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash 281481925, now seen corresponding path program 157 times [2022-04-06 20:10:17,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:17,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900289940] [2022-04-06 20:10:17,085 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:17,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:17,085 INFO L85 PathProgramCache]: Analyzing trace with hash 281481925, now seen corresponding path program 158 times [2022-04-06 20:10:17,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:17,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999799633] [2022-04-06 20:10:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:17,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:19,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:19,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:19,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999799633] [2022-04-06 20:10:19,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999799633] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:19,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182186012] [2022-04-06 20:10:19,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:19,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:19,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:19,194 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 20:10:19,194 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 20:10:19,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:19,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:19,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:10:19,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:19,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:20,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182186012] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:20,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:20,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 104 [2022-04-06 20:10:20,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:20,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900289940] [2022-04-06 20:10:20,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900289940] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:20,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:20,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 20:10:20,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190373147] [2022-04-06 20:10:20,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:20,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 20:10:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 20:10:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:10:20,776 INFO L87 Difference]: Start difference. First operand 174 states and 205 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:23,613 INFO L93 Difference]: Finished difference Result 182 states and 215 transitions. [2022-04-06 20:10:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 20:10:23,613 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 states have internal predecessors, (169), 2 states have call successors, (3), 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 173 [2022-04-06 20:10:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:23,614 INFO L225 Difference]: With dead ends: 182 [2022-04-06 20:10:23,614 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 20:10:23,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13702, Invalid=20708, Unknown=0, NotChecked=0, Total=34410 [2022-04-06 20:10:23,616 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 172 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:23,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 48 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:10:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 20:10:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-04-06 20:10:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.1929824561403508) internal successors, (204), 171 states have internal predecessors, (204), 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 20:10:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2022-04-06 20:10:23,631 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 173 [2022-04-06 20:10:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:23,632 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2022-04-06 20:10:23,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2022-04-06 20:10:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 20:10:23,633 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:23,633 INFO L499 BasicCegarLoop]: trace histogram [82, 50, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:23,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:23,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:23,856 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash 990862560, now seen corresponding path program 159 times [2022-04-06 20:10:23,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1645627594] [2022-04-06 20:10:23,857 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:23,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:23,857 INFO L85 PathProgramCache]: Analyzing trace with hash 990862560, now seen corresponding path program 160 times [2022-04-06 20:10:23,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:23,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202968738] [2022-04-06 20:10:23,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:23,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:26,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:26,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:26,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202968738] [2022-04-06 20:10:26,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202968738] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:26,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988236001] [2022-04-06 20:10:26,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:26,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:26,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:26,007 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 20:10:26,007 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 20:10:26,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:26,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:26,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 20:10:26,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:26,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:27,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988236001] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:27,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:27,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 104 [2022-04-06 20:10:27,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1645627594] [2022-04-06 20:10:27,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1645627594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:27,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:27,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 20:10:27,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655465723] [2022-04-06 20:10:27,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:27,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 20:10:27,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 20:10:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:10:27,556 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:30,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:30,364 INFO L93 Difference]: Finished difference Result 184 states and 218 transitions. [2022-04-06 20:10:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 20:10:30,364 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 states have internal predecessors, (171), 2 states have call successors, (3), 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 175 [2022-04-06 20:10:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:30,365 INFO L225 Difference]: With dead ends: 184 [2022-04-06 20:10:30,365 INFO L226 Difference]: Without dead ends: 179 [2022-04-06 20:10:30,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 333 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13805, Invalid=20977, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 20:10:30,366 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 174 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:30,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 48 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-04-06 20:10:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-04-06 20:10:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.1965317919075145) internal successors, (207), 173 states have internal predecessors, (207), 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 20:10:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 211 transitions. [2022-04-06 20:10:30,382 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 211 transitions. Word has length 175 [2022-04-06 20:10:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:30,383 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 211 transitions. [2022-04-06 20:10:30,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 211 transitions. [2022-04-06 20:10:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 20:10:30,383 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:30,383 INFO L499 BasicCegarLoop]: trace histogram [83, 50, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:30,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:30,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:30,584 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:30,584 INFO L85 PathProgramCache]: Analyzing trace with hash -194147269, now seen corresponding path program 161 times [2022-04-06 20:10:30,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:30,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1600242028] [2022-04-06 20:10:30,586 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:30,586 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash -194147269, now seen corresponding path program 162 times [2022-04-06 20:10:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:30,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739159008] [2022-04-06 20:10:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:30,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:32,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:32,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:32,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739159008] [2022-04-06 20:10:32,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739159008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:32,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964586153] [2022-04-06 20:10:32,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:32,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:32,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:32,752 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 20:10:32,753 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 20:10:32,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2022-04-06 20:10:32,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:32,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:10:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 1681 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-04-06 20:10:33,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 3486 proven. 