/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 07:30:16,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 07:30:16,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 07:30:16,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 07:30:16,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 07:30:16,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 07:30:16,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 07:30:16,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 07:30:16,477 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 07:30:16,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 07:30:16,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 07:30:16,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 07:30:16,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 07:30:16,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 07:30:16,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 07:30:16,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 07:30:16,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 07:30:16,482 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 07:30:16,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 07:30:16,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 07:30:16,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 07:30:16,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 07:30:16,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 07:30:16,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:30:16,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 07:30:16,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 07:30:16,483 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 07:30:16,483 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 07:30:16,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 07:30:16,484 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 07:30:16,484 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 07:30:16,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 07:30:16,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 07:30:16,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 07:30:16,756 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 07:30:16,757 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 07:30:16,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-03-19 07:30:16,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c275d776f/ed585bc2787f4abc9af01baefda12b9d/FLAGf0c87a696 [2022-03-19 07:30:17,223 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 07:30:17,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-03-19 07:30:17,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c275d776f/ed585bc2787f4abc9af01baefda12b9d/FLAGf0c87a696 [2022-03-19 07:30:17,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c275d776f/ed585bc2787f4abc9af01baefda12b9d [2022-03-19 07:30:17,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 07:30:17,632 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 07:30:17,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 07:30:17,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 07:30:17,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 07:30:17,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:30:17" (1/1) ... [2022-03-19 07:30:17,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347781f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17, skipping insertion in model container [2022-03-19 07:30:17,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 07:30:17" (1/1) ... [2022-03-19 07:30:17,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 07:30:17,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 07:30:17,821 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-03-19 07:30:17,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:30:17,850 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 07:30:17,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-03-19 07:30:17,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 07:30:17,889 INFO L208 MainTranslator]: Completed translation [2022-03-19 07:30:17,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17 WrapperNode [2022-03-19 07:30:17,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 07:30:17,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 07:30:17,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 07:30:17,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 07:30:17,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17" (1/1) ... [2022-03-19 07:30:17,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17" (1/1) ... [2022-03-19 07:30:17,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17" (1/1) ... [2022-03-19 07:30:17,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17" (1/1) ... [2022-03-19 07:30:17,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17" (1/1) ... [2022-03-19 07:30:17,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17" (1/1) ... [2022-03-19 07:30:17,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17" (1/1) ... [2022-03-19 07:30:17,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 07:30:17,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 07:30:17,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 07:30:17,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 07:30:17,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17" (1/1) ... [2022-03-19 07:30:17,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 07:30:17,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:17,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 07:30:18,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 07:30:18,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 07:30:18,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 07:30:18,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 07:30:18,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 07:30:18,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 07:30:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 07:30:18,026 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 07:30:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 07:30:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 07:30:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 07:30:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 07:30:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 07:30:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-19 07:30:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 07:30:18,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 07:30:18,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 07:30:18,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 07:30:18,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 07:30:18,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 07:30:18,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 07:30:18,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 07:30:18,112 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 07:30:18,114 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 07:30:18,366 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 07:30:18,376 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 07:30:18,376 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-19 07:30:18,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:30:18 BoogieIcfgContainer [2022-03-19 07:30:18,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 07:30:18,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 07:30:18,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 07:30:18,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 07:30:18,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 07:30:17" (1/3) ... [2022-03-19 07:30:18,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf29201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:30:18, skipping insertion in model container [2022-03-19 07:30:18,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 07:30:17" (2/3) ... [2022-03-19 07:30:18,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cf29201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 07:30:18, skipping insertion in model container [2022-03-19 07:30:18,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 07:30:18" (3/3) ... [2022-03-19 07:30:18,387 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-03-19 07:30:18,391 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 07:30:18,392 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 07:30:18,439 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 07:30:18,447 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 07:30:18,447 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 07:30:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 07:30:18,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 07:30:18,472 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:18,473 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:18,473 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-03-19 07:30:18,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:18,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1699587947] [2022-03-19 07:30:18,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:30:18,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 2 times [2022-03-19 07:30:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:18,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51862088] [2022-03-19 07:30:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:18,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:18,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:30:18,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51862088] [2022-03-19 07:30:18,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51862088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:18,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:18,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 07:30:18,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:18,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1699587947] [2022-03-19 07:30:18,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1699587947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:18,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:18,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 07:30:18,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233190969] [2022-03-19 07:30:18,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:18,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 07:30:18,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:18,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 07:30:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 07:30:18,749 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:18,813 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-03-19 07:30:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 07:30:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 07:30:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:18,821 INFO L225 Difference]: With dead ends: 64 [2022-03-19 07:30:18,821 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 07:30:18,824 INFO L911 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 [2022-03-19 07:30:18,828 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 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 [2022-03-19 07:30:18,829 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:30:18,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 07:30:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-19 07:30:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-03-19 07:30:18,868 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-03-19 07:30:18,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:18,869 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-03-19 07:30:18,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:18,869 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-03-19 07:30:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 07:30:18,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:18,870 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:18,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 07:30:18,871 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-03-19 07:30:18,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:18,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1722362554] [2022-03-19 07:30:18,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 07:30:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 2 times [2022-03-19 07:30:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:18,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433513875] [2022-03-19 07:30:18,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:18,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:18,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:30:18,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:18,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433513875] [2022-03-19 07:30:18,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433513875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:18,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:18,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:30:18,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1722362554] [2022-03-19 07:30:18,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1722362554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:18,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:18,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:30:18,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774053564] [2022-03-19 07:30:18,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:18,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 07:30:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 07:30:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 07:30:18,979 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:19,089 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-03-19 07:30:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 07:30:19,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 07:30:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:19,092 INFO L225 Difference]: With dead ends: 65 [2022-03-19 07:30:19,092 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 07:30:19,093 INFO L911 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 [2022-03-19 07:30:19,094 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:19,094 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:30:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 07:30:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-03-19 07:30:19,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 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) [2022-03-19 07:30:19,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-19 07:30:19,102 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-03-19 07:30:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:19,102 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-19 07:30:19,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:19,102 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-19 07:30:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 07:30:19,103 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:19,103 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:19,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 07:30:19,103 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-03-19 07:30:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2071356648] [2022-03-19 07:30:19,126 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:19,126 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:19,126 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 2 times [2022-03-19 07:30:19,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:19,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320055705] [2022-03-19 07:30:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:19,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:19,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 07:30:19,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320055705] [2022-03-19 07:30:19,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320055705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375162273] [2022-03-19 07:30:19,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:19,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:19,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:19,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:19,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 07:30:19,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 07:30:19,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 07:30:19,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 07:30:19,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 07:30:19,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375162273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:19,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 07:30:19,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-19 07:30:19,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:19,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2071356648] [2022-03-19 07:30:19,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2071356648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:19,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:19,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:30:19,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790067774] [2022-03-19 07:30:19,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:19,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 07:30:19,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 07:30:19,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 07:30:19,454 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:19,482 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-19 07:30:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 07:30:19,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-19 07:30:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:19,483 INFO L225 Difference]: With dead ends: 54 [2022-03-19 07:30:19,483 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 07:30:19,484 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 07:30:19,485 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:19,485 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:30:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 07:30:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-03-19 07:30:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-03-19 07:30:19,493 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2022-03-19 07:30:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:19,494 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-03-19 07:30:19,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-03-19 07:30:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-19 07:30:19,495 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:19,495 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:19,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:19,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:19,708 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 1 times [2022-03-19 07:30:19,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:19,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1443078713] [2022-03-19 07:30:19,710 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:19,710 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:19,710 INFO L85 PathProgramCache]: Analyzing trace with hash -685987020, now seen corresponding path program 2 times [2022-03-19 07:30:19,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:19,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537157550] [2022-03-19 07:30:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:19,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:19,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:30:19,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537157550] [2022-03-19 07:30:19,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537157550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854999930] [2022-03-19 07:30:19,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:19,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:19,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:19,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:19,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 07:30:19,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:19,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:19,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 07:30:19,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:30:19,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 07:30:19,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854999930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:19,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 07:30:19,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-19 07:30:19,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:19,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1443078713] [2022-03-19 07:30:19,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1443078713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:19,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:19,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 07:30:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491054745] [2022-03-19 07:30:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:19,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 07:30:19,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:19,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 07:30:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 07:30:19,988 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:20,048 INFO L93 Difference]: Finished difference Result 99 states and 132 transitions. [2022-03-19 07:30:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 07:30:20,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-19 07:30:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:20,051 INFO L225 Difference]: With dead ends: 99 [2022-03-19 07:30:20,051 INFO L226 Difference]: Without dead ends: 70 [2022-03-19 07:30:20,052 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 07:30:20,053 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:20,053 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 85 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 07:30:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-19 07:30:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-03-19 07:30:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 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) [2022-03-19 07:30:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-03-19 07:30:20,063 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2022-03-19 07:30:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:20,063 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-03-19 07:30:20,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-03-19 07:30:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 07:30:20,064 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:20,064 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:20,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:20,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-19 07:30:20,290 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 1 times [2022-03-19 07:30:20,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:20,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [299735258] [2022-03-19 07:30:20,292 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:20,292 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1914524167, now seen corresponding path program 2 times [2022-03-19 07:30:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:20,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057638612] [2022-03-19 07:30:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:20,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:20,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 07:30:20,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057638612] [2022-03-19 07:30:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057638612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037118735] [2022-03-19 07:30:20,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:20,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:20,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:20,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:20,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 07:30:20,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:20,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:20,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 07:30:20,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 07:30:20,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 07:30:20,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037118735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:20,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 07:30:20,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-03-19 07:30:20,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:20,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [299735258] [2022-03-19 07:30:20,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [299735258] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:20,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:20,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 07:30:20,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50914028] [2022-03-19 07:30:20,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:20,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 07:30:20,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:20,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 07:30:20,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-19 07:30:20,625 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:20,742 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-03-19 07:30:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:30:20,744 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-19 07:30:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:20,745 INFO L225 Difference]: With dead ends: 66 [2022-03-19 07:30:20,745 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 07:30:20,745 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-19 07:30:20,746 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:20,746 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 107 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:30:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 07:30:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-19 07:30:20,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-03-19 07:30:20,756 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2022-03-19 07:30:20,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:20,756 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-03-19 07:30:20,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-03-19 07:30:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 07:30:20,757 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:20,757 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:20,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:20,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:20,980 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:20,980 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 1 times [2022-03-19 07:30:20,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:20,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2055235471] [2022-03-19 07:30:20,982 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:20,982 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:20,982 INFO L85 PathProgramCache]: Analyzing trace with hash 109377679, now seen corresponding path program 2 times [2022-03-19 07:30:20,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:20,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639662824] [2022-03-19 07:30:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:20,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:21,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:30:21,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:21,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639662824] [2022-03-19 07:30:21,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639662824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:21,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694309139] [2022-03-19 07:30:21,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:21,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:21,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:21,065 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:21,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 07:30:21,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:21,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:21,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:21,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 07:30:21,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:21,401 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:21,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 07:30:21,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694309139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:21,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:21,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 15 [2022-03-19 07:30:21,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:21,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2055235471] [2022-03-19 07:30:21,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2055235471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:21,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:21,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:30:21,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165212482] [2022-03-19 07:30:21,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:21,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 07:30:21,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:21,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 07:30:21,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-19 07:30:21,445 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:21,576 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2022-03-19 07:30:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:30:21,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-19 07:30:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:21,577 INFO L225 Difference]: With dead ends: 130 [2022-03-19 07:30:21,577 INFO L226 Difference]: Without dead ends: 95 [2022-03-19 07:30:21,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:30:21,579 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:21,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 34 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:30:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-19 07:30:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 46. [2022-03-19 07:30:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 41 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-03-19 07:30:21,592 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2022-03-19 07:30:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:21,593 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-03-19 07:30:21,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-03-19 07:30:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 07:30:21,594 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:21,594 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:21,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:21,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:21,812 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:21,812 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 3 times [2022-03-19 07:30:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:21,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [91196497] [2022-03-19 07:30:21,814 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:21,815 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -951792659, now seen corresponding path program 4 times [2022-03-19 07:30:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:21,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883498583] [2022-03-19 07:30:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:21,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:21,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:30:21,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:21,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883498583] [2022-03-19 07:30:21,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883498583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:21,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664032662] [2022-03-19 07:30:21,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:30:21,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:21,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:21,916 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:21,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 07:30:21,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:30:21,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:21,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:22,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 07:30:22,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:22,228 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:22,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 07:30:22,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664032662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:22,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:22,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2022-03-19 07:30:22,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [91196497] [2022-03-19 07:30:22,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [91196497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:22,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:22,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:30:22,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344027854] [2022-03-19 07:30:22,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:22,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 07:30:22,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 07:30:22,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 07:30:22,262 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:22,432 INFO L93 Difference]: Finished difference Result 157 states and 213 transitions. [2022-03-19 07:30:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 07:30:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 07:30:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:22,434 INFO L225 Difference]: With dead ends: 157 [2022-03-19 07:30:22,434 INFO L226 Difference]: Without dead ends: 122 [2022-03-19 07:30:22,434 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-19 07:30:22,435 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 144 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:22,435 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 51 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:30:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-19 07:30:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 48. [2022-03-19 07:30:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:22,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-03-19 07:30:22,448 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 31 [2022-03-19 07:30:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:22,448 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-03-19 07:30:22,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-03-19 07:30:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 07:30:22,449 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:22,449 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:22,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:22,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:22,673 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:22,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 5 times [2022-03-19 07:30:22,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:22,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1237769512] [2022-03-19 07:30:22,675 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:22,675 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:22,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1465728971, now seen corresponding path program 6 times [2022-03-19 07:30:22,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:22,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714338502] [2022-03-19 07:30:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:22,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:22,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:30:22,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714338502] [2022-03-19 07:30:22,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714338502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084371947] [2022-03-19 07:30:22,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:30:22,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:22,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:22,764 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:22,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 07:30:22,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:30:22,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:22,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:22,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 