1681 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-04-06 20:10:34,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964586153] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:34,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:34,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 44, 44] total 103 [2022-04-06 20:10:34,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:34,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1600242028] [2022-04-06 20:10:34,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1600242028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:34,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:34,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 20:10:34,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194051165] [2022-04-06 20:10:34,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:34,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 20:10:34,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 20:10:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:10:34,201 INFO L87 Difference]: Start difference. First operand 178 states and 211 transitions. Second operand has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:37,041 INFO L93 Difference]: Finished difference Result 186 states and 221 transitions. [2022-04-06 20:10:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:10:37,041 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 states have internal predecessors, (173), 2 states have call successors, (3), 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 177 [2022-04-06 20:10:37,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:37,042 INFO L225 Difference]: With dead ends: 186 [2022-04-06 20:10:37,042 INFO L226 Difference]: Without dead ends: 181 [2022-04-06 20:10:37,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13805, Invalid=20977, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 20:10:37,043 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 176 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:37,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 38 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-04-06 20:10:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-04-06 20:10:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.2) internal successors, (210), 175 states have internal predecessors, (210), 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 20:10:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 214 transitions. [2022-04-06 20:10:37,056 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 214 transitions. Word has length 177 [2022-04-06 20:10:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:37,056 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 214 transitions. [2022-04-06 20:10:37,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 214 transitions. [2022-04-06 20:10:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 20:10:37,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:37,057 INFO L499 BasicCegarLoop]: trace histogram [84, 50, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:37,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-06 20:10:37,271 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,SelfDestructingSolverStorable84 [2022-04-06 20:10:37,271 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:37,272 INFO L85 PathProgramCache]: Analyzing trace with hash -822259498, now seen corresponding path program 163 times [2022-04-06 20:10:37,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:37,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2023042467] [2022-04-06 20:10:37,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:37,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash -822259498, now seen corresponding path program 164 times [2022-04-06 20:10:37,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:37,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054439640] [2022-04-06 20:10:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:37,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:39,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:39,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:39,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054439640] [2022-04-06 20:10:39,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054439640] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:39,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296162466] [2022-04-06 20:10:39,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:39,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:39,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:39,497 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 20:10:39,497 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 20:10:39,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:39,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 20:10:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:39,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:40,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296162466] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:40,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:40,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 104 [2022-04-06 20:10:40,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:40,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2023042467] [2022-04-06 20:10:40,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2023042467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:40,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:40,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 20:10:40,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241682240] [2022-04-06 20:10:40,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:40,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 20:10:40,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 20:10:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:10:40,989 INFO L87 Difference]: Start difference. First operand 180 states and 214 transitions. Second operand has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:43,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:43,943 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2022-04-06 20:10:43,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 20:10:43,943 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 2 states have call successors, (3), 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 179 [2022-04-06 20:10:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:43,944 INFO L225 Difference]: With dead ends: 188 [2022-04-06 20:10:43,944 INFO L226 Difference]: Without dead ends: 183 [2022-04-06 20:10:43,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14011, Invalid=21521, Unknown=0, NotChecked=0, Total=35532 [2022-04-06 20:10:43,946 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 178 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:43,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 48 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:43,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-04-06 20:10:43,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-04-06 20:10:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2033898305084745) internal successors, (213), 177 states have internal predecessors, (213), 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 20:10:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 217 transitions. [2022-04-06 20:10:43,962 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 217 transitions. Word has length 179 [2022-04-06 20:10:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:43,963 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 217 transitions. [2022-04-06 20:10:43,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 217 transitions. [2022-04-06 20:10:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 20:10:43,964 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:43,964 INFO L499 BasicCegarLoop]: trace histogram [85, 50, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:43,986 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 20:10:44,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:44,182 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:44,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1152277169, now seen corresponding path program 165 times [2022-04-06 20:10:44,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:44,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [667015056] [2022-04-06 20:10:44,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:44,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1152277169, now seen corresponding path program 166 times [2022-04-06 20:10:44,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:44,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100428603] [2022-04-06 20:10:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:46,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:46,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:46,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100428603] [2022-04-06 20:10:46,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100428603] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:46,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485532706] [2022-04-06 20:10:46,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:46,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:46,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:46,465 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 20:10:46,465 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 20:10:46,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:46,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 20:10:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:46,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:47,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485532706] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:47,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:47,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 104 [2022-04-06 20:10:47,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:47,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [667015056] [2022-04-06 20:10:47,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [667015056] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:47,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:47,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 20:10:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048425947] [2022-04-06 20:10:47,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:47,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 20:10:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 20:10:47,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:10:47,943 INFO L87 Difference]: Start difference. First operand 182 states and 217 transitions. Second operand has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:50,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:50,983 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2022-04-06 20:10:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 20:10:50,983 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 states have internal predecessors, (177), 2 states have call successors, (3), 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 181 [2022-04-06 20:10:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:50,984 INFO L225 Difference]: With dead ends: 190 [2022-04-06 20:10:50,984 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 20:10:50,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4036 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14114, Invalid=21796, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 20:10:50,986 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 180 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:50,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 48 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:10:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 20:10:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-04-06 20:10:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.2067039106145252) internal successors, (216), 179 states have internal predecessors, (216), 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 20:10:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2022-04-06 20:10:51,004 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 181 [2022-04-06 20:10:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:51,004 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2022-04-06 20:10:51,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2022-04-06 20:10:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 20:10:51,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:51,006 INFO L499 BasicCegarLoop]: trace histogram [86, 50, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:51,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:51,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:51,222 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:51,222 INFO L85 PathProgramCache]: Analyzing trace with hash 306469324, now seen corresponding path program 167 times [2022-04-06 20:10:51,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:51,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [346993049] [2022-04-06 20:10:51,224 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:51,224 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:51,224 INFO L85 PathProgramCache]: Analyzing trace with hash 306469324, now seen corresponding path program 168 times [2022-04-06 20:10:51,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:51,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073517205] [2022-04-06 20:10:51,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:51,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:53,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:53,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073517205] [2022-04-06 20:10:53,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073517205] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:53,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270618424] [2022-04-06 20:10:53,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:53,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:53,546 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 20:10:53,546 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 20:10:53,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2022-04-06 20:10:53,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:10:53,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3741 proven. 1849 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-04-06 20:10:54,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3741 proven. 1849 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2022-04-06 20:10:54,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270618424] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:54,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:54,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 46, 46] total 103 [2022-04-06 20:10:54,855 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:54,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [346993049] [2022-04-06 20:10:54,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [346993049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:54,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:54,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 20:10:54,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032316651] [2022-04-06 20:10:54,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:54,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 20:10:54,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:54,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 20:10:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:10:54,857 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:57,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:57,951 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2022-04-06 20:10:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 20:10:57,952 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 states have internal predecessors, (179), 2 states have call successors, (3), 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 183 [2022-04-06 20:10:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:57,952 INFO L225 Difference]: With dead ends: 192 [2022-04-06 20:10:57,952 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 20:10:57,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3869 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14114, Invalid=21796, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 20:10:57,954 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 182 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:57,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 48 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 20:10:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-04-06 20:10:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 181 states have internal predecessors, (219), 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 20:10:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 223 transitions. [2022-04-06 20:10:57,967 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 223 transitions. Word has length 183 [2022-04-06 20:10:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:57,967 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 223 transitions. [2022-04-06 20:10:57,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 223 transitions. [2022-04-06 20:10:57,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 20:10:57,968 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:57,968 INFO L499 BasicCegarLoop]: trace histogram [87, 50, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:57,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 20:10:58,169 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,SelfDestructingSolverStorable87 [2022-04-06 20:10:58,169 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:58,170 INFO L85 PathProgramCache]: Analyzing trace with hash -766050777, now seen corresponding path program 169 times [2022-04-06 20:10:58,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:58,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1418244430] [2022-04-06 20:10:58,171 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:58,171 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:58,171 INFO L85 PathProgramCache]: Analyzing trace with hash -766050777, now seen corresponding path program 170 times [2022-04-06 20:10:58,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:58,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293022923] [2022-04-06 20:10:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:58,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:00,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:00,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293022923] [2022-04-06 20:11:00,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293022923] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:00,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565979939] [2022-04-06 20:11:00,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:11:00,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:00,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:00,552 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 20:11:00,553 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 20:11:00,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:11:00,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:00,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:11:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:00,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:01,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565979939] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:01,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:01,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 104 [2022-04-06 20:11:01,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:01,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1418244430] [2022-04-06 20:11:01,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1418244430] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:01,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:01,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 20:11:01,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377109151] [2022-04-06 20:11:01,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:01,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 20:11:01,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:01,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 20:11:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:11:01,936 INFO L87 Difference]: Start difference. First operand 186 states and 223 transitions. Second operand has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:05,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:05,105 INFO L93 Difference]: Finished difference Result 194 states and 233 transitions. [2022-04-06 20:11:05,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 20:11:05,105 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 states have internal predecessors, (181), 2 states have call successors, (3), 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 185 [2022-04-06 20:11:05,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:05,106 INFO L225 Difference]: With dead ends: 194 [2022-04-06 20:11:05,106 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 20:11:05,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 358 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14320, Invalid=22352, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 20:11:05,107 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 184 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:05,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 33 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:11:05,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 20:11:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-04-06 20:11:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.2131147540983607) internal successors, (222), 183 states have internal predecessors, (222), 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 20:11:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 226 transitions. [2022-04-06 20:11:05,127 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 226 transitions. Word has length 185 [2022-04-06 20:11:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:05,127 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 226 transitions. [2022-04-06 20:11:05,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 226 transitions. [2022-04-06 20:11:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 20:11:05,128 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:05,128 INFO L499 BasicCegarLoop]: trace histogram [88, 50, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:05,155 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 20:11:05,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:05,343 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:05,344 INFO L85 PathProgramCache]: Analyzing trace with hash -665716798, now seen corresponding path program 171 times [2022-04-06 20:11:05,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:05,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1406947905] [2022-04-06 20:11:05,345 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:05,345 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:05,345 INFO L85 PathProgramCache]: Analyzing trace with hash -665716798, now seen corresponding path program 172 times [2022-04-06 20:11:05,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:05,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119162451] [2022-04-06 20:11:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:05,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:07,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:07,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:07,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119162451] [2022-04-06 20:11:07,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119162451] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:07,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474451095] [2022-04-06 20:11:07,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:11:07,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:07,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:07,726 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 20:11:07,727 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 20:11:07,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:11:07,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:07,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 20:11:07,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:08,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:08,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474451095] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:08,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:08,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 104 [2022-04-06 20:11:08,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:08,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1406947905] [2022-04-06 20:11:08,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1406947905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:08,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:08,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 20:11:08,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785733864] [2022-04-06 20:11:08,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:08,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 20:11:08,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 20:11:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:11:08,992 INFO L87 Difference]: Start difference. First operand 188 states and 226 transitions. Second operand has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:12,179 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2022-04-06 20:11:12,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 20:11:12,180 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 states have internal predecessors, (183), 2 states have call successors, (3), 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 187 [2022-04-06 20:11:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:12,180 INFO L225 Difference]: With dead ends: 196 [2022-04-06 20:11:12,180 INFO L226 Difference]: Without dead ends: 191 [2022-04-06 20:11:12,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 363 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4300 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14423, Invalid=22633, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:11:12,182 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 186 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:12,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 43 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:12,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-06 20:11:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-04-06 20:11:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.2162162162162162) internal successors, (225), 185 states have internal predecessors, (225), 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 20:11:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 229 transitions. [2022-04-06 20:11:12,195 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 229 transitions. Word has length 187 [2022-04-06 20:11:12,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:12,195 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 229 transitions. [2022-04-06 20:11:12,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 229 transitions. [2022-04-06 20:11:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 20:11:12,196 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:12,196 INFO L499 BasicCegarLoop]: trace histogram [89, 50, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:12,213 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 20:11:12,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:12,397 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1265956509, now seen corresponding path program 173 times [2022-04-06 20:11:12,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:12,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [921336984] [2022-04-06 20:11:12,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:12,398 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:12,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1265956509, now seen corresponding path program 174 times [2022-04-06 20:11:12,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:12,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810893019] [2022-04-06 20:11:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:12,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:14,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:14,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810893019] [2022-04-06 20:11:14,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810893019] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119647094] [2022-04-06 20:11:14,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:11:14,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:14,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:14,868 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 20:11:14,868 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 20:11:14,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 90 check-sat command(s) [2022-04-06 20:11:14,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:14,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:11:14,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 4005 proven. 