07:30:22,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:23,068 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:23,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-19 07:30:23,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084371947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:23,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:23,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2022-03-19 07:30:23,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:23,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1237769512] [2022-03-19 07:30:23,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1237769512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:23,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:23,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:30:23,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349263545] [2022-03-19 07:30:23,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:23,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 07:30:23,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:23,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 07:30:23,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:30:23,111 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:23,351 INFO L93 Difference]: Finished difference Result 184 states and 251 transitions. [2022-03-19 07:30:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 07:30:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 07:30:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:23,353 INFO L225 Difference]: With dead ends: 184 [2022-03-19 07:30:23,353 INFO L226 Difference]: Without dead ends: 149 [2022-03-19 07:30:23,354 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:30:23,355 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 192 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:23,355 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 63 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:30:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-19 07:30:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 50. [2022-03-19 07:30:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-03-19 07:30:23,374 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 33 [2022-03-19 07:30:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:23,374 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-03-19 07:30:23,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-03-19 07:30:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 07:30:23,376 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:23,376 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:23,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-19 07:30:23,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:23,600 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:23,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 7 times [2022-03-19 07:30:23,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:23,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [72464734] [2022-03-19 07:30:23,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:23,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:23,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1126708265, now seen corresponding path program 8 times [2022-03-19 07:30:23,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:23,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850921212] [2022-03-19 07:30:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:23,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:30:23,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:23,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850921212] [2022-03-19 07:30:23,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850921212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:23,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577991418] [2022-03-19 07:30:23,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:23,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:23,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:23,691 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:23,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 07:30:23,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:23,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:23,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:23,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:23,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 07:30:23,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:23,976 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:23,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 07:30:24,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577991418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:24,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:24,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-03-19 07:30:24,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:24,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [72464734] [2022-03-19 07:30:24,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [72464734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:24,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:24,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 07:30:24,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994257317] [2022-03-19 07:30:24,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:24,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 07:30:24,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 07:30:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:30:24,013 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:24,349 INFO L93 Difference]: Finished difference Result 211 states and 289 transitions. [2022-03-19 07:30:24,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:30:24,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-19 07:30:24,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:24,351 INFO L225 Difference]: With dead ends: 211 [2022-03-19 07:30:24,351 INFO L226 Difference]: Without dead ends: 176 [2022-03-19 07:30:24,352 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:30:24,356 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 255 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:24,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 70 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:30:24,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-19 07:30:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 52. [2022-03-19 07:30:24,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-03-19 07:30:24,380 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 35 [2022-03-19 07:30:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:24,381 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-03-19 07:30:24,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-03-19 07:30:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 07:30:24,386 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:24,386 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:24,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:24,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:24,604 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 9 times [2022-03-19 07:30:24,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:24,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1526706993] [2022-03-19 07:30:24,605 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:24,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1745324295, now seen corresponding path program 10 times [2022-03-19 07:30:24,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:24,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436456600] [2022-03-19 07:30:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:24,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:24,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:30:24,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:24,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436456600] [2022-03-19 07:30:24,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436456600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:24,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877220065] [2022-03-19 07:30:24,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:30:24,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:24,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:24,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:24,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 07:30:24,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:30:24,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:24,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-19 07:30:24,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:25,039 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:25,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-19 07:30:25,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877220065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:25,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:25,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-03-19 07:30:25,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:25,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1526706993] [2022-03-19 07:30:25,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1526706993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:25,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:25,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 07:30:25,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486179285] [2022-03-19 07:30:25,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:25,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 07:30:25,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:25,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 07:30:25,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-19 07:30:25,073 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:25,514 INFO L93 Difference]: Finished difference Result 238 states and 327 transitions. [2022-03-19 07:30:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 07:30:25,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-19 07:30:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:25,515 INFO L225 Difference]: With dead ends: 238 [2022-03-19 07:30:25,515 INFO L226 Difference]: Without dead ends: 203 [2022-03-19 07:30:25,516 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:30:25,517 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 303 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:25,517 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 82 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:30:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-19 07:30:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 54. [2022-03-19 07:30:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-03-19 07:30:25,531 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 37 [2022-03-19 07:30:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:25,531 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-03-19 07:30:25,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-03-19 07:30:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 07:30:25,532 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:25,532 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:25,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:25,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 07:30:25,752 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 11 times [2022-03-19 07:30:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:25,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2055932170] [2022-03-19 07:30:25,753 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:25,753 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:25,754 INFO L85 PathProgramCache]: Analyzing trace with hash -765125019, now seen corresponding path program 12 times [2022-03-19 07:30:25,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:25,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731371800] [2022-03-19 07:30:25,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:25,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:25,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:30:25,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:25,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731371800] [2022-03-19 07:30:25,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731371800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:25,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766127624] [2022-03-19 07:30:25,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:30:25,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:25,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:25,857 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:25,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 07:30:25,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:30:25,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:25,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:25,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:26,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 07:30:26,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:26,162 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:26,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-19 07:30:26,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766127624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:26,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:26,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 20 [2022-03-19 07:30:26,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:26,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2055932170] [2022-03-19 07:30:26,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2055932170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:26,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:26,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 07:30:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535290726] [2022-03-19 07:30:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:26,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 07:30:26,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:26,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 07:30:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-19 07:30:26,204 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:26,767 INFO L93 Difference]: Finished difference Result 265 states and 365 transitions. [2022-03-19 07:30:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 07:30:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 07:30:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:26,769 INFO L225 Difference]: With dead ends: 265 [2022-03-19 07:30:26,769 INFO L226 Difference]: Without dead ends: 230 [2022-03-19 07:30:26,770 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-19 07:30:26,771 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 351 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:26,771 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 94 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:30:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-19 07:30:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 56. [2022-03-19 07:30:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:26,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-03-19 07:30:26,790 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 39 [2022-03-19 07:30:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:26,790 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-03-19 07:30:26,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-03-19 07:30:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 07:30:26,791 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:26,791 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:26,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:27,008 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:27,008 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 13 times [2022-03-19 07:30:27,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:27,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1853723975] [2022-03-19 07:30:27,010 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:27,010 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:27,010 INFO L85 PathProgramCache]: Analyzing trace with hash 464704579, now seen corresponding path program 14 times [2022-03-19 07:30:27,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:27,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503263534] [2022-03-19 07:30:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:27,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:27,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:30:27,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:27,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503263534] [2022-03-19 07:30:27,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503263534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:27,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464819563] [2022-03-19 07:30:27,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:27,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:27,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:27,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:27,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 07:30:27,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:27,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:27,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:27,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:27,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-19 07:30:27,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:27,468 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:27,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-03-19 07:30:27,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464819563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:27,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:27,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-03-19 07:30:27,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1853723975] [2022-03-19 07:30:27,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1853723975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:27,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:27,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 07:30:27,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189521567] [2022-03-19 07:30:27,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:27,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 07:30:27,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:27,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 07:30:27,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:30:27,516 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:28,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:28,231 INFO L93 Difference]: Finished difference Result 292 states and 403 transitions. [2022-03-19 07:30:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 07:30:28,232 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-19 07:30:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:28,233 INFO L225 Difference]: With dead ends: 292 [2022-03-19 07:30:28,233 INFO L226 Difference]: Without dead ends: 257 [2022-03-19 07:30:28,234 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-19 07:30:28,235 INFO L912 BasicCegarLoop]: 99 mSDtfsCounter, 294 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:28,235 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 141 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:30:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-19 07:30:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 58. [2022-03-19 07:30:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-03-19 07:30:28,253 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 41 [2022-03-19 07:30:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:28,253 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-03-19 07:30:28,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-03-19 07:30:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 07:30:28,254 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:28,254 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:28,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-19 07:30:28,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 07:30:28,459 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 15 times [2022-03-19 07:30:28,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:28,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [782286548] [2022-03-19 07:30:28,461 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:28,461 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:28,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1214941857, now seen corresponding path program 16 times [2022-03-19 07:30:28,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:28,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626697520] [2022-03-19 07:30:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:28,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:30:28,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:28,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626697520] [2022-03-19 07:30:28,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626697520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:28,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308271425] [2022-03-19 07:30:28,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:30:28,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:28,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:28,604 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:28,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 07:30:28,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:30:28,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:28,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:28,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:28,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 07:30:28,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:28,928 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:28,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 07:30:28,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308271425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:28,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:28,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-03-19 07:30:28,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:28,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [782286548] [2022-03-19 07:30:28,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [782286548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:28,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:28,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:30:28,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031078355] [2022-03-19 07:30:28,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:28,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:30:28,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:28,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:30:28,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-19 07:30:28,973 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:29,824 INFO L93 Difference]: Finished difference Result 319 states and 441 transitions. [2022-03-19 07:30:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:30:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-19 07:30:29,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:29,826 INFO L225 Difference]: With dead ends: 319 [2022-03-19 07:30:29,826 INFO L226 Difference]: Without dead ends: 284 [2022-03-19 07:30:29,827 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-19 07:30:29,828 INFO L912 BasicCegarLoop]: 111 mSDtfsCounter, 327 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:29,828 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 158 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:30:29,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-19 07:30:29,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 60. [2022-03-19 07:30:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-03-19 07:30:29,846 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 43 [2022-03-19 07:30:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:29,847 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-03-19 07:30:29,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-03-19 07:30:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 07:30:29,847 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:29,847 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:29,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-19 07:30:30,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 07:30:30,057 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:30,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:30,058 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 17 times [2022-03-19 07:30:30,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:30,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [756244671] [2022-03-19 07:30:30,059 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:30,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash 638460287, now seen corresponding path program 18 times [2022-03-19 07:30:30,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:30,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662226720] [2022-03-19 07:30:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:30,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 07:30:30,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:30,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662226720] [2022-03-19 07:30:30,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662226720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:30,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379762854] [2022-03-19 07:30:30,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:30:30,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:30,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:30,228 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:30,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 07:30:30,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:30:30,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:30,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:30,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-19 07:30:30,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:30,580 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:30,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-03-19 07:30:30,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379762854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:30,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:30,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 23 [2022-03-19 07:30:30,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:30,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [756244671] [2022-03-19 07:30:30,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [756244671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:30,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:30,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:30:30,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459235488] [2022-03-19 07:30:30,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:30,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:30:30,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:30,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:30:30,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:30:30,629 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:31,572 INFO L93 Difference]: Finished difference Result 346 states and 479 transitions. [2022-03-19 07:30:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:30:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-19 07:30:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:31,575 INFO L225 Difference]: With dead ends: 346 [2022-03-19 07:30:31,575 INFO L226 Difference]: Without dead ends: 311 [2022-03-19 07:30:31,576 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 07:30:31,576 INFO L912 BasicCegarLoop]: 123 mSDtfsCounter, 405 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:31,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 160 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 07:30:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-19 07:30:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 62. [2022-03-19 07:30:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-03-19 07:30:31,599 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 45 [2022-03-19 07:30:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:31,599 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-03-19 07:30:31,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-03-19 07:30:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 07:30:31,600 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:31,600 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:31,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:31,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 07:30:31,803 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:31,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:31,804 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 19 times [2022-03-19 07:30:31,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:31,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [313909440] [2022-03-19 07:30:31,805 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:31,805 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash 690452701, now seen corresponding path program 20 times [2022-03-19 07:30:31,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:31,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179447323] [2022-03-19 07:30:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:31,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:31,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:31,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:31,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179447323] [2022-03-19 07:30:31,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179447323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:31,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786454248] [2022-03-19 07:30:31,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:31,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:31,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:31,860 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) [2022-03-19 07:30:31,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 07:30:31,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:31,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:31,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:32,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:32,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:32,166 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:32,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:32,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786454248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:32,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:32,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 15 [2022-03-19 07:30:32,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:32,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [313909440] [2022-03-19 07:30:32,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [313909440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:32,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:32,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 07:30:32,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806351506] [2022-03-19 07:30:32,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:32,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 07:30:32,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:32,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 07:30:32,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-19 07:30:32,202 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:32,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:32,304 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-03-19 07:30:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 07:30:32,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-19 07:30:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:32,305 INFO L225 Difference]: With dead ends: 115 [2022-03-19 07:30:32,305 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 07:30:32,305 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:30:32,306 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:32,319 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:30:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 07:30:32,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-03-19 07:30:32,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2022-03-19 07:30:32,346 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 47 [2022-03-19 07:30:32,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:32,346 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2022-03-19 07:30:32,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:32,346 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2022-03-19 07:30:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 07:30:32,347 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:32,347 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:32,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-19 07:30:32,547 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,SelfDestructingSolverStorable14 [2022-03-19 07:30:32,547 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 21 times [2022-03-19 07:30:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:32,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1428766486] [2022-03-19 07:30:32,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:32,549 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:32,549 INFO L85 PathProgramCache]: Analyzing trace with hash -644212742, now seen corresponding path program 22 times [2022-03-19 07:30:32,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:32,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749668438] [2022-03-19 07:30:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:32,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:32,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:32,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:32,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749668438] [2022-03-19 07:30:32,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749668438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:32,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201923773] [2022-03-19 07:30:32,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:30:32,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:32,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:32,639 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) [2022-03-19 07:30:32,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 07:30:32,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:30:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:32,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:32,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-19 07:30:32,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:32,949 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:32,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-19 07:30:32,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201923773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:32,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:32,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2022-03-19 07:30:32,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:32,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1428766486] [2022-03-19 07:30:32,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1428766486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:32,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:32,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 07:30:32,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368055687] [2022-03-19 07:30:32,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:32,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 07:30:32,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:32,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 07:30:32,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-19 07:30:32,986 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2022-03-19 07:30:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:33,101 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-03-19 07:30:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 07:30:33,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 50 [2022-03-19 07:30:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:33,102 INFO L225 Difference]: With dead ends: 143 [2022-03-19 07:30:33,102 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 07:30:33,103 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-19 07:30:33,103 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:33,103 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:30:33,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 07:30:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-03-19 07:30:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 85 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2022-03-19 07:30:33,134 