1936 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-04-06 20:11:15,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 4005 proven. 1936 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2022-04-06 20:11:16,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119647094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:16,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:16,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 47, 47] total 103 [2022-04-06 20:11:16,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:16,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [921336984] [2022-04-06 20:11:16,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [921336984] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:16,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:16,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 20:11:16,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774788265] [2022-04-06 20:11:16,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:16,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 20:11:16,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:16,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 20:11:16,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:11:16,043 INFO L87 Difference]: Start difference. First operand 190 states and 229 transitions. Second operand has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:19,378 INFO L93 Difference]: Finished difference Result 198 states and 239 transitions. [2022-04-06 20:11:19,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 20:11:19,379 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 states have internal predecessors, (185), 2 states have call successors, (3), 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 189 [2022-04-06 20:11:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:19,379 INFO L225 Difference]: With dead ends: 198 [2022-04-06 20:11:19,379 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 20:11:19,380 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 368 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4138 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14423, Invalid=22633, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:11:19,381 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 188 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:19,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 23 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:11:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 20:11:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-04-06 20:11:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.2192513368983957) internal successors, (228), 187 states have internal predecessors, (228), 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 20:11:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 232 transitions. [2022-04-06 20:11:19,395 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 232 transitions. Word has length 189 [2022-04-06 20:11:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:19,396 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 232 transitions. [2022-04-06 20:11:19,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 232 transitions. [2022-04-06 20:11:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 20:11:19,396 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:19,396 INFO L499 BasicCegarLoop]: trace histogram [90, 50, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:19,413 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 20:11:19,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:19,597 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:19,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2116834632, now seen corresponding path program 175 times [2022-04-06 20:11:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:19,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [694601262] [2022-04-06 20:11:19,598 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:19,598 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:19,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2116834632, now seen corresponding path program 176 times [2022-04-06 20:11:19,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:19,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831526377] [2022-04-06 20:11:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:19,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:22,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:22,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:22,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831526377] [2022-04-06 20:11:22,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831526377] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:22,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049240460] [2022-04-06 20:11:22,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:11:22,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:22,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:22,160 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 20:11:22,161 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 20:11:22,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:11:22,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 20:11:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:22,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:23,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049240460] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:23,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:23,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 104 [2022-04-06 20:11:23,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [694601262] [2022-04-06 20:11:23,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [694601262] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:23,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:23,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 20:11:23,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085327533] [2022-04-06 20:11:23,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:23,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 20:11:23,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:23,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 20:11:23,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:11:23,339 INFO L87 Difference]: Start difference. First operand 192 states and 232 transitions. Second operand has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:26,783 INFO L93 Difference]: Finished difference Result 200 states and 242 transitions. [2022-04-06 20:11:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 20:11:26,784 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 states have internal predecessors, (187), 2 states have call successors, (3), 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 191 [2022-04-06 20:11:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:26,785 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:11:26,785 INFO L226 Difference]: Without dead ends: 195 [2022-04-06 20:11:26,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4481 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14629, Invalid=23201, Unknown=0, NotChecked=0, Total=37830 [2022-04-06 20:11:26,786 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:26,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 33 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:11:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-04-06 20:11:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-04-06 20:11:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.2222222222222223) internal successors, (231), 189 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 20:11:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2022-04-06 20:11:26,808 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 191 [2022-04-06 20:11:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:26,808 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2022-04-06 20:11:26,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2022-04-06 20:11:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 20:11:26,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:26,810 INFO L499 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:26,833 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 20:11:27,031 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,SelfDestructingSolverStorable91 [2022-04-06 20:11:27,031 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1688878061, now seen corresponding path program 177 times [2022-04-06 20:11:27,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:27,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1712494409] [2022-04-06 20:11:27,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:27,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1688878061, now seen corresponding path program 178 times [2022-04-06 20:11:27,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:27,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044930350] [2022-04-06 20:11:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:27,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:29,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:29,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:29,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044930350] [2022-04-06 20:11:29,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044930350] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:29,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448177909] [2022-04-06 20:11:29,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:11:29,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:29,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:29,600 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 20:11:29,601 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 20:11:29,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:11:29,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:29,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 20:11:29,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:29,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:30,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448177909] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:30,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:30,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 104 [2022-04-06 20:11:30,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:30,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1712494409] [2022-04-06 20:11:30,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1712494409] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:30,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:30,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 20:11:30,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229290863] [2022-04-06 20:11:30,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:30,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 20:11:30,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 20:11:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:11:30,730 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:34,178 INFO L93 Difference]: Finished difference Result 202 states and 245 transitions. [2022-04-06 20:11:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 20:11:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 2 states have call successors, (3), 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 193 [2022-04-06 20:11:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:34,179 INFO L225 Difference]: With dead ends: 202 [2022-04-06 20:11:34,179 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 20:11:34,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 378 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4573 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14732, Invalid=23488, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:11:34,181 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 192 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:34,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 38 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 20:11:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-04-06 20:11:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.225130890052356) internal successors, (234), 191 states have internal predecessors, (234), 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 20:11:34,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 238 transitions. [2022-04-06 20:11:34,196 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 238 transitions. Word has length 193 [2022-04-06 20:11:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:34,196 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 238 transitions. [2022-04-06 20:11:34,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 238 transitions. [2022-04-06 20:11:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 20:11:34,197 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:34,197 INFO L499 BasicCegarLoop]: trace histogram [92, 50, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:34,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:34,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:34,397 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1555493550, now seen corresponding path program 179 times [2022-04-06 20:11:34,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:34,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1281853910] [2022-04-06 20:11:34,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:34,399 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:34,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1555493550, now seen corresponding path program 180 times [2022-04-06 20:11:34,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:34,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928141740] [2022-04-06 20:11:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:34,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:37,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:37,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:37,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928141740] [2022-04-06 20:11:37,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928141740] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:37,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701740903] [2022-04-06 20:11:37,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:11:37,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:37,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:37,056 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 20:11:37,056 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 20:11:37,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2022-04-06 20:11:37,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:37,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:11:37,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 4278 proven. 2116 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2022-04-06 20:11:37,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 4278 proven. 2116 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2022-04-06 20:11:38,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701740903] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:38,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:38,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 49, 49] total 103 [2022-04-06 20:11:38,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:38,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1281853910] [2022-04-06 20:11:38,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1281853910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:38,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:38,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 20:11:38,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672247463] [2022-04-06 20:11:38,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:38,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 20:11:38,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:38,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 20:11:38,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:11:38,106 INFO L87 Difference]: Start difference. First operand 196 states and 238 transitions. Second operand has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:41,865 INFO L93 Difference]: Finished difference Result 204 states and 248 transitions. [2022-04-06 20:11:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 20:11:41,866 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 states have internal predecessors, (191), 2 states have call successors, (3), 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 195 [2022-04-06 20:11:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:41,867 INFO L225 Difference]: With dead ends: 204 [2022-04-06 20:11:41,867 INFO L226 Difference]: Without dead ends: 199 [2022-04-06 20:11:41,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 383 SyntacticMatches, 2 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4415 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=14732, Invalid=23488, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:11:41,868 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 194 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:41,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 33 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:11:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-04-06 20:11:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-04-06 20:11:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.2279792746113989) internal successors, (237), 193 states have internal predecessors, (237), 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 20:11:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 241 transitions. [2022-04-06 20:11:41,887 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 241 transitions. Word has length 195 [2022-04-06 20:11:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:41,887 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 241 transitions. [2022-04-06 20:11:41,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 241 transitions. [2022-04-06 20:11:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 20:11:41,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:41,888 INFO L499 BasicCegarLoop]: trace histogram [93, 50, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:41,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 20:11:42,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:42,095 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:42,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:42,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1250354825, now seen corresponding path program 181 times [2022-04-06 20:11:42,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:42,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690905249] [2022-04-06 20:11:42,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:42,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:42,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1250354825, now seen corresponding path program 182 times [2022-04-06 20:11:42,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:42,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154216188] [2022-04-06 20:11:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:42,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:44,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:44,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:44,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154216188] [2022-04-06 20:11:44,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154216188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:44,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139345694] [2022-04-06 20:11:44,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:11:44,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:44,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:44,785 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 20:11:44,785 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 20:11:44,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:11:44,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:44,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:11:44,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:45,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:45,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139345694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:45,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:45,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 104 [2022-04-06 20:11:45,810 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:45,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690905249] [2022-04-06 20:11:45,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690905249] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:45,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:45,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 20:11:45,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837934213] [2022-04-06 20:11:45,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:45,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 20:11:45,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 20:11:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:11:45,811 INFO L87 Difference]: Start difference. First operand 198 states and 241 transitions. Second operand has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:49,380 INFO L93 Difference]: Finished difference Result 206 states and 251 transitions. [2022-04-06 20:11:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 20:11:49,380 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 states have internal predecessors, (193), 2 states have call successors, (3), 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 197 [2022-04-06 20:11:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:49,381 INFO L225 Difference]: With dead ends: 206 [2022-04-06 20:11:49,381 INFO L226 Difference]: Without dead ends: 201 [2022-04-06 20:11:49,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=14938, Invalid=24068, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 20:11:49,383 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 196 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:49,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 33 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-04-06 20:11:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-04-06 20:11:49,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.2307692307692308) internal successors, (240), 195 states have internal predecessors, (240), 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 20:11:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2022-04-06 20:11:49,407 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 197 [2022-04-06 20:11:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:49,407 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2022-04-06 20:11:49,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:49,407 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2022-04-06 20:11:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 20:11:49,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:49,408 INFO L499 BasicCegarLoop]: trace histogram [94, 50, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:49,424 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 20:11:49,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:49,609 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:49,609 INFO L85 PathProgramCache]: Analyzing trace with hash 69816228, now seen corresponding path program 183 times [2022-04-06 20:11:49,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:49,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1213541749] [2022-04-06 20:11:49,610 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:49,610 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:49,610 INFO L85 PathProgramCache]: Analyzing trace with hash 69816228, now seen corresponding path program 184 times [2022-04-06 20:11:49,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:49,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017732987] [2022-04-06 20:11:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:49,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:52,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:52,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:52,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017732987] [2022-04-06 