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 50 [2022-03-19 07:30:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:33,135 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2022-03-19 07:30:33,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2022-03-19 07:30:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2022-03-19 07:30:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 07:30:33,135 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:33,135 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:33,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:33,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:33,336 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:33,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 23 times [2022-03-19 07:30:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:33,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1746528750] [2022-03-19 07:30:33,337 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:33,337 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1144801213, now seen corresponding path program 24 times [2022-03-19 07:30:33,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:33,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569466870] [2022-03-19 07:30:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:33,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:33,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:33,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:33,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569466870] [2022-03-19 07:30:33,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569466870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:33,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437233122] [2022-03-19 07:30:33,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:30:33,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:33,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:33,423 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) [2022-03-19 07:30:33,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 07:30:33,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:30:33,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:33,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:33,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-19 07:30:33,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:33,745 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:33,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-19 07:30:33,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437233122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:33,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:33,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2022-03-19 07:30:33,785 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:33,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1746528750] [2022-03-19 07:30:33,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1746528750] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:33,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:33,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:30:33,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165519320] [2022-03-19 07:30:33,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:33,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 07:30:33,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 07:30:33,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:30:33,787 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:33,931 INFO L93 Difference]: Finished difference Result 167 states and 217 transitions. [2022-03-19 07:30:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 07:30:33,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have 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 [2022-03-19 07:30:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:33,932 INFO L225 Difference]: With dead ends: 167 [2022-03-19 07:30:33,932 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 07:30:33,932 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:30:33,933 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:33,933 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 52 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:30:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 07:30:33,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2022-03-19 07:30:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 97 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-03-19 07:30:33,975 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 53 [2022-03-19 07:30:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:33,975 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-03-19 07:30:33,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-03-19 07:30:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 07:30:33,976 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:33,976 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:34,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:34,199 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,SelfDestructingSolverStorable16 [2022-03-19 07:30:34,200 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 25 times [2022-03-19 07:30:34,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:34,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [117849436] [2022-03-19 07:30:34,201 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:34,201 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1410358554, now seen corresponding path program 26 times [2022-03-19 07:30:34,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:34,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795186721] [2022-03-19 07:30:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:34,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:34,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:34,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795186721] [2022-03-19 07:30:34,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795186721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:34,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887700598] [2022-03-19 07:30:34,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:34,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:34,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:34,296 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) [2022-03-19 07:30:34,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 07:30:34,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:34,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:34,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:34,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:34,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-19 07:30:34,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:34,677 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:34,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-19 07:30:34,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887700598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:34,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:34,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-03-19 07:30:34,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:34,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [117849436] [2022-03-19 07:30:34,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [117849436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:34,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:34,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 07:30:34,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359094268] [2022-03-19 07:30:34,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:34,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 07:30:34,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:34,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 07:30:34,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:30:34,718 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2022-03-19 07:30:34,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:34,892 INFO L93 Difference]: Finished difference Result 191 states and 249 transitions. [2022-03-19 07:30:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:30:34,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-19 07:30:34,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:34,893 INFO L225 Difference]: With dead ends: 191 [2022-03-19 07:30:34,893 INFO L226 Difference]: Without dead ends: 122 [2022-03-19 07:30:34,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:30:34,894 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:34,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 56 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:30:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-19 07:30:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2022-03-19 07:30:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2660550458715596) internal successors, (138), 109 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) [2022-03-19 07:30:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 142 transitions. [2022-03-19 07:30:34,934 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 142 transitions. Word has length 56 [2022-03-19 07:30:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:34,934 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 142 transitions. [2022-03-19 07:30:34,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 142 transitions. [2022-03-19 07:30:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 07:30:34,935 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:34,935 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:34,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:35,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 07:30:35,140 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 27 times [2022-03-19 07:30:35,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:35,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546000924] [2022-03-19 07:30:35,141 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:35,141 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1299345053, now seen corresponding path program 28 times [2022-03-19 07:30:35,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:35,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022775662] [2022-03-19 07:30:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:35,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:35,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:35,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:35,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022775662] [2022-03-19 07:30:35,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022775662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:35,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401365154] [2022-03-19 07:30:35,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:30:35,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:35,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:35,255 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) [2022-03-19 07:30:35,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 07:30:35,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:30:35,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:35,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:35,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:35,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-19 07:30:35,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:35,639 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:35,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-19 07:30:35,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401365154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:35,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:35,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-03-19 07:30:35,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:35,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546000924] [2022-03-19 07:30:35,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546000924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:35,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:35,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 07:30:35,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548130619] [2022-03-19 07:30:35,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:35,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 07:30:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 07:30:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-03-19 07:30:35,681 INFO L87 Difference]: Start difference. First operand 114 states and 142 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:35,921 INFO L93 Difference]: Finished difference Result 215 states and 281 transitions. [2022-03-19 07:30:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 07:30:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-19 07:30:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:35,922 INFO L225 Difference]: With dead ends: 215 [2022-03-19 07:30:35,922 INFO L226 Difference]: Without dead ends: 134 [2022-03-19 07:30:35,923 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:30:35,923 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 102 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:35,924 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 80 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:30:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-19 07:30:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2022-03-19 07:30:35,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 121 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 158 transitions. [2022-03-19 07:30:35,983 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 158 transitions. Word has length 59 [2022-03-19 07:30:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:35,983 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 158 transitions. [2022-03-19 07:30:35,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 158 transitions. [2022-03-19 07:30:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 07:30:35,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:35,984 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:36,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-19 07:30:36,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:36,186 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:36,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 29 times [2022-03-19 07:30:36,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:36,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1594122910] [2022-03-19 07:30:36,187 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:36,187 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1220954682, now seen corresponding path program 30 times [2022-03-19 07:30:36,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:36,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036248051] [2022-03-19 07:30:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:36,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:36,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:36,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:36,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036248051] [2022-03-19 07:30:36,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036248051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:36,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286195384] [2022-03-19 07:30:36,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:30:36,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:36,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:36,303 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) [2022-03-19 07:30:36,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 07:30:36,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:30:36,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:36,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:36,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:36,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-19 07:30:36,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:36,714 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:36,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-19 07:30:36,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286195384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:36,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:36,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 20 [2022-03-19 07:30:36,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1594122910] [2022-03-19 07:30:36,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1594122910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:36,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:36,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 07:30:36,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760536929] [2022-03-19 07:30:36,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:36,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 07:30:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 07:30:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-19 07:30:36,753 INFO L87 Difference]: Start difference. First operand 126 states and 158 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2022-03-19 07:30:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:37,057 INFO L93 Difference]: Finished difference Result 239 states and 313 transitions. [2022-03-19 07:30:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 07:30:37,057 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 62 [2022-03-19 07:30:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:37,058 INFO L225 Difference]: With dead ends: 239 [2022-03-19 07:30:37,058 INFO L226 Difference]: Without dead ends: 146 [2022-03-19 07:30:37,058 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-19 07:30:37,059 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:37,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 79 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:30:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-19 07:30:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-03-19 07:30:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.2781954887218046) internal successors, (170), 133 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2022-03-19 07:30:37,113 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 62 [2022-03-19 07:30:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:37,113 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2022-03-19 07:30:37,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2022-03-19 07:30:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2022-03-19 07:30:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-19 07:30:37,114 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:37,114 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:37,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-19 07:30:37,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:37,321 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:37,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 31 times [2022-03-19 07:30:37,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:37,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [735226386] [2022-03-19 07:30:37,322 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:37,323 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:37,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1939346051, now seen corresponding path program 32 times [2022-03-19 07:30:37,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:37,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295498256] [2022-03-19 07:30:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:37,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:37,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:37,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295498256] [2022-03-19 07:30:37,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295498256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:37,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100999312] [2022-03-19 07:30:37,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:37,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:37,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:37,460 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) [2022-03-19 07:30:37,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 07:30:37,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:37,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:37,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:37,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:37,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-03-19 07:30:37,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:37,961 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:37,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-03-19 07:30:38,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100999312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:38,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:38,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-03-19 07:30:38,011 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:38,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [735226386] [2022-03-19 07:30:38,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [735226386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:38,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:38,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 07:30:38,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973187590] [2022-03-19 07:30:38,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:38,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 07:30:38,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:38,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 07:30:38,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:30:38,013 INFO L87 Difference]: Start difference. First operand 138 states and 174 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:38,376 INFO L93 Difference]: Finished difference Result 263 states and 345 transitions. [2022-03-19 07:30:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 07:30:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-19 07:30:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:38,385 INFO L225 Difference]: With dead ends: 263 [2022-03-19 07:30:38,385 INFO L226 Difference]: Without dead ends: 158 [2022-03-19 07:30:38,386 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-03-19 07:30:38,387 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 146 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:38,387 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 73 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:30:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-19 07:30:38,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-03-19 07:30:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.282758620689655) internal successors, (186), 145 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) [2022-03-19 07:30:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 190 transitions. [2022-03-19 07:30:38,473 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 190 transitions. Word has length 65 [2022-03-19 07:30:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:38,473 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 190 transitions. [2022-03-19 07:30:38,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 190 transitions. [2022-03-19 07:30:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:38,474 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:38,474 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:38,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:38,701 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:38,701 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 33 times [2022-03-19 07:30:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:38,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [85656168] [2022-03-19 07:30:38,703 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:38,703 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:38,703 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 34 times [2022-03-19 07:30:38,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:38,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160776867] [2022-03-19 07:30:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:39,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:39,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:39,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160776867] [2022-03-19 07:30:39,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160776867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:39,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209505291] [2022-03-19 07:30:39,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:30:39,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:39,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:39,204 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) [2022-03-19 07:30:39,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 07:30:39,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:30:39,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:39,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:39,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:39,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:39,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:39,753 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:39,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:39,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209505291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:39,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:39,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-03-19 07:30:39,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:39,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [85656168] [2022-03-19 07:30:39,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [85656168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:39,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:39,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:30:39,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721226437] [2022-03-19 07:30:39,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:39,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:30:39,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:39,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:30:39,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:30:39,811 INFO L87 Difference]: Start difference. First operand 150 states and 190 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-03-19 07:30:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:40,696 INFO L93 Difference]: Finished difference Result 224 states and 287 transitions. [2022-03-19 07:30:40,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:30:40,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 68 [2022-03-19 07:30:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:40,697 INFO L225 Difference]: With dead ends: 224 [2022-03-19 07:30:40,697 INFO L226 Difference]: Without dead ends: 163 [2022-03-19 07:30:40,698 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:30:40,698 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 165 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:40,698 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 79 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:30:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-19 07:30:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-03-19 07:30:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2802547770700636) internal successors, (201), 157 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) [2022-03-19 07:30:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 205 transitions. [2022-03-19 07:30:40,819 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 205 transitions. Word has length 68 [2022-03-19 07:30:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:40,819 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 205 transitions. [2022-03-19 07:30:40,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-03-19 07:30:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 205 transitions. [2022-03-19 07:30:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:40,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:40,820 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:40,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:41,031 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,SelfDestructingSolverStorable21 [2022-03-19 07:30:41,031 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash -222221800, now seen corresponding path program 1 times [2022-03-19 07:30:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:41,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1466750369] [2022-03-19 07:30:41,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:41,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash -222221800, now seen corresponding path program 2 times [2022-03-19 07:30:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567274161] [2022-03-19 07:30:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:41,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-19 07:30:41,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:41,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567274161] [2022-03-19 07:30:41,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567274161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:41,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913945155] [2022-03-19 07:30:41,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:41,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:41,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:41,422 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) [2022-03-19 07:30:41,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 07:30:41,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:41,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:41,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:41,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:41,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:41,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:41,888 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:41,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:41,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913945155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:41,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:41,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-03-19 07:30:41,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:41,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1466750369] [2022-03-19 07:30:41,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1466750369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:41,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:41,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:30:41,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898111394] [2022-03-19 07:30:41,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:41,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:30:41,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:41,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:30:41,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-19 07:30:41,933 INFO L87 Difference]: Start difference. First operand 162 states and 205 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2022-03-19 07:30:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:42,449 INFO L93 Difference]: Finished difference Result 235 states and 300 transitions. [2022-03-19 07:30:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:30:42,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 68 [2022-03-19 07:30:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:42,451 INFO L225 Difference]: With dead ends: 235 [2022-03-19 07:30:42,451 INFO L226 Difference]: Without dead ends: 162 [2022-03-19 07:30:42,451 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-19 07:30:42,455 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 92 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:42,455 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 77 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:30:42,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-19 07:30:42,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-03-19 07:30:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2738853503184713) internal successors, (200), 157 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:42,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2022-03-19 07:30:42,558 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 68 [2022-03-19 07:30:42,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:42,558 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2022-03-19 07:30:42,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2022-03-19 07:30:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2022-03-19 07:30:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:42,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:42,559 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:42,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:42,764 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,SelfDestructingSolverStorable22 [2022-03-19 07:30:42,764 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash 200480026, now seen corresponding path program 3 times [2022-03-19 07:30:42,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:42,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1169668212] [2022-03-19 07:30:42,766 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:42,766 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:42,766 INFO L85 PathProgramCache]: Analyzing trace with hash 200480026, now seen corresponding path program 4 times [2022-03-19 07:30:42,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:42,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696043842] [2022-03-19 07:30:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:43,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-19 07:30:43,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696043842] [2022-03-19 07:30:43,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696043842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959507122] [2022-03-19 07:30:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:30:43,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:43,206 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 07:30:43,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 07:30:43,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:30:43,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:43,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:43,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:43,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:43,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:43,796 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:43,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:43,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959507122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:43,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:43,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-19 07:30:43,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:43,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1169668212] [2022-03-19 07:30:43,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1169668212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:43,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:43,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:30:43,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477981883] [2022-03-19 07:30:43,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:43,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:30:43,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:30:43,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:30:43,852 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:44,531 INFO L93 Difference]: Finished difference Result 235 states and 298 transitions. [2022-03-19 07:30:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:30:44,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:30:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:44,536 INFO L225 Difference]: With dead ends: 235 [2022-03-19 07:30:44,536 INFO L226 Difference]: Without dead ends: 162 [2022-03-19 07:30:44,537 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:30:44,537 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:44,538 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 84 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:30:44,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-19 07:30:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-03-19 07:30:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.267515923566879) internal successors, (199), 157 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2022-03-19 07:30:44,685 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 68 [2022-03-19 07:30:44,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:44,685 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2022-03-19 07:30:44,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:44,685 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2022-03-19 07:30:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:44,686 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:44,686 