20:11:52,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017732987] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:52,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634420089] [2022-04-06 20:11:52,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:11:52,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:52,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:52,352 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 20:11:52,353 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 20:11:52,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:11:52,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:52,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 20:11:52,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:52,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:53,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634420089] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:53,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:53,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 104 [2022-04-06 20:11:53,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1213541749] [2022-04-06 20:11:53,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1213541749] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:53,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:53,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 20:11:53,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31864797] [2022-04-06 20:11:53,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:53,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 20:11:53,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:53,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 20:11:53,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:11:53,342 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:57,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:57,009 INFO L93 Difference]: Finished difference Result 208 states and 254 transitions. [2022-04-06 20:11:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 20:11:57,010 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 states have internal predecessors, (195), 2 states have call successors, (3), 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 199 [2022-04-06 20:11:57,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:57,010 INFO L225 Difference]: With dead ends: 208 [2022-04-06 20:11:57,011 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 20:11:57,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 393 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4855 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15041, Invalid=24361, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:11:57,012 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 198 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:57,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 58 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:11:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 20:11:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-04-06 20:11:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.233502538071066) internal successors, (243), 197 states have internal predecessors, (243), 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 20:11:57,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 247 transitions. [2022-04-06 20:11:57,029 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 247 transitions. Word has length 199 [2022-04-06 20:11:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:57,029 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 247 transitions. [2022-04-06 20:11:57,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 247 transitions. [2022-04-06 20:11:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-04-06 20:11:57,030 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:57,030 INFO L499 BasicCegarLoop]: trace histogram [95, 50, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:57,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-04-06 20:11:57,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:57,230 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:57,231 INFO L85 PathProgramCache]: Analyzing trace with hash -556409345, now seen corresponding path program 185 times [2022-04-06 20:11:57,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:57,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122693388] [2022-04-06 20:11:57,232 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:57,232 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash -556409345, now seen corresponding path program 186 times [2022-04-06 20:11:57,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:57,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614551588] [2022-04-06 20:11:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:57,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:00,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:00,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:00,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614551588] [2022-04-06 20:12:00,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614551588] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:00,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244151232] [2022-04-06 20:12:00,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:12:00,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:00,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:00,047 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 20:12:00,048 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 20:12:00,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-04-06 20:12:00,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:12:00,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 4560 proven. 2209 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-04-06 20:12:00,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 4560 proven. 2209 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2022-04-06 20:12:00,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244151232] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:00,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:00,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 50, 50] total 103 [2022-04-06 20:12:00,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122693388] [2022-04-06 20:12:00,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122693388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:00,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:00,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 20:12:00,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228504045] [2022-04-06 20:12:00,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:00,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 20:12:00,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:00,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 20:12:00,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:12:00,956 INFO L87 Difference]: Start difference. First operand 202 states and 247 transitions. Second operand has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:04,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:04,751 INFO L93 Difference]: Finished difference Result 210 states and 257 transitions. [2022-04-06 20:12:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 20:12:04,751 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 states have internal predecessors, (197), 2 states have call successors, (3), 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 201 [2022-04-06 20:12:04,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:04,752 INFO L225 Difference]: With dead ends: 210 [2022-04-06 20:12:04,752 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 20:12:04,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 398 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4702 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15041, Invalid=24361, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:12:04,754 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 200 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:04,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 38 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:12:04,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 20:12:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-04-06 20:12:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.236180904522613) internal successors, (246), 199 states have internal predecessors, (246), 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 20:12:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 250 transitions. [2022-04-06 20:12:04,770 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 250 transitions. Word has length 201 [2022-04-06 20:12:04,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:04,771 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 250 transitions. [2022-04-06 20:12:04,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:04,771 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 250 transitions. [2022-04-06 20:12:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 20:12:04,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:04,772 INFO L499 BasicCegarLoop]: trace histogram [96, 50, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:04,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-04-06 20:12:04,972 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,SelfDestructingSolverStorable96 [2022-04-06 20:12:04,972 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:04,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:04,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1063763558, now seen corresponding path program 187 times [2022-04-06 20:12:04,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [420214682] [2022-04-06 20:12:04,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:12:04,974 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:04,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1063763558, now seen corresponding path program 188 times [2022-04-06 20:12:04,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:04,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768357213] [2022-04-06 20:12:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:04,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:07,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:07,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:07,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768357213] [2022-04-06 20:12:07,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768357213] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:07,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038391664] [2022-04-06 20:12:07,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:12:07,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:07,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:07,854 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 20:12:07,854 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 20:12:07,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:12:07,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:07,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 20:12:07,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:08,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:08,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038391664] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:08,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:08,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 104 [2022-04-06 20:12:08,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:08,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [420214682] [2022-04-06 20:12:08,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [420214682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:08,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:08,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 20:12:08,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915399535] [2022-04-06 20:12:08,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:08,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 20:12:08,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:08,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 20:12:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:12:08,755 INFO L87 Difference]: Start difference. First operand 204 states and 250 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:12,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:12,668 INFO L93 Difference]: Finished difference Result 212 states and 260 transitions. [2022-04-06 20:12:12,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 20:12:12,668 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 2 states have call successors, (3), 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 203 [2022-04-06 20:12:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:12,669 INFO L225 Difference]: With dead ends: 212 [2022-04-06 20:12:12,669 INFO L226 Difference]: Without dead ends: 207 [2022-04-06 20:12:12,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 