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:44,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:44,908 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:44,908 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:44,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:44,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1079383652, now seen corresponding path program 5 times [2022-03-19 07:30:44,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:44,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113146932] [2022-03-19 07:30:44,909 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:44,909 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1079383652, now seen corresponding path program 6 times [2022-03-19 07:30:44,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:44,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312966324] [2022-03-19 07:30:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:44,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:45,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-19 07:30:45,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:45,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312966324] [2022-03-19 07:30:45,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312966324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:45,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241540069] [2022-03-19 07:30:45,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:30:45,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:45,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:45,276 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) [2022-03-19 07:30:45,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 07:30:45,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:30:45,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:45,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:45,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:45,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:45,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:45,794 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:45,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:45,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241540069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:45,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:45,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 23 [2022-03-19 07:30:45,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:45,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113146932] [2022-03-19 07:30:45,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113146932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:45,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:45,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:30:45,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003988494] [2022-03-19 07:30:45,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:45,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:30:45,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:45,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:30:45,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:30:45,847 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:46,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:46,367 INFO L93 Difference]: Finished difference Result 235 states and 296 transitions. [2022-03-19 07:30:46,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:30:46,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:30:46,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:46,368 INFO L225 Difference]: With dead ends: 235 [2022-03-19 07:30:46,368 INFO L226 Difference]: Without dead ends: 162 [2022-03-19 07:30:46,369 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 07:30:46,369 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:46,369 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 78 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:30:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-19 07:30:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-03-19 07:30:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2611464968152866) internal successors, (198), 157 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) [2022-03-19 07:30:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2022-03-19 07:30:46,482 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 68 [2022-03-19 07:30:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:46,483 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2022-03-19 07:30:46,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2022-03-19 07:30:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:46,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:46,488 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:46,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:46,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:46,703 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:46,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1221438938, now seen corresponding path program 7 times [2022-03-19 07:30:46,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:46,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179856427] [2022-03-19 07:30:46,704 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:46,704 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1221438938, now seen corresponding path program 8 times [2022-03-19 07:30:46,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:46,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621097896] [2022-03-19 07:30:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:46,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:47,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 07:30:47,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621097896] [2022-03-19 07:30:47,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621097896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118071685] [2022-03-19 07:30:47,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:47,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:47,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:47,191 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) [2022-03-19 07:30:47,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 07:30:47,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:47,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:47,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:47,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:47,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:47,685 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:47,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:47,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118071685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:47,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:47,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-03-19 07:30:47,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179856427] [2022-03-19 07:30:47,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179856427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:47,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:47,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 07:30:47,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880452314] [2022-03-19 07:30:47,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:47,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 07:30:47,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:47,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 07:30:47,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-19 07:30:47,727 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2022-03-19 07:30:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:48,199 INFO L93 Difference]: Finished difference Result 242 states and 303 transitions. [2022-03-19 07:30:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 07:30:48,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 68 [2022-03-19 07:30:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:48,201 INFO L225 Difference]: With dead ends: 242 [2022-03-19 07:30:48,201 INFO L226 Difference]: Without dead ends: 169 [2022-03-19 07:30:48,201 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-19 07:30:48,202 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 77 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:48,202 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 63 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:30:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-19 07:30:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-03-19 07:30:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 163 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2022-03-19 07:30:48,324 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 68 [2022-03-19 07:30:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:48,324 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2022-03-19 07:30:48,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2022-03-19 07:30:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2022-03-19 07:30:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:48,325 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:48,325 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:48,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:48,549 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,SelfDestructingSolverStorable25 [2022-03-19 07:30:48,549 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash -614400744, now seen corresponding path program 9 times [2022-03-19 07:30:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:48,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [487169825] [2022-03-19 07:30:48,551 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:48,551 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:48,551 INFO L85 PathProgramCache]: Analyzing trace with hash -614400744, now seen corresponding path program 10 times [2022-03-19 07:30:48,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:48,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679415754] [2022-03-19 07:30:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:48,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:48,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:48,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:48,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679415754] [2022-03-19 07:30:48,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679415754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:48,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350591294] [2022-03-19 07:30:48,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:30:48,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:48,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:48,920 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) [2022-03-19 07:30:48,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 07:30:49,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:30:49,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:49,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:49,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:49,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:49,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:49,411 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:49,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:49,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350591294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:49,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:49,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-03-19 07:30:49,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:49,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [487169825] [2022-03-19 07:30:49,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [487169825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:49,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:49,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:30:49,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58133485] [2022-03-19 07:30:49,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:49,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:30:49,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:49,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:30:49,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:30:49,461 INFO L87 Difference]: Start difference. First operand 168 states and 209 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-03-19 07:30:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:50,171 INFO L93 Difference]: Finished difference Result 254 states and 317 transitions. [2022-03-19 07:30:50,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:30:50,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 68 [2022-03-19 07:30:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:50,173 INFO L225 Difference]: With dead ends: 254 [2022-03-19 07:30:50,173 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 07:30:50,173 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:30:50,174 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 152 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:50,174 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 103 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:30:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 07:30:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-03-19 07:30:50,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2590361445783131) internal successors, (209), 166 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions. [2022-03-19 07:30:50,259 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 68 [2022-03-19 07:30:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:50,259 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions. [2022-03-19 07:30:50,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-03-19 07:30:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions. [2022-03-19 07:30:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:50,260 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:50,260 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:50,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:50,462 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,SelfDestructingSolverStorable26 [2022-03-19 07:30:50,462 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash -356235306, now seen corresponding path program 11 times [2022-03-19 07:30:50,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:50,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60981851] [2022-03-19 07:30:50,463 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:50,463 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash -356235306, now seen corresponding path program 12 times [2022-03-19 07:30:50,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:50,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203416173] [2022-03-19 07:30:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:50,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:50,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-19 07:30:50,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:50,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203416173] [2022-03-19 07:30:50,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203416173] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:50,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164479386] [2022-03-19 07:30:50,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:30:50,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:50,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:50,840 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) [2022-03-19 07:30:50,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 07:30:50,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:30:50,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:50,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:51,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:51,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:51,302 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:51,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:51,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164479386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:51,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:51,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-19 07:30:51,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:51,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60981851] [2022-03-19 07:30:51,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60981851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:51,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:51,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:30:51,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659697525] [2022-03-19 07:30:51,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:51,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:30:51,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:51,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:30:51,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:30:51,349 INFO L87 Difference]: Start difference. First operand 171 states and 213 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:51,987 INFO L93 Difference]: Finished difference Result 254 states and 317 transitions. [2022-03-19 07:30:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:30:51,987 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:30:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:51,988 INFO L225 Difference]: With dead ends: 254 [2022-03-19 07:30:51,988 INFO L226 Difference]: Without dead ends: 172 [2022-03-19 07:30:51,988 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:30:51,989 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 116 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:51,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 93 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:30:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-19 07:30:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2022-03-19 07:30:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 163 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2022-03-19 07:30:52,091 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 68 [2022-03-19 07:30:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:52,091 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2022-03-19 07:30:52,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2022-03-19 07:30:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:52,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:52,093 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:52,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-19 07:30:52,296 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,SelfDestructingSolverStorable27 [2022-03-19 07:30:52,297 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:52,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1636098984, now seen corresponding path program 13 times [2022-03-19 07:30:52,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:52,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1539252384] [2022-03-19 07:30:52,298 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:52,298 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1636098984, now seen corresponding path program 14 times [2022-03-19 07:30:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:52,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230634140] [2022-03-19 07:30:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:52,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:52,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-19 07:30:52,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:52,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230634140] [2022-03-19 07:30:52,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230634140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:52,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914037990] [2022-03-19 07:30:52,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:52,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:52,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:52,652 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) [2022-03-19 07:30:52,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 07:30:52,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:52,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:52,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:52,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:53,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:53,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:53,200 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:53,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:53,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914037990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:53,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:53,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-19 07:30:53,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1539252384] [2022-03-19 07:30:53,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1539252384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:53,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:53,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:30:53,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989305185] [2022-03-19 07:30:53,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:53,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:30:53,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:30:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:30:53,256 INFO L87 Difference]: Start difference. First operand 168 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2022-03-19 07:30:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:53,800 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2022-03-19 07:30:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:30:53,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 68 [2022-03-19 07:30:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:53,802 INFO L225 Difference]: With dead ends: 251 [2022-03-19 07:30:53,802 INFO L226 Difference]: Without dead ends: 172 [2022-03-19 07:30:53,802 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:30:53,803 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 131 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:53,803 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 77 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:30:53,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-19 07:30:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-03-19 07:30:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2022-03-19 07:30:53,894 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 68 [2022-03-19 07:30:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:53,894 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2022-03-19 07:30:53,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2022-03-19 07:30:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2022-03-19 07:30:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:53,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:53,895 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:53,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:54,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 07:30:54,105 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1686421846, now seen corresponding path program 15 times [2022-03-19 07:30:54,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:54,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [50952339] [2022-03-19 07:30:54,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:54,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:54,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1686421846, now seen corresponding path program 16 times [2022-03-19 07:30:54,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:54,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595596658] [2022-03-19 07:30:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:54,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:54,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:54,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:54,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595596658] [2022-03-19 07:30:54,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595596658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:54,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965280793] [2022-03-19 07:30:54,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:30:54,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:54,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:54,486 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) [2022-03-19 07:30:54,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 07:30:54,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:30:54,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:30:54,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:54,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:54,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:54,946 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:54,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:54,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965280793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:54,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:54,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 25 [2022-03-19 07:30:54,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:54,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [50952339] [2022-03-19 07:30:54,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [50952339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:54,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:54,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:30:54,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053305051] [2022-03-19 07:30:54,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:54,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:30:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:54,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:30:54,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:30:54,988 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2022-03-19 07:30:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:55,678 INFO L93 Difference]: Finished difference Result 257 states and 319 transitions. [2022-03-19 07:30:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:30:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 68 [2022-03-19 07:30:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:55,679 INFO L225 Difference]: With dead ends: 257 [2022-03-19 07:30:55,679 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 07:30:55,679 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:30:55,680 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 141 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:55,680 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 89 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:30:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 07:30:55,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2022-03-19 07:30:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2022-03-19 07:30:55,773 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 68 [2022-03-19 07:30:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:55,773 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2022-03-19 07:30:55,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2022-03-19 07:30:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2022-03-19 07:30:55,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:55,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:55,774 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:55,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 07:30:55,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:55,974 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:55,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1944587284, now seen corresponding path program 17 times [2022-03-19 07:30:55,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:55,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [45037354] [2022-03-19 07:30:55,976 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:55,976 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:55,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1944587284, now seen corresponding path program 18 times [2022-03-19 07:30:55,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:55,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123063323] [2022-03-19 07:30:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:55,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:56,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-19 07:30:56,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:56,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123063323] [2022-03-19 07:30:56,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123063323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:56,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031057731] [2022-03-19 07:30:56,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:30:56,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:56,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:56,348 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) [2022-03-19 07:30:56,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 07:30:56,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:30:56,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:56,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:56,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:56,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:56,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:56,821 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:56,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:56,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031057731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:56,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:56,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-19 07:30:56,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:56,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [45037354] [2022-03-19 07:30:56,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [45037354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:56,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:56,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:30:56,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362657122] [2022-03-19 07:30:56,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:56,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:30:56,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:30:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:30:56,863 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:57,435 INFO L93 Difference]: Finished difference Result 257 states and 319 transitions. [2022-03-19 07:30:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:30:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:30:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:57,436 INFO L225 Difference]: With dead ends: 257 [2022-03-19 07:30:57,436 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 07:30:57,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:30:57,437 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:57,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 70 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:30:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 07:30:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-19 07:30:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 169 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-03-19 07:30:57,532 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 68 [2022-03-19 07:30:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:57,532 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-03-19 07:30:57,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:57,532 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-03-19 07:30:57,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:57,533 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:57,533 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:57,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-19 07:30:57,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:57,733 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:57,734 INFO L85 PathProgramCache]: Analyzing trace with hash 406558168, now seen corresponding path program 19 times [2022-03-19 07:30:57,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:57,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [697261980] [2022-03-19 07:30:57,735 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:57,735 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash 406558168, now seen corresponding path program 20 times [2022-03-19 07:30:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:57,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688076292] [2022-03-19 07:30:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:57,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:58,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:30:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:30:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:30:58,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:30:58,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688076292] [2022-03-19 07:30:58,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688076292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:30:58,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609258205] [2022-03-19 07:30:58,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:30:58,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:30:58,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:30:58,080 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) [2022-03-19 07:30:58,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 07:30:58,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:30:58,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:30:58,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:30:58,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:30:58,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:30:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:58,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:30:58,548 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:30:58,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:30:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:30:58,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609258205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:30:58,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:30:58,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-03-19 07:30:58,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:30:58,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [697261980] [2022-03-19 07:30:58,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [697261980] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:30:58,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:30:58,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:30:58,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791804669] [2022-03-19 07:30:58,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:30:58,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:30:58,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:58,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:30:58,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:30:58,593 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-03-19 07:30:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:30:59,296 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-03-19 07:30:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:30:59,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 68 [2022-03-19 07:30:59,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:30:59,297 INFO L225 Difference]: With dead ends: 263 [2022-03-19 07:30:59,297 INFO L226 Difference]: Without dead ends: 178 [2022-03-19 07:30:59,297 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:30:59,298 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 133 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:30:59,298 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 95 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:30:59,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-19 07:30:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2022-03-19 07:30:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.2576687116564418) internal successors, (205), 163 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:30:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 209 transitions. [2022-03-19 07:30:59,397 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 209 transitions. Word has length 68 [2022-03-19 07:30:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:30:59,397 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 209 transitions. [2022-03-19 07:30:59,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-03-19 07:30:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 209 transitions. [2022-03-19 07:30:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:30:59,398 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:30:59,398 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:30:59,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-19 