403 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15247, Invalid=24953, Unknown=0, NotChecked=0, Total=40200 [2022-04-06 20:12:12,671 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 202 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:12,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 48 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:12:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-04-06 20:12:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-04-06 20:12:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.2388059701492538) internal successors, (249), 201 states have internal predecessors, (249), 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 20:12:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 253 transitions. [2022-04-06 20:12:12,698 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 253 transitions. Word has length 203 [2022-04-06 20:12:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:12,698 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 253 transitions. [2022-04-06 20:12:12,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 253 transitions. [2022-04-06 20:12:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-06 20:12:12,699 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:12,700 INFO L499 BasicCegarLoop]: trace histogram [97, 50, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:12,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 20:12:12,912 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,SelfDestructingSolverStorable97 [2022-04-06 20:12:12,913 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:12,913 INFO L85 PathProgramCache]: Analyzing trace with hash 995109493, now seen corresponding path program 189 times [2022-04-06 20:12:12,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:12,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1259235885] [2022-04-06 20:12:12,914 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:12:12,914 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:12,914 INFO L85 PathProgramCache]: Analyzing trace with hash 995109493, now seen corresponding path program 190 times [2022-04-06 20:12:12,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:12,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128835775] [2022-04-06 20:12:12,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:12,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:15,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:15,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:15,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128835775] [2022-04-06 20:12:15,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128835775] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:15,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565541153] [2022-04-06 20:12:15,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:12:15,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:15,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:15,873 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 20:12:15,874 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 20:12:15,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:12:15,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:15,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 20:12:15,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:16,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:16,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565541153] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:16,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:16,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 104 [2022-04-06 20:12:16,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:16,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1259235885] [2022-04-06 20:12:16,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1259235885] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:16,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:16,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 20:12:16,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408515627] [2022-04-06 20:12:16,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:16,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 20:12:16,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:16,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 20:12:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:12:16,739 INFO L87 Difference]: Start difference. First operand 206 states and 253 transitions. Second operand has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:20,738 INFO L93 Difference]: Finished difference Result 214 states and 263 transitions. [2022-04-06 20:12:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 20:12:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 states have internal predecessors, (201), 2 states have call successors, (3), 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 205 [2022-04-06 20:12:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:20,739 INFO L225 Difference]: With dead ends: 214 [2022-04-06 20:12:20,739 INFO L226 Difference]: Without dead ends: 209 [2022-04-06 20:12:20,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 408 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5146 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=15350, Invalid=25252, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:12:20,741 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 204 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:20,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 38 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:12:20,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-04-06 20:12:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-04-06 20:12:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.2413793103448276) internal successors, (252), 203 states have internal predecessors, (252), 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 20:12:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 256 transitions. [2022-04-06 20:12:20,767 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 256 transitions. Word has length 205 [2022-04-06 20:12:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:20,767 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 256 transitions. [2022-04-06 20:12:20,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 256 transitions. [2022-04-06 20:12:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-06 20:12:20,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:20,768 INFO L499 BasicCegarLoop]: trace histogram [98, 50, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:20,786 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 20:12:20,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:20,972 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:20,973 INFO L85 PathProgramCache]: Analyzing trace with hash -407811952, now seen corresponding path program 191 times [2022-04-06 20:12:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:20,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480585032] [2022-04-06 20:12:20,974 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:12:20,974 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:20,974 INFO L85 PathProgramCache]: Analyzing trace with hash -407811952, now seen corresponding path program 192 times [2022-04-06 20:12:20,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:20,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359786036] [2022-04-06 20:12:20,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:20,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:23,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:23,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:23,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359786036] [2022-04-06 20:12:23,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359786036] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:23,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050511598] [2022-04-06 20:12:23,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:12:23,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:23,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:23,992 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 20:12:23,993 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 20:12:24,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 99 check-sat command(s) [2022-04-06 20:12:24,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:12:24,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 4851 proven. 2401 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2022-04-06 20:12:24,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 4851 proven. 2401 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2022-04-06 20:12:24,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050511598] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:24,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:24,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 52, 52] total 103 [2022-04-06 20:12:24,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:24,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480585032] [2022-04-06 20:12:24,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480585032] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:24,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:24,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 20:12:24,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095003467] [2022-04-06 20:12:24,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:24,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 20:12:24,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:24,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 20:12:24,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:12:24,768 INFO L87 Difference]: Start difference. First operand 208 states and 256 transitions. Second operand has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:28,926 INFO L93 Difference]: Finished difference Result 216 states and 266 transitions. [2022-04-06 20:12:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 20:12:28,926 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (3), 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 207 [2022-04-06 20:12:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:28,927 INFO L225 Difference]: With dead ends: 216 [2022-04-06 20:12:28,927 INFO L226 Difference]: Without dead ends: 211 [2022-04-06 20:12:28,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 413 SyntacticMatches, 2 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4997 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15350, Invalid=25252, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:12:28,929 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:28,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 18 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:12:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-04-06 20:12:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-04-06 20:12:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2439024390243902) internal successors, (255), 205 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 20:12:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 259 transitions. [2022-04-06 20:12:28,958 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 259 transitions. Word has length 207 [2022-04-06 20:12:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:28,958 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 259 transitions. [2022-04-06 20:12:28,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 259 transitions. [2022-04-06 20:12:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 20:12:28,959 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:28,959 INFO L499 BasicCegarLoop]: trace histogram [99, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:28,985 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 20:12:29,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:29,183 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash 4410347, now seen corresponding path program 193 times [2022-04-06 20:12:29,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:29,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [810674595] [2022-04-06 20:12:29,185 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:12:29,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 4410347, now seen corresponding path program 194 times [2022-04-06 20:12:29,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:29,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184389156] [2022-04-06 20:12:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:29,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:32,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:32,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:32,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184389156] [2022-04-06 20:12:32,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184389156] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:32,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871886495] [2022-04-06 20:12:32,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:12:32,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:32,275 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 20:12:32,275 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 20:12:32,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:12:32,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:32,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:12:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:32,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:12:33,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871886495] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:33,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:33,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 104 [2022-04-06 20:12:33,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:33,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [810674595] [2022-04-06 20:12:33,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [810674595] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:33,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:33,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 20:12:33,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859144259] [2022-04-06 20:12:33,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:33,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 20:12:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 20:12:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:12:33,060 INFO L87 Difference]: Start difference. First operand 210 states and 259 transitions. Second operand has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:37,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:37,259 INFO L93 Difference]: Finished difference Result 217 states and 267 transitions. [2022-04-06 20:12:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 20:12:37,260 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 states have internal predecessors, (205), 2 states have call successors, (3), 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 209 [2022-04-06 20:12:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:37,261 INFO L225 Difference]: With dead ends: 217 [2022-04-06 20:12:37,261 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 20:12:37,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 418 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2022-04-06 20:12:37,263 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 658 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 658 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:37,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 48 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [658 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:12:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 20:12:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 20:12:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2463768115942029) internal successors, (258), 207 states have internal predecessors, (258), 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 20:12:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 262 transitions. [2022-04-06 20:12:37,294 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 262 transitions. Word has length 209 [2022-04-06 20:12:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:37,294 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 262 transitions. [2022-04-06 20:12:37,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 262 transitions. [2022-04-06 20:12:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-04-06 20:12:37,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:37,295 INFO L499 BasicCegarLoop]: trace histogram [100, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:37,323 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 20:12:37,519 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,SelfDestructingSolverStorable100 [2022-04-06 20:12:37,520 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:37,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1013048454, now seen corresponding path program 195 times [2022-04-06 20:12:37,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:37,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1606704613] [2022-04-06 20:12:37,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:12:37,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:37,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1013048454, now seen corresponding path program 196 times [2022-04-06 20:12:37,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:37,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298667949] [2022-04-06 20:12:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:37,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:38,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-04-06 20:12:38,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:38,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298667949] [2022-04-06 20:12:38,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298667949] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:38,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715755056] [2022-04-06 20:12:38,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:12:38,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:38,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:38,887 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 20:12:38,888 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 20:12:38,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:12:38,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:38,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 20:12:38,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-04-06 20:12:39,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 7450 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-04-06 20:12:40,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715755056] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:40,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:40,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 58 [2022-04-06 20:12:40,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:40,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1606704613] [2022-04-06 20:12:40,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1606704613] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:40,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:40,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:12:40,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411100079] [2022-04-06 20:12:40,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:40,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:12:40,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:40,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:12:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:12:40,790 INFO L87 Difference]: Start difference. First operand 212 states and 262 transitions. Second operand has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 54 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:44,871 INFO L93 Difference]: Finished difference Result 2868 states and 4243 transitions. [2022-04-06 20:12:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:12:44,871 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 54 states have internal predecessors, (108), 2 states have call successors, (3), 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 211 [2022-04-06 20:12:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:44,875 INFO L225 Difference]: With dead ends: 2868 [2022-04-06 20:12:44,875 INFO L226 Difference]: Without dead ends: 2863 [2022-04-06 20:12:44,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 417 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=329, Invalid=11881, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:12:44,876 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 164 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 8327 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 8381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 8327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:44,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 379 Invalid, 8381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 8327 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:12:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-04-06 20:12:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 214. [2022-04-06 20:12:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.2488038277511961) internal successors, (261), 209 states have internal predecessors, (261), 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 20:12:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 265 transitions. [2022-04-06 20:12:44,946 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 265 transitions. Word has length 211 [2022-04-06 20:12:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:44,946 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 265 transitions. [2022-04-06 20:12:44,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 54 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 265 transitions. [2022-04-06 20:12:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 20:12:44,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:44,947 INFO L499 BasicCegarLoop]: trace histogram [101, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:44,964 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 20:12:45,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:45,149 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash -348339615, now seen corresponding path program 197 times [2022-04-06 20:12:45,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:45,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [49423542] [2022-04-06 20:12:45,150 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:12:45,150 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:45,151 INFO L85 PathProgramCache]: Analyzing trace with hash -348339615, now seen corresponding path program 198 times [2022-04-06 20:12:45,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:45,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570636489] [2022-04-06 20:12:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:45,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:46,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 7651 proven. 0 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2022-04-06 20:12:46,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:46,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570636489] [2022-04-06 20:12:46,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570636489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:46,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:46,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:12:46,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:46,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [49423542] [2022-04-06 20:12:46,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [49423542] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:46,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:46,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:12:46,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259353671] [2022-04-06 20:12:46,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:46,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:12:46,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:46,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:12:46,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:12:46,081 INFO L87 Difference]: Start difference. First operand 214 states and 265 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:46,953 INFO L93 Difference]: Finished difference Result 313 states and 413 transitions. [2022-04-06 20:12:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:12:46,954 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 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 213 [2022-04-06 20:12:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:46,954 INFO L225 Difference]: With dead ends: 313 [2022-04-06 20:12:46,954 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 20:12:46,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:12:46,955 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:46,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:12:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 20:12:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 20:12:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 20:12:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 20:12:46,956 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 213 [2022-04-06 20:12:46,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:46,956 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 20:12:46,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 52 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:46,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 20:12:46,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 20:12:46,958 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 20:12:46,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-04-06 20:12:46,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.