07:30:59,604 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,SelfDestructingSolverStorable31 [2022-03-19 07:30:59,605 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:30:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:30:59,605 INFO L85 PathProgramCache]: Analyzing trace with hash 664723606, now seen corresponding path program 21 times [2022-03-19 07:30:59,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:30:59,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390925927] [2022-03-19 07:30:59,606 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:30:59,606 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:30:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 664723606, now seen corresponding path program 22 times [2022-03-19 07:30:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:30:59,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866840436] [2022-03-19 07:30:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:30:59,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:30:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:00,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-19 07:31:00,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866840436] [2022-03-19 07:31:00,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866840436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:00,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424955126] [2022-03-19 07:31:00,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:31:00,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:00,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:00,028 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) [2022-03-19 07:31:00,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 07:31:00,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:31:00,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:31:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:00,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:00,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:00,491 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:31:00,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:31:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:00,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424955126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:00,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:00,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-03-19 07:31:00,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:00,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390925927] [2022-03-19 07:31:00,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390925927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:00,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:00,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:31:00,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859613533] [2022-03-19 07:31:00,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:00,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:31:00,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:00,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:31:00,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-19 07:31:00,545 INFO L87 Difference]: Start difference. First operand 168 states and 209 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:01,119 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2022-03-19 07:31:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:31:01,120 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:31:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:01,120 INFO L225 Difference]: With dead ends: 251 [2022-03-19 07:31:01,120 INFO L226 Difference]: Without dead ends: 172 [2022-03-19 07:31:01,121 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-03-19 07:31:01,121 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 82 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:01,121 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 64 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:31:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-19 07:31:01,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-03-19 07:31:01,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 212 transitions. [2022-03-19 07:31:01,209 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 212 transitions. Word has length 68 [2022-03-19 07:31:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:01,209 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 212 transitions. [2022-03-19 07:31:01,209 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 212 transitions. [2022-03-19 07:31:01,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:31:01,209 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:01,209 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:01,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-19 07:31:01,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:01,410 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:01,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:01,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1213397158, now seen corresponding path program 23 times [2022-03-19 07:31:01,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:01,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2117143205] [2022-03-19 07:31:01,411 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:01,412 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1213397158, now seen corresponding path program 24 times [2022-03-19 07:31:01,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:01,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959606075] [2022-03-19 07:31:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:01,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:01,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-19 07:31:01,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:01,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959606075] [2022-03-19 07:31:01,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959606075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382197904] [2022-03-19 07:31:01,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:31:01,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:01,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:01,816 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) [2022-03-19 07:31:01,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 07:31:01,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:31:01,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:01,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:31:01,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:02,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:02,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:02,278 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:31:02,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:31:02,320 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:02,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382197904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:02,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:02,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-19 07:31:02,321 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:02,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2117143205] [2022-03-19 07:31:02,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2117143205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:02,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:02,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:31:02,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69919671] [2022-03-19 07:31:02,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:02,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:31:02,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:02,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:31:02,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:31:02,322 INFO L87 Difference]: Start difference. First operand 171 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2022-03-19 07:31:02,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:02,940 INFO L93 Difference]: Finished difference Result 257 states and 319 transitions. [2022-03-19 07:31:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:31:02,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 68 [2022-03-19 07:31:02,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:02,941 INFO L225 Difference]: With dead ends: 257 [2022-03-19 07:31:02,941 INFO L226 Difference]: Without dead ends: 175 [2022-03-19 07:31:02,941 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:31:02,941 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:02,942 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 73 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:31:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-19 07:31:03,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-19 07:31:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.2485207100591715) internal successors, (211), 169 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2022-03-19 07:31:03,070 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 68 [2022-03-19 07:31:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:03,070 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2022-03-19 07:31:03,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2022-03-19 07:31:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2022-03-19 07:31:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:31:03,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:03,071 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:03,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:03,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:03,287 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1927678186, now seen corresponding path program 25 times [2022-03-19 07:31:03,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:03,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [156552321] [2022-03-19 07:31:03,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:03,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:03,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1927678186, now seen corresponding path program 26 times [2022-03-19 07:31:03,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:03,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107422870] [2022-03-19 07:31:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:03,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:03,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-19 07:31:03,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:03,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107422870] [2022-03-19 07:31:03,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107422870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:03,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702753745] [2022-03-19 07:31:03,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:31:03,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:03,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:03,781 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) [2022-03-19 07:31:03,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 07:31:03,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:31:03,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:03,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:31:03,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:04,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:04,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:04,299 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:31:04,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:31:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:04,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702753745] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:04,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:04,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-19 07:31:04,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:04,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [156552321] [2022-03-19 07:31:04,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [156552321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:04,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:04,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:31:04,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965533522] [2022-03-19 07:31:04,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:04,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:31:04,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:04,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:31:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:31:04,344 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:04,974 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2022-03-19 07:31:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:31:04,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:31:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:04,975 INFO L225 Difference]: With dead ends: 263 [2022-03-19 07:31:04,975 INFO L226 Difference]: Without dead ends: 178 [2022-03-19 07:31:04,975 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:31:04,976 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 77 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:04,976 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 78 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:31:04,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-19 07:31:05,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-03-19 07:31:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.244186046511628) internal successors, (214), 172 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 218 transitions. [2022-03-19 07:31:05,069 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 218 transitions. Word has length 68 [2022-03-19 07:31:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:05,069 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 218 transitions. [2022-03-19 07:31:05,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 218 transitions. [2022-03-19 07:31:05,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:31:05,070 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:05,070 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:05,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-19 07:31:05,271 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,SelfDestructingSolverStorable34 [2022-03-19 07:31:05,271 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:05,272 INFO L85 PathProgramCache]: Analyzing trace with hash 829259994, now seen corresponding path program 27 times [2022-03-19 07:31:05,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:05,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [844868124] [2022-03-19 07:31:05,272 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:05,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:05,273 INFO L85 PathProgramCache]: Analyzing trace with hash 829259994, now seen corresponding path program 28 times [2022-03-19 07:31:05,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:05,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764470077] [2022-03-19 07:31:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:05,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:05,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:31:05,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:05,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764470077] [2022-03-19 07:31:05,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764470077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:05,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370472543] [2022-03-19 07:31:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:31:05,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:05,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:05,763 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) [2022-03-19 07:31:05,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 07:31:05,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:31:05,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:31:05,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:06,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:06,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:06,245 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:31:06,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:31:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:06,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370472543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:06,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:06,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 7] total 26 [2022-03-19 07:31:06,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:06,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [844868124] [2022-03-19 07:31:06,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [844868124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:06,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:06,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:31:06,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108513743] [2022-03-19 07:31:06,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:06,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:31:06,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:06,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:31:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:31:06,291 INFO L87 Difference]: Start difference. First operand 177 states and 218 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-03-19 07:31:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:07,151 INFO L93 Difference]: Finished difference Result 305 states and 371 transitions. [2022-03-19 07:31:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:31:07,151 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 68 [2022-03-19 07:31:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:07,152 INFO L225 Difference]: With dead ends: 305 [2022-03-19 07:31:07,152 INFO L226 Difference]: Without dead ends: 217 [2022-03-19 07:31:07,152 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:31:07,153 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 140 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:07,153 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 85 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:31:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-19 07:31:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2022-03-19 07:31:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.2459893048128343) internal successors, (233), 187 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 237 transitions. [2022-03-19 07:31:07,254 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 237 transitions. Word has length 68 [2022-03-19 07:31:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:07,254 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 237 transitions. [2022-03-19 07:31:07,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-03-19 07:31:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 237 transitions. [2022-03-19 07:31:07,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:31:07,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:07,255 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:07,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:07,471 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,SelfDestructingSolverStorable35 [2022-03-19 07:31:07,471 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:07,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:07,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1087425432, now seen corresponding path program 29 times [2022-03-19 07:31:07,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:07,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1883772015] [2022-03-19 07:31:07,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:07,473 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1087425432, now seen corresponding path program 30 times [2022-03-19 07:31:07,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:07,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626708142] [2022-03-19 07:31:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:07,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:07,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-03-19 07:31:07,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:07,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626708142] [2022-03-19 07:31:07,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626708142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:07,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335234747] [2022-03-19 07:31:07,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:31:07,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:07,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:07,792 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) [2022-03-19 07:31:07,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 07:31:07,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:31:07,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:07,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:31:07,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:08,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:08,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:08,304 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:31:08,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:31:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:08,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335234747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:08,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:08,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2022-03-19 07:31:08,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:08,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1883772015] [2022-03-19 07:31:08,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1883772015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:08,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:08,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 07:31:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251025579] [2022-03-19 07:31:08,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:08,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 07:31:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 07:31:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-19 07:31:08,348 INFO L87 Difference]: Start difference. First operand 192 states and 237 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:08,675 INFO L93 Difference]: Finished difference Result 299 states and 369 transitions. [2022-03-19 07:31:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 07:31:08,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:31:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:08,676 INFO L225 Difference]: With dead ends: 299 [2022-03-19 07:31:08,676 INFO L226 Difference]: Without dead ends: 196 [2022-03-19 07:31:08,677 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:31:08,677 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:08,677 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 53 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:31:08,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-19 07:31:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-03-19 07:31:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.2421052631578948) internal successors, (236), 190 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2022-03-19 07:31:08,793 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 68 [2022-03-19 07:31:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:08,794 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2022-03-19 07:31:08,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2022-03-19 07:31:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:31:08,794 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:08,794 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:08,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-19 07:31:08,995 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,SelfDestructingSolverStorable36 [2022-03-19 07:31:08,995 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:08,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1244071192, now seen corresponding path program 31 times [2022-03-19 07:31:08,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:08,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536809743] [2022-03-19 07:31:08,996 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:08,996 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:08,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1244071192, now seen corresponding path program 32 times [2022-03-19 07:31:08,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:08,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020179132] [2022-03-19 07:31:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:08,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:09,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 07:31:09,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:09,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020179132] [2022-03-19 07:31:09,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020179132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:09,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082994376] [2022-03-19 07:31:09,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:31:09,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:09,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:09,332 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) [2022-03-19 07:31:09,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 07:31:09,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:31:09,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:09,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:31:09,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:09,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:09,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:09,853 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:31:09,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:31:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:09,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082994376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:09,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:09,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 22 [2022-03-19 07:31:09,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:09,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536809743] [2022-03-19 07:31:09,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536809743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:09,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:09,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:31:09,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292133990] [2022-03-19 07:31:09,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:09,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:31:09,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:09,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:31:09,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-19 07:31:09,894 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2022-03-19 07:31:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:10,347 INFO L93 Difference]: Finished difference Result 312 states and 384 transitions. [2022-03-19 07:31:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 07:31:10,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 68 [2022-03-19 07:31:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:10,348 INFO L225 Difference]: With dead ends: 312 [2022-03-19 07:31:10,348 INFO L226 Difference]: Without dead ends: 206 [2022-03-19 07:31:10,348 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-03-19 07:31:10,349 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:10,349 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 64 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:31:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-19 07:31:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2022-03-19 07:31:10,463 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) [2022-03-19 07:31:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 250 transitions. [2022-03-19 07:31:10,463 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 250 transitions. Word has length 68 [2022-03-19 07:31:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:10,463 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 250 transitions. [2022-03-19 07:31:10,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2022-03-19 07:31:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 250 transitions. [2022-03-19 07:31:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:31:10,464 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:10,464 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:10,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-19 07:31:10,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:10,679 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash 687355860, now seen corresponding path program 33 times [2022-03-19 07:31:10,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:10,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [34257517] [2022-03-19 07:31:10,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:10,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash 687355860, now seen corresponding path program 34 times [2022-03-19 07:31:10,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:10,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730407782] [2022-03-19 07:31:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:10,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:11,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-19 07:31:11,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730407782] [2022-03-19 07:31:11,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730407782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332404345] [2022-03-19 07:31:11,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:31:11,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:11,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:11,048 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) [2022-03-19 07:31:11,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 07:31:11,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:31:11,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:11,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:31:11,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:11,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:11,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:11,548 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:31:11,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:31:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:11,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332404345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:11,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:11,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 23 [2022-03-19 07:31:11,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:11,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [34257517] [2022-03-19 07:31:11,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [34257517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:11,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:11,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:31:11,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046484476] [2022-03-19 07:31:11,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:11,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:31:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:11,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:31:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:31:11,598 INFO L87 Difference]: Start difference. First operand 204 states and 250 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:12,080 INFO L93 Difference]: Finished difference Result 327 states and 400 transitions. [2022-03-19 07:31:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:31:12,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:31:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:12,081 INFO L225 Difference]: With dead ends: 327 [2022-03-19 07:31:12,081 INFO L226 Difference]: Without dead ends: 212 [2022-03-19 07:31:12,082 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-19 07:31:12,082 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 94 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:12,082 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 65 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:31:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-19 07:31:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2022-03-19 07:31:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2292682926829268) internal successors, (252), 205 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) [2022-03-19 07:31:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 256 transitions. [2022-03-19 07:31:12,206 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 256 transitions. Word has length 68 [2022-03-19 07:31:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:12,207 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 256 transitions. [2022-03-19 07:31:12,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 256 transitions. [2022-03-19 07:31:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:31:12,207 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:12,207 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:12,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 07:31:12,407 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,SelfDestructingSolverStorable38 [2022-03-19 07:31:12,408 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:12,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1190764904, now seen corresponding path program 35 times [2022-03-19 07:31:12,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:12,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033344894] [2022-03-19 07:31:12,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:12,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1190764904, now seen corresponding path program 36 times [2022-03-19 07:31:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:12,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872909457] [2022-03-19 07:31:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:12,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-19 07:31:12,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:12,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872909457] [2022-03-19 07:31:12,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872909457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:12,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515713206] [2022-03-19 07:31:12,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:31:12,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:12,826 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) [2022-03-19 07:31:12,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 07:31:12,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:31:12,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:12,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:31:12,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:13,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:13,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:13,381 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:31:13,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:31:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:13,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515713206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:13,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:13,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 24 [2022-03-19 07:31:13,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:13,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033344894] [2022-03-19 07:31:13,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033344894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:13,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:13,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:31:13,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945661259] [2022-03-19 07:31:13,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:13,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:31:13,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:13,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:31:13,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:31:13,427 INFO L87 Difference]: Start difference. First operand 210 states and 256 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2022-03-19 07:31:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:13,992 INFO L93 Difference]: Finished difference Result 339 states and 412 transitions. [2022-03-19 07:31:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:31:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 68 [2022-03-19 07:31:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:13,993 INFO L225 Difference]: With dead ends: 339 [2022-03-19 07:31:13,993 INFO L226 Difference]: Without dead ends: 218 [2022-03-19 07:31:13,993 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:31:13,993 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:13,994 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 74 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:31:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-19 07:31:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2022-03-19 07:31:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.2227488151658767) internal successors, (258), 211 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) [2022-03-19 07:31:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 262 transitions. [2022-03-19 07:31:14,144 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 262 transitions. Word has length 68 [2022-03-19 07:31:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:14,144 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 262 transitions. [2022-03-19 07:31:14,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2022-03-19 07:31:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 262 transitions. [2022-03-19 07:31:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:31:14,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:14,145 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:14,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:14,345 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,SelfDestructingSolverStorable39 [2022-03-19 07:31:14,345 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:14,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:14,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1905045932, now seen corresponding path program 37 times [2022-03-19 07:31:14,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:14,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1812366539] [2022-03-19 07:31:14,347 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:14,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:14,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1905045932, now seen corresponding path program 38 times [2022-03-19 07:31:14,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:14,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478688068] [2022-03-19 07:31:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:14,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:14,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 34 proven. 57 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-03-19 07:31:14,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:14,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478688068] [2022-03-19 07:31:14,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478688068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:14,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301532576] [2022-03-19 07:31:14,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:31:14,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:14,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:14,774 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) [2022-03-19 07:31:14,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 07:31:14,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:31:14,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:14,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 07:31:14,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:15,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:15,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:15,329 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:31:15,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:31:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:15,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301532576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:15,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:15,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 25 [2022-03-19 07:31:15,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:15,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1812366539] [2022-03-19 07:31:15,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1812366539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:15,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:15,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:31:15,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052760447] [2022-03-19 07:31:15,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:15,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:31:15,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:15,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:31:15,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:31:15,373 INFO L87 Difference]: Start difference. First operand 216 states and 262 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:15,974 INFO L93 Difference]: Finished difference Result 351 states and 424 transitions. [2022-03-19 07:31:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:31:15,975 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:31:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:15,976 INFO L225 Difference]: With dead ends: 351 [2022-03-19 07:31:15,976 INFO L226 Difference]: Without dead ends: 224 [2022-03-19 07:31:15,977 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:31:15,977 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 70 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:15,977 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 79 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:31:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-19 07:31:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 195. [2022-03-19 07:31:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.2421052631578948) internal successors, (236), 190 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2022-03-19 07:31:16,093 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 68 [2022-03-19 07:31:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:16,093 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2022-03-19 07:31:16,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2022-03-19 07:31:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 07:31:16,093 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:16,093 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:16,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-19 07:31:16,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:16,294 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1110057686, now seen corresponding path program 39 times [2022-03-19 07:31:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:16,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [76337969] [2022-03-19 07:31:16,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:16,296 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:16,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1110057686, now seen corresponding path program 40 times [2022-03-19 07:31:16,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:16,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524929957] [2022-03-19 07:31:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:16,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:16,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:16,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:16,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524929957] [2022-03-19 07:31:16,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524929957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:16,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567101204] [2022-03-19 07:31:16,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:31:16,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:16,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:16,476 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) [2022-03-19 07:31:16,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 07:31:16,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:31:16,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:16,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 07:31:16,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:16,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:16,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:16,889 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-19 07:31:16,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 13 [2022-03-19 07:31:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-19 07:31:16,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567101204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:16,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:16,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 14 [2022-03-19 07:31:16,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:16,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [76337969] [2022-03-19 07:31:16,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [76337969] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:16,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:16,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 07:31:16,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512884176] [2022-03-19 07:31:16,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:16,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 07:31:16,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 07:31:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-19 07:31:16,923 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:17,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:17,318 INFO L93 Difference]: Finished difference Result 335 states and 415 transitions. [2022-03-19 07:31:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 07:31:17,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-19 07:31:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:17,319 INFO L225 Difference]: With dead ends: 335 [2022-03-19 07:31:17,319 INFO L226 Difference]: Without dead ends: 330 [2022-03-19 07:31:17,319 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-03-19 07:31:17,320 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 94 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:17,320 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 46 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:31:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-19 07:31:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 197. [2022-03-19 07:31:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.2395833333333333) internal successors, (238), 192 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 242 transitions. [2022-03-19 07:31:17,464 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 242 transitions. Word has length 68 [2022-03-19 07:31:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:17,465 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 242 transitions. [2022-03-19 07:31:17,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 242 transitions. [2022-03-19 07:31:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 07:31:17,465 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:17,466 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:17,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:17,687 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,SelfDestructingSolverStorable41 [2022-03-19 07:31:17,687 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:17,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:17,687 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 1 times [2022-03-19 07:31:17,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:17,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2103896017] [2022-03-19 07:31:17,688 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:17,688 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:17,688 INFO L85 PathProgramCache]: Analyzing trace with hash 683782070, now seen corresponding path program 2 times [2022-03-19 07:31:17,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:17,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244468653] [2022-03-19 07:31:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:17,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:17,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:31:17,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:17,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244468653] [2022-03-19 07:31:17,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244468653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:17,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472919395] [2022-03-19 07:31:17,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:31:17,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:17,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:17,828 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) [2022-03-19 07:31:17,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 07:31:18,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:31:18,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 07:31:18,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:18,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-19 07:31:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-03-19 07:31:18,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-19 07:31:18,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472919395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:18,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:18,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 11] total 26 [2022-03-19 07:31:18,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:18,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2103896017] [2022-03-19 07:31:18,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2103896017] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:18,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:18,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 07:31:18,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052663864] [2022-03-19 07:31:18,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:18,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 07:31:18,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:18,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 07:31:18,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:31:18,642 INFO L87 Difference]: Start difference. First operand 197 states and 242 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:19,237 INFO L93 Difference]: Finished difference Result 288 states and 365 transitions. [2022-03-19 07:31:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:31:19,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-19 07:31:19,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:19,238 INFO L225 Difference]: With dead ends: 288 [2022-03-19 07:31:19,238 INFO L226 Difference]: Without dead ends: 227 [2022-03-19 07:31:19,239 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:31:19,239 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 145 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:19,239 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 111 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:31:19,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-19 07:31:19,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 203. [2022-03-19 07:31:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.2424242424242424) internal successors, (246), 198 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) [2022-03-19 07:31:19,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 250 transitions. [2022-03-19 07:31:19,387 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 250 transitions. Word has length 69 [2022-03-19 07:31:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:19,387 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 250 transitions. [2022-03-19 07:31:19,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 250 transitions. [2022-03-19 07:31:19,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-19 07:31:19,388 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:19,388 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:19,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-19 07:31:19,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:19,592 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 3 times [2022-03-19 07:31:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:19,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1776998378] [2022-03-19 07:31:19,593 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:19,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:19,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1061805680, now seen corresponding path program 4 times [2022-03-19 07:31:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:19,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5217731] [2022-03-19 07:31:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:19,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-03-19 07:31:19,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:19,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5217731] [2022-03-19 07:31:19,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5217731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:19,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773571114] [2022-03-19 07:31:19,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:31:19,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:19,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:19,732 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) [2022-03-19 07:31:19,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 07:31:19,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:31:19,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 07:31:19,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-03-19 07:31:20,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:20,152 INFO L356 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-03-19 07:31:20,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 8 [2022-03-19 07:31:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-03-19 07:31:20,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773571114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:20,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:20,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 9] total 25 [2022-03-19 07:31:20,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:20,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1776998378] [2022-03-19 07:31:20,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1776998378] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:20,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:20,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:31:20,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970902443] [2022-03-19 07:31:20,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:20,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:31:20,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:20,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:31:20,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:31:20,254 INFO L87 Difference]: Start difference. First operand 203 states and 250 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2022-03-19 07:31:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:20,767 INFO L93 Difference]: Finished difference Result 387 states and 486 transitions. [2022-03-19 07:31:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:31:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 72 [2022-03-19 07:31:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:20,768 INFO L225 Difference]: With dead ends: 387 [2022-03-19 07:31:20,768 INFO L226 Difference]: Without dead ends: 217 [2022-03-19 07:31:20,769 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:31:20,769 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 161 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:20,769 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 93 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:31:20,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-19 07:31:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 209. [2022-03-19 07:31:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.2352941176470589) internal successors, (252), 204 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) [2022-03-19 07:31:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 256 transitions. [2022-03-19 07:31:20,918 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 256 transitions. Word has length 72 [2022-03-19 07:31:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:20,918 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 256 transitions. [2022-03-19 07:31:20,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2022-03-19 07:31:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 256 transitions. [2022-03-19 07:31:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 07:31:20,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:20,919 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:20,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:21,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:21,120 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:21,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 5 times [2022-03-19 07:31:21,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:21,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2098512803] [2022-03-19 07:31:21,121 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:21,121 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:21,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1358921078, now seen corresponding path program 6 times [2022-03-19 07:31:21,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:21,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188563704] [2022-03-19 07:31:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:21,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:21,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 07:31:21,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188563704] [2022-03-19 07:31:21,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188563704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:21,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282048880] [2022-03-19 07:31:21,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:31:21,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:21,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:21,196 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) [2022-03-19 07:31:21,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 07:31:21,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:31:21,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 07:31:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:21,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-19 07:31:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-03-19 07:31:21,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-03-19 07:31:21,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282048880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:21,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:21,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2022-03-19 07:31:21,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:21,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2098512803] [2022-03-19 07:31:21,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2098512803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:21,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:21,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 07:31:21,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074024534] [2022-03-19 07:31:21,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:21,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 07:31:21,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:21,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 07:31:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:31:21,657 INFO L87 Difference]: Start difference. First operand 209 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2022-03-19 07:31:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:22,470 INFO L93 Difference]: Finished difference Result 921 states and 1158 transitions. [2022-03-19 07:31:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:31:22,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 75 [2022-03-19 07:31:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:22,473 INFO L225 Difference]: With dead ends: 921 [2022-03-19 07:31:22,473 INFO L226 Difference]: Without dead ends: 847 [2022-03-19 07:31:22,473 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:31:22,474 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 174 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:22,474 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 51 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 07:31:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-03-19 07:31:22,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 215. [2022-03-19 07:31:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.2380952380952381) internal successors, (260), 210 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:22,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 264 transitions. [2022-03-19 07:31:22,652 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 264 transitions. Word has length 75 [2022-03-19 07:31:22,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:22,652 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 264 transitions. [2022-03-19 07:31:22,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2022-03-19 07:31:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 264 transitions. [2022-03-19 07:31:22,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 07:31:22,653 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:22,653 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:22,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:22,864 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,SelfDestructingSolverStorable44 [2022-03-19 07:31:22,865 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:22,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:22,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 7 times [2022-03-19 07:31:22,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:22,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015173478] [2022-03-19 07:31:22,866 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:22,866 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:22,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1210713068, now seen corresponding path program 8 times [2022-03-19 07:31:22,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:22,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80633934] [2022-03-19 07:31:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:22,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:22,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 07:31:22,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:22,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80633934] [2022-03-19 07:31:22,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80633934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:22,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209138069] [2022-03-19 07:31:22,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:31:22,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:22,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:22,947 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) [2022-03-19 07:31:22,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 07:31:23,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:31:23,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:23,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 07:31:23,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:23,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-19 07:31:23,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:23,640 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-19 07:31:23,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-03-19 07:31:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 07:31:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209138069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:23,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:23,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2022-03-19 07:31:23,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:23,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015173478] [2022-03-19 07:31:23,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015173478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:23,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:23,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 07:31:23,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353331179] [2022-03-19 07:31:23,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:23,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 07:31:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:23,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 07:31:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:31:23,694 INFO L87 Difference]: Start difference. First operand 215 states and 264 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2022-03-19 07:31:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:24,574 INFO L93 Difference]: Finished difference Result 954 states and 1201 transitions. [2022-03-19 07:31:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:31:24,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 79 [2022-03-19 07:31:24,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:24,577 INFO L225 Difference]: With dead ends: 954 [2022-03-19 07:31:24,577 INFO L226 Difference]: Without dead ends: 880 [2022-03-19 07:31:24,577 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-03-19 07:31:24,577 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 131 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:24,578 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 104 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:31:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-03-19 07:31:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 217. [2022-03-19 07:31:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.240566037735849) internal successors, (263), 212 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 267 transitions. [2022-03-19 07:31:24,794 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 267 transitions. Word has length 79 [2022-03-19 07:31:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:24,794 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 267 transitions. [2022-03-19 07:31:24,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2022-03-19 07:31:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 267 transitions. [2022-03-19 07:31:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-19 07:31:24,795 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:24,795 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:24,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:25,019 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,SelfDestructingSolverStorable45 [2022-03-19 07:31:25,020 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 9 times [2022-03-19 07:31:25,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:25,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060572436] [2022-03-19 07:31:25,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:25,022 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1107665145, now seen corresponding path program 10 times [2022-03-19 07:31:25,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:25,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956831083] [2022-03-19 07:31:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:25,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:25,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 07:31:25,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:25,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956831083] [2022-03-19 07:31:25,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956831083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:25,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966834055] [2022-03-19 07:31:25,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:31:25,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:25,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:25,141 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) [2022-03-19 07:31:25,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 07:31:25,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:31:25,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:25,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 07:31:25,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:25,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-19 07:31:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-19 07:31:25,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:25,843 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-03-19 07:31:25,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-03-19 07:31:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-19 07:31:25,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966834055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:25,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:25,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 24 [2022-03-19 07:31:25,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:25,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060572436] [2022-03-19 07:31:25,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060572436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:25,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:25,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 07:31:25,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239944947] [2022-03-19 07:31:25,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:25,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 07:31:25,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 07:31:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-19 07:31:25,907 INFO L87 Difference]: Start difference. First operand 217 states and 267 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2022-03-19 07:31:27,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:27,313 INFO L93 Difference]: Finished difference Result 1130 states and 1424 transitions. [2022-03-19 07:31:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 07:31:27,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 81 [2022-03-19 07:31:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:27,317 INFO L225 Difference]: With dead ends: 1130 [2022-03-19 07:31:27,317 INFO L226 Difference]: Without dead ends: 1056 [2022-03-19 07:31:27,317 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-03-19 07:31:27,317 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 161 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:27,317 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 128 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:31:27,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-03-19 07:31:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 219. [2022-03-19 07:31:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.2429906542056075) internal successors, (266), 214 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 270 transitions. [2022-03-19 07:31:27,493 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 270 transitions. Word has length 81 [2022-03-19 07:31:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:27,494 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 270 transitions. [2022-03-19 07:31:27,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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) [2022-03-19 07:31:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 270 transitions. [2022-03-19 07:31:27,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 07:31:27,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:27,494 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:27,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-19 07:31:27,695 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,SelfDestructingSolverStorable46 [2022-03-19 07:31:27,695 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash 18898786, now seen corresponding path program 11 times [2022-03-19 07:31:27,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:27,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1746927576] [2022-03-19 07:31:27,696 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:27,696 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:27,696 INFO L85 PathProgramCache]: Analyzing trace with hash 18898786, now seen corresponding path program 12 times [2022-03-19 07:31:27,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:27,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610511904] [2022-03-19 07:31:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:27,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:27,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-03-19 07:31:27,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:27,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610511904] [2022-03-19 07:31:27,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610511904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:27,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617722291] [2022-03-19 07:31:27,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:31:27,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:27,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:27,816 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) [2022-03-19 07:31:27,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 07:31:27,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 07:31:27,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-19 07:31:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-03-19 07:31:28,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 07:31:28,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617722291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:28,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 07:31:28,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-03-19 07:31:28,272 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:28,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1746927576] [2022-03-19 07:31:28,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1746927576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:28,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:28,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 07:31:28,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261131577] [2022-03-19 07:31:28,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:28,273 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 07:31:28,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 07:31:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-03-19 07:31:28,273 INFO L87 Difference]: Start difference. First operand 219 states and 270 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:28,600 INFO L93 Difference]: Finished difference Result 374 states and 462 transitions. [2022-03-19 07:31:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 07:31:28,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-19 07:31:28,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:28,601 INFO L225 Difference]: With dead ends: 374 [2022-03-19 07:31:28,601 INFO L226 Difference]: Without dead ends: 298 [2022-03-19 07:31:28,602 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-19 07:31:28,602 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:28,602 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 110 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-03-19 07:31:28,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-19 07:31:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2022-03-19 07:31:28,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2341463414634146) internal successors, (253), 205 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 257 transitions. [2022-03-19 07:31:28,816 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 257 transitions. Word has length 83 [2022-03-19 07:31:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:28,816 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 257 transitions. [2022-03-19 07:31:28,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 257 transitions. [2022-03-19 07:31:28,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:31:28,817 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:28,817 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:28,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:29,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:29,018 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash -485839224, now seen corresponding path program 1 times [2022-03-19 07:31:29,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:29,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [369002086] [2022-03-19 07:31:29,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:29,020 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:29,020 INFO L85 PathProgramCache]: Analyzing trace with hash -485839224, now seen corresponding path program 2 times [2022-03-19 07:31:29,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:29,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232709384] [2022-03-19 07:31:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:29,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:29,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 07:31:29,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:29,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232709384] [2022-03-19 07:31:29,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232709384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:29,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077173645] [2022-03-19 07:31:29,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:31:29,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:29,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:29,432 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) [2022-03-19 07:31:29,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 07:31:29,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:31:29,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:29,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:31:29,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:30,296 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:31:30,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:31:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:31:30,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:30,700 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:31:30,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:31:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:31:30,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077173645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:30,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:30,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 39 [2022-03-19 07:31:30,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:30,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [369002086] [2022-03-19 07:31:30,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [369002086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:30,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:30,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:31:30,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451104533] [2022-03-19 07:31:30,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:30,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:31:30,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:30,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:31:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 07:31:30,950 INFO L87 Difference]: Start difference. First operand 210 states and 257 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:31:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:32,093 INFO L93 Difference]: Finished difference Result 265 states and 328 transitions. [2022-03-19 07:31:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:31:32,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-03-19 07:31:32,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:32,095 INFO L225 Difference]: With dead ends: 265 [2022-03-19 07:31:32,095 INFO L226 Difference]: Without dead ends: 226 [2022-03-19 07:31:32,095 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 07:31:32,096 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 139 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:32,096 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 113 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:31:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-19 07:31:32,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-03-19 07:31:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.2363636363636363) internal successors, (272), 220 states have internal predecessors, (272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 276 transitions. [2022-03-19 07:31:32,281 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 276 transitions. Word has length 102 [2022-03-19 07:31:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:32,281 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 276 transitions. [2022-03-19 07:31:32,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:31:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 276 transitions. [2022-03-19 07:31:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:31:32,282 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:32,282 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:32,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-19 07:31:32,495 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,SelfDestructingSolverStorable48 [2022-03-19 07:31:32,495 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:32,496 INFO L85 PathProgramCache]: Analyzing trace with hash -878866234, now seen corresponding path program 1 times [2022-03-19 07:31:32,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:32,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [551053393] [2022-03-19 07:31:32,497 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:32,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:32,497 INFO L85 PathProgramCache]: Analyzing trace with hash -878866234, now seen corresponding path program 2 times [2022-03-19 07:31:32,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:32,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939337912] [2022-03-19 07:31:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:32,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:32,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 26 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-03-19 07:31:32,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939337912] [2022-03-19 07:31:32,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939337912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:32,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254898878] [2022-03-19 07:31:32,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:31:32,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:32,810 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) [2022-03-19 07:31:32,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 07:31:32,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:31:32,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:31:32,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:33,528 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:31:33,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:31:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:31:33,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:33,931 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:31:33,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:31:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:31:34,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254898878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:34,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:34,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 35 [2022-03-19 07:31:34,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:34,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [551053393] [2022-03-19 07:31:34,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [551053393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:34,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:34,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:31:34,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668711182] [2022-03-19 07:31:34,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:34,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:31:34,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:31:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:31:34,129 INFO L87 Difference]: Start difference. First operand 225 states and 276 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2022-03-19 07:31:34,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:34,765 INFO L93 Difference]: Finished difference Result 283 states and 350 transitions. [2022-03-19 07:31:34,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:31:34,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 102 [2022-03-19 07:31:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:34,766 INFO L225 Difference]: With dead ends: 283 [2022-03-19 07:31:34,766 INFO L226 Difference]: Without dead ends: 229 [2022-03-19 07:31:34,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=1665, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:31:34,766 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 131 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:34,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 73 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:31:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-19 07:31:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-03-19 07:31:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.2331838565022422) internal successors, (275), 223 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2022-03-19 07:31:34,939 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 102 [2022-03-19 07:31:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:34,939 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2022-03-19 07:31:34,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2022-03-19 07:31:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2022-03-19 07:31:34,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:31:34,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:34,944 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:34,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:35,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 07:31:35,167 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:35,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:35,167 INFO L85 PathProgramCache]: Analyzing trace with hash -345290614, now seen corresponding path program 3 times [2022-03-19 07:31:35,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:35,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [976127100] [2022-03-19 07:31:35,168 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:35,168 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash -345290614, now seen corresponding path program 4 times [2022-03-19 07:31:35,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:35,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500413863] [2022-03-19 07:31:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:35,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:35,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 07:31:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:35,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500413863] [2022-03-19 07:31:35,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500413863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210604892] [2022-03-19 07:31:35,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:31:35,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:35,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:35,549 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) [2022-03-19 07:31:35,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 07:31:35,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:31:35,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:31:35,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:36,239 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:31:36,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-19 07:31:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:31:36,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:36,648 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-19 07:31:36,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-19 07:31:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:31:36,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210604892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:36,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:36,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 12] total 38 [2022-03-19 07:31:36,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:36,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [976127100] [2022-03-19 07:31:36,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [976127100] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:36,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:36,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:31:36,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933962681] [2022-03-19 07:31:36,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:36,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:31:36,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:31:36,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:31:36,784 INFO L87 Difference]: Start difference. First operand 228 states and 279 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:31:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:37,830 INFO L93 Difference]: Finished difference Result 301 states and 372 transitions. [2022-03-19 07:31:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:31:37,830 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-03-19 07:31:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:37,831 INFO L225 Difference]: With dead ends: 301 [2022-03-19 07:31:37,831 INFO L226 Difference]: Without dead ends: 244 [2022-03-19 07:31:37,832 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=2402, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 07:31:37,832 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 121 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:37,832 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 110 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:31:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-19 07:31:38,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 228. [2022-03-19 07:31:38,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.2331838565022422) internal successors, (275), 223 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:38,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2022-03-19 07:31:38,091 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 102 [2022-03-19 07:31:38,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:38,091 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2022-03-19 07:31:38,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:31:38,091 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2022-03-19 07:31:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:31:38,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:38,092 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:38,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:38,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:38,317 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:38,317 INFO L85 PathProgramCache]: Analyzing trace with hash -738317624, now seen corresponding path program 5 times [2022-03-19 07:31:38,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:38,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797059198] [2022-03-19 07:31:38,318 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:38,318 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:38,318 INFO L85 PathProgramCache]: Analyzing trace with hash -738317624, now seen corresponding path program 6 times [2022-03-19 07:31:38,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:38,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541969657] [2022-03-19 07:31:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:38,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:38,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-19 07:31:38,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:38,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541969657] [2022-03-19 07:31:38,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541969657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:38,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066487562] [2022-03-19 07:31:38,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:31:38,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:38,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:38,739 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) [2022-03-19 07:31:38,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 07:31:39,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 07:31:39,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:39,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 07:31:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:42,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 07:31:42,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 07:31:42,228 INFO L356 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-03-19 07:31:42,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 28 [2022-03-19 07:31:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 110 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-19 07:31:42,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:44,642 INFO L356 Elim1Store]: treesize reduction 166, result has 26.2 percent of original size [2022-03-19 07:31:44,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 74 [2022-03-19 07:31:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 103 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-19 07:31:44,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066487562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:44,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:44,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 22] total 57 [2022-03-19 07:31:44,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797059198] [2022-03-19 07:31:44,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797059198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:44,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:44,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:31:44,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747899119] [2022-03-19 07:31:44,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:44,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:31:44,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:44,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:31:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=2757, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 07:31:44,788 INFO L87 Difference]: Start difference. First operand 228 states and 279 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:45,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:45,837 INFO L93 Difference]: Finished difference Result 298 states and 368 transitions. [2022-03-19 07:31:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:31:45,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:31:45,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:45,838 INFO L225 Difference]: With dead ends: 298 [2022-03-19 07:31:45,838 INFO L226 Difference]: Without dead ends: 241 [2022-03-19 07:31:45,839 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=624, Invalid=4206, Unknown=0, NotChecked=0, Total=4830 [2022-03-19 07:31:45,839 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 137 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:45,839 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 96 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:31:45,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-19 07:31:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-03-19 07:31:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2340425531914894) internal successors, (290), 235 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 294 transitions. [2022-03-19 07:31:46,032 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 294 transitions. Word has length 102 [2022-03-19 07:31:46,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:46,032 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 294 transitions. [2022-03-19 07:31:46,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 294 transitions. [2022-03-19 07:31:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:31:46,033 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:46,034 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:46,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:46,240 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,SelfDestructingSolverStorable51 [2022-03-19 07:31:46,240 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:46,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1325123638, now seen corresponding path program 7 times [2022-03-19 07:31:46,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:46,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020294070] [2022-03-19 07:31:46,242 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:46,242 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:46,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1325123638, now seen corresponding path program 8 times [2022-03-19 07:31:46,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:46,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201849341] [2022-03-19 07:31:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:46,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-03-19 07:31:46,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:46,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201849341] [2022-03-19 07:31:46,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201849341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:46,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620720403] [2022-03-19 07:31:46,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:31:46,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:46,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:46,651 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) [2022-03-19 07:31:46,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 07:31:46,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:31:46,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:31:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:47,388 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:31:47,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:31:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:31:47,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:47,778 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:31:47,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:31:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:31:47,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620720403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:47,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:47,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 37 [2022-03-19 07:31:47,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:47,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020294070] [2022-03-19 07:31:47,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020294070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:47,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:47,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:31:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764397728] [2022-03-19 07:31:47,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:47,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:31:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:31:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:31:47,926 INFO L87 Difference]: Start difference. First operand 240 states and 294 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2022-03-19 07:31:48,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:48,767 INFO L93 Difference]: Finished difference Result 321 states and 396 transitions. [2022-03-19 07:31:48,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:31:48,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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 102 [2022-03-19 07:31:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:48,770 INFO L225 Difference]: With dead ends: 321 [2022-03-19 07:31:48,770 INFO L226 Difference]: Without dead ends: 252 [2022-03-19 07:31:48,770 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 07:31:48,771 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 122 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:48,771 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 89 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:31:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-19 07:31:48,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2022-03-19 07:31:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2254098360655739) internal successors, (299), 244 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 303 transitions. [2022-03-19 07:31:48,978 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 303 transitions. Word has length 102 [2022-03-19 07:31:48,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:48,978 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 303 transitions. [2022-03-19 07:31:48,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2022-03-19 07:31:48,978 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 303 transitions. [2022-03-19 07:31:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:31:48,979 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:48,979 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:49,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:49,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:49,195 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1948775304, now seen corresponding path program 9 times [2022-03-19 07:31:49,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:49,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611685997] [2022-03-19 07:31:49,197 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:49,197 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:49,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1948775304, now seen corresponding path program 10 times [2022-03-19 07:31:49,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:49,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132826059] [2022-03-19 07:31:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:49,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:49,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 07:31:49,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132826059] [2022-03-19 07:31:49,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132826059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334500880] [2022-03-19 07:31:49,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:31:49,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:49,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:49,542 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) [2022-03-19 07:31:49,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 07:31:49,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:31:49,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:31:49,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:50,195 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:31:50,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-19 07:31:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:31:50,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:50,548 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-19 07:31:50,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-19 07:31:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:31:50,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334500880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:50,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:50,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 35 [2022-03-19 07:31:50,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:50,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611685997] [2022-03-19 07:31:50,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611685997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:50,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:50,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:31:50,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897718887] [2022-03-19 07:31:50,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:50,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:31:50,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:31:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:31:50,681 INFO L87 Difference]: Start difference. First operand 249 states and 303 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:51,452 INFO L93 Difference]: Finished difference Result 339 states and 414 transitions. [2022-03-19 07:31:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:31:51,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:31:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:51,454 INFO L225 Difference]: With dead ends: 339 [2022-03-19 07:31:51,454 INFO L226 Difference]: Without dead ends: 261 [2022-03-19 07:31:51,454 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 07:31:51,454 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 111 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:51,454 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 77 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:31:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-19 07:31:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2022-03-19 07:31:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.2173913043478262) internal successors, (308), 253 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 312 transitions. [2022-03-19 07:31:51,672 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 312 transitions. Word has length 102 [2022-03-19 07:31:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:51,672 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 312 transitions. [2022-03-19 07:31:51,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 312 transitions. [2022-03-19 07:31:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:31:51,673 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:51,673 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:51,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 07:31:51,884 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,SelfDestructingSolverStorable53 [2022-03-19 07:31:51,884 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1280899916, now seen corresponding path program 11 times [2022-03-19 07:31:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:51,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1416798537] [2022-03-19 07:31:51,886 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:51,886 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:51,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1280899916, now seen corresponding path program 12 times [2022-03-19 07:31:51,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:51,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556333790] [2022-03-19 07:31:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:51,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:52,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-03-19 07:31:52,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:52,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556333790] [2022-03-19 07:31:52,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556333790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:52,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737284631] [2022-03-19 07:31:52,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:31:52,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:52,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:52,288 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) [2022-03-19 07:31:52,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 07:31:52,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 07:31:52,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:52,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 07:31:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:53,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 07:31:53,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 07:31:53,747 INFO L356 Elim1Store]: treesize reduction 76, result has 26.9 percent of original size [2022-03-19 07:31:53,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 44 [2022-03-19 07:31:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 82 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-03-19 07:31:53,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:55,138 INFO L356 Elim1Store]: treesize reduction 116, result has 52.7 percent of original size [2022-03-19 07:31:55,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 144 [2022-03-19 07:31:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 131 proven. 38 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-03-19 07:31:56,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737284631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:56,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:56,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 51 [2022-03-19 07:31:56,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1416798537] [2022-03-19 07:31:56,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1416798537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:56,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:56,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:31:56,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995932346] [2022-03-19 07:31:56,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:56,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:31:56,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:31:56,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2282, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:31:56,968 INFO L87 Difference]: Start difference. First operand 258 states and 312 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2022-03-19 07:31:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:31:57,883 INFO L93 Difference]: Finished difference Result 357 states and 432 transitions. [2022-03-19 07:31:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:31:57,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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 102 [2022-03-19 07:31:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:31:57,884 INFO L225 Difference]: With dead ends: 357 [2022-03-19 07:31:57,884 INFO L226 Difference]: Without dead ends: 270 [2022-03-19 07:31:57,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 07:31:57,885 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 111 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:31:57,885 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 90 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:31:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-19 07:31:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 258. [2022-03-19 07:31:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.2173913043478262) internal successors, (308), 253 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:31:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 312 transitions. [2022-03-19 07:31:58,090 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 312 transitions. Word has length 102 [2022-03-19 07:31:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:31:58,090 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 312 transitions. [2022-03-19 07:31:58,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2022-03-19 07:31:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 312 transitions. [2022-03-19 07:31:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:31:58,091 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:31:58,091 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:31:58,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-19 07:31:58,291 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,SelfDestructingSolverStorable54 [2022-03-19 07:31:58,291 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:31:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:31:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash 259831562, now seen corresponding path program 13 times [2022-03-19 07:31:58,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:58,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1627917872] [2022-03-19 07:31:58,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:31:58,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:31:58,293 INFO L85 PathProgramCache]: Analyzing trace with hash 259831562, now seen corresponding path program 14 times [2022-03-19 07:31:58,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:31:58,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275455284] [2022-03-19 07:31:58,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:31:58,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:31:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:58,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:31:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:31:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-03-19 07:31:58,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:31:58,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275455284] [2022-03-19 07:31:58,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275455284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:31:58,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132903619] [2022-03-19 07:31:58,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:31:58,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:31:58,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:31:58,658 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) [2022-03-19 07:31:58,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-19 07:31:58,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:31:58,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:31:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:31:58,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:31:59,445 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:31:59,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:31:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:31:59,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:31:59,839 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:31:59,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:31:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:31:59,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132903619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:31:59,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:31:59,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 35 [2022-03-19 07:31:59,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:31:59,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1627917872] [2022-03-19 07:31:59,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1627917872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:31:59,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:31:59,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:31:59,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461326491] [2022-03-19 07:31:59,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:31:59,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:31:59,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:31:59,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:31:59,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:31:59,982 INFO L87 Difference]: Start difference. First operand 258 states and 312 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2022-03-19 07:32:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:00,657 INFO L93 Difference]: Finished difference Result 342 states and 414 transitions. [2022-03-19 07:32:00,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:32:00,658 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 102 [2022-03-19 07:32:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:00,659 INFO L225 Difference]: With dead ends: 342 [2022-03-19 07:32:00,659 INFO L226 Difference]: Without dead ends: 255 [2022-03-19 07:32:00,659 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1757, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 07:32:00,659 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 85 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:00,659 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 82 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:32:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-19 07:32:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-03-19 07:32:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.216) internal successors, (304), 250 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 308 transitions. [2022-03-19 07:32:00,869 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 308 transitions. Word has length 102 [2022-03-19 07:32:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:00,869 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 308 transitions. [2022-03-19 07:32:00,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2022-03-19 07:32:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 308 transitions. [2022-03-19 07:32:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:00,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:00,870 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:00,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-19 07:32:01,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:01,079 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2127337274, now seen corresponding path program 15 times [2022-03-19 07:32:01,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:01,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [392363307] [2022-03-19 07:32:01,081 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:01,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2127337274, now seen corresponding path program 16 times [2022-03-19 07:32:01,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:01,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333946937] [2022-03-19 07:32:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:01,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:01,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 07:32:01,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:01,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333946937] [2022-03-19 07:32:01,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333946937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:01,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010708643] [2022-03-19 07:32:01,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:32:01,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:01,487 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) [2022-03-19 07:32:01,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-19 07:32:01,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:32:01,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:32:01,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:02,234 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:32:02,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-19 07:32:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:32:02,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:32:02,574 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-19 07:32:02,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-19 07:32:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:32:02,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010708643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:32:02,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:32:02,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 35 [2022-03-19 07:32:02,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:32:02,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [392363307] [2022-03-19 07:32:02,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [392363307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:32:02,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:32:02,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:32:02,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839037443] [2022-03-19 07:32:02,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:32:02,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:32:02,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:32:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:32:02,685 INFO L87 Difference]: Start difference. First operand 255 states and 308 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:03,432 INFO L93 Difference]: Finished difference Result 336 states and 406 transitions. [2022-03-19 07:32:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:32:03,433 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:32:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:03,434 INFO L225 Difference]: With dead ends: 336 [2022-03-19 07:32:03,434 INFO L226 Difference]: Without dead ends: 252 [2022-03-19 07:32:03,434 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1854, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 07:32:03,434 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 85 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:03,434 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 87 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:32:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-19 07:32:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-03-19 07:32:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.214574898785425) internal successors, (300), 247 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 304 transitions. [2022-03-19 07:32:03,642 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 304 transitions. Word has length 102 [2022-03-19 07:32:03,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:03,642 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 304 transitions. [2022-03-19 07:32:03,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 304 transitions. [2022-03-19 07:32:03,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:03,643 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:03,643 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:03,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-19 07:32:03,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:03,843 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1499754634, now seen corresponding path program 17 times [2022-03-19 07:32:03,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:03,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [106350822] [2022-03-19 07:32:03,845 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:03,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1499754634, now seen corresponding path program 18 times [2022-03-19 07:32:03,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:03,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199936037] [2022-03-19 07:32:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:03,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:04,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-03-19 07:32:04,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:04,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199936037] [2022-03-19 07:32:04,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199936037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:04,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270661107] [2022-03-19 07:32:04,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:32:04,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:04,260 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) [2022-03-19 07:32:04,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-19 07:32:05,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 07:32:05,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:05,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-19 07:32:05,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:05,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-19 07:32:21,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 07:32:21,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 07:32:21,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 07:32:21,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 07:32:21,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 07:32:21,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 07:32:21,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 07:32:21,583 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-19 07:32:21,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 24 [2022-03-19 07:32:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 87 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-03-19 07:32:21,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:32:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 128 proven. 75 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-03-19 07:32:28,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270661107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:32:28,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:32:28,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 31, 32] total 74 [2022-03-19 07:32:28,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:32:28,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [106350822] [2022-03-19 07:32:28,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [106350822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:32:28,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:32:28,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:32:28,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566658573] [2022-03-19 07:32:28,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:32:28,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:32:28,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:28,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:32:28,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=4589, Unknown=9, NotChecked=0, Total=5402 [2022-03-19 07:32:28,862 INFO L87 Difference]: Start difference. First operand 252 states and 304 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2022-03-19 07:32:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:29,858 INFO L93 Difference]: Finished difference Result 333 states and 401 transitions. [2022-03-19 07:32:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:32:29,858 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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 102 [2022-03-19 07:32:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:29,859 INFO L225 Difference]: With dead ends: 333 [2022-03-19 07:32:29,859 INFO L226 Difference]: Without dead ends: 252 [2022-03-19 07:32:29,860 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2354 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=978, Invalid=6323, Unknown=9, NotChecked=0, Total=7310 [2022-03-19 07:32:29,860 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 89 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:29,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 76 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:32:29,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-19 07:32:30,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-03-19 07:32:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.2105263157894737) internal successors, (299), 247 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:30,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 303 transitions. [2022-03-19 07:32:30,062 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 303 transitions. Word has length 102 [2022-03-19 07:32:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:30,062 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 303 transitions. [2022-03-19 07:32:30,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2022-03-19 07:32:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 303 transitions. [2022-03-19 07:32:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:30,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:30,063 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:30,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-19 07:32:30,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:30,270 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:30,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:30,271 INFO L85 PathProgramCache]: Analyzing trace with hash 478686280, now seen corresponding path program 19 times [2022-03-19 07:32:30,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:30,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1991525645] [2022-03-19 07:32:30,272 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:30,272 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash 478686280, now seen corresponding path program 20 times [2022-03-19 07:32:30,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:30,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423404015] [2022-03-19 07:32:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:30,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:30,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-03-19 07:32:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423404015] [2022-03-19 07:32:30,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423404015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:30,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534191193] [2022-03-19 07:32:30,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:32:30,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:30,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:30,626 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) [2022-03-19 07:32:30,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-19 07:32:30,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:32:30,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:30,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:32:30,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:31,353 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:32:31,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:32:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:32:31,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:32:31,741 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:32:31,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:32:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:32:31,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534191193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:32:31,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:32:31,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 13] total 33 [2022-03-19 07:32:31,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:32:31,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1991525645] [2022-03-19 07:32:31,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1991525645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:32:31,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:32:31,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 07:32:31,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977502753] [2022-03-19 07:32:31,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:32:31,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 07:32:31,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:31,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 07:32:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 07:32:31,876 INFO L87 Difference]: Start difference. First operand 252 states and 303 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2022-03-19 07:32:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:32,442 INFO L93 Difference]: Finished difference Result 340 states and 408 transitions. [2022-03-19 07:32:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 07:32:32,442 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 102 [2022-03-19 07:32:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:32,443 INFO L225 Difference]: With dead ends: 340 [2022-03-19 07:32:32,443 INFO L226 Difference]: Without dead ends: 259 [2022-03-19 07:32:32,443 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 07:32:32,444 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 66 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:32,444 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 59 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:32:32,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-19 07:32:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2022-03-19 07:32:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.209486166007905) internal successors, (306), 253 states have internal predecessors, (306), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 310 transitions. [2022-03-19 07:32:32,648 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 310 transitions. Word has length 102 [2022-03-19 07:32:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:32,649 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 310 transitions. [2022-03-19 07:32:32,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2022-03-19 07:32:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 310 transitions. [2022-03-19 07:32:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:32,650 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:32,650 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:32,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-19 07:32:32,858 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,SelfDestructingSolverStorable58 [2022-03-19 07:32:32,858 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:32,859 INFO L85 PathProgramCache]: Analyzing trace with hash 196615876, now seen corresponding path program 21 times [2022-03-19 07:32:32,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:32,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2748202] [2022-03-19 07:32:32,859 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:32,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:32,859 INFO L85 PathProgramCache]: Analyzing trace with hash 196615876, now seen corresponding path program 22 times [2022-03-19 07:32:32,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:32,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916402898] [2022-03-19 07:32:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:32,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:33,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-19 07:32:33,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916402898] [2022-03-19 07:32:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916402898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827592141] [2022-03-19 07:32:33,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:32:33,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:33,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:33,240 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) [2022-03-19 07:32:33,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-19 07:32:33,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:32:33,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:33,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:32:33,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:33,931 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:32:33,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-19 07:32:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:32:33,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:32:34,289 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-19 07:32:34,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-19 07:32:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:32:34,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827592141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:32:34,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:32:34,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-03-19 07:32:34,403 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:32:34,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2748202] [2022-03-19 07:32:34,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2748202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:32:34,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:32:34,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:32:34,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412234299] [2022-03-19 07:32:34,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:32:34,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:32:34,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:34,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:32:34,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:32:34,404 INFO L87 Difference]: Start difference. First operand 258 states and 310 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:35,448 INFO L93 Difference]: Finished difference Result 346 states and 414 transitions. [2022-03-19 07:32:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:32:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:32:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:35,449 INFO L225 Difference]: With dead ends: 346 [2022-03-19 07:32:35,449 INFO L226 Difference]: Without dead ends: 259 [2022-03-19 07:32:35,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=2301, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:32:35,450 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 159 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:35,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 95 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:32:35,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-19 07:32:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 249. [2022-03-19 07:32:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2131147540983607) internal successors, (296), 244 states have internal predecessors, (296), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2022-03-19 07:32:35,647 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 102 [2022-03-19 07:32:35,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:35,647 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2022-03-19 07:32:35,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2022-03-19 07:32:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:35,648 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:35,648 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:35,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-19 07:32:35,872 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,SelfDestructingSolverStorable59 [2022-03-19 07:32:35,872 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:35,873 INFO L85 PathProgramCache]: Analyzing trace with hash -390190138, now seen corresponding path program 23 times [2022-03-19 07:32:35,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:35,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604978277] [2022-03-19 07:32:35,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:35,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:35,874 INFO L85 PathProgramCache]: Analyzing trace with hash -390190138, now seen corresponding path program 24 times [2022-03-19 07:32:35,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:35,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82057217] [2022-03-19 07:32:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:35,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:36,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-03-19 07:32:36,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:36,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82057217] [2022-03-19 07:32:36,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82057217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:36,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198631256] [2022-03-19 07:32:36,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:32:36,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:36,215 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) [2022-03-19 07:32:36,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-19 07:32:36,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 07:32:36,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:36,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 07:32:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:37,685 INFO L356 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2022-03-19 07:32:37,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 43 [2022-03-19 07:32:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 103 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-19 07:32:37,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:32:38,785 INFO L356 Elim1Store]: treesize reduction 122, result has 52.2 percent of original size [2022-03-19 07:32:38,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 148 [2022-03-19 07:32:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 108 proven. 77 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-19 07:32:41,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198631256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:32:41,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:32:41,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 49 [2022-03-19 07:32:41,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:32:41,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604978277] [2022-03-19 07:32:41,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604978277] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:32:41,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:32:41,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:32:41,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908197549] [2022-03-19 07:32:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:32:41,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:32:41,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:41,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:32:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2114, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 07:32:41,219 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2022-03-19 07:32:41,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:41,970 INFO L93 Difference]: Finished difference Result 327 states and 393 transitions. [2022-03-19 07:32:41,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:32:41,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 102 [2022-03-19 07:32:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:41,971 INFO L225 Difference]: With dead ends: 327 [2022-03-19 07:32:41,971 INFO L226 Difference]: Without dead ends: 249 [2022-03-19 07:32:41,971 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=328, Invalid=3094, Unknown=0, NotChecked=0, Total=3422 [2022-03-19 07:32:41,971 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 152 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:41,971 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 69 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:32:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-19 07:32:42,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-03-19 07:32:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.209016393442623) internal successors, (295), 244 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 299 transitions. [2022-03-19 07:32:42,172 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 299 transitions. Word has length 102 [2022-03-19 07:32:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:42,172 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 299 transitions. [2022-03-19 07:32:42,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2022-03-19 07:32:42,172 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 299 transitions. [2022-03-19 07:32:42,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:42,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:42,173 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:42,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-19 07:32:42,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:42,373 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:42,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1517608322, now seen corresponding path program 25 times [2022-03-19 07:32:42,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:42,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [451431399] [2022-03-19 07:32:42,374 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:42,374 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:42,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1517608322, now seen corresponding path program 26 times [2022-03-19 07:32:42,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:42,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558543800] [2022-03-19 07:32:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:42,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:42,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 07:32:42,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:42,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558543800] [2022-03-19 07:32:42,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558543800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:42,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027862051] [2022-03-19 07:32:42,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:32:42,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:42,739 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) [2022-03-19 07:32:42,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-19 07:32:42,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:32:42,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:42,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:32:42,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:43,502 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:32:43,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:32:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:32:43,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:32:43,908 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:32:43,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:32:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:32:44,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027862051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:32:44,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:32:44,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2022-03-19 07:32:44,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:32:44,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [451431399] [2022-03-19 07:32:44,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [451431399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:32:44,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:32:44,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:32:44,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103578285] [2022-03-19 07:32:44,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:32:44,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:32:44,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:44,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:32:44,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:32:44,051 INFO L87 Difference]: Start difference. First operand 249 states and 299 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:44,787 INFO L93 Difference]: Finished difference Result 327 states and 391 transitions. [2022-03-19 07:32:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:32:44,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:32:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:44,788 INFO L225 Difference]: With dead ends: 327 [2022-03-19 07:32:44,788 INFO L226 Difference]: Without dead ends: 249 [2022-03-19 07:32:44,789 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 07:32:44,789 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:44,789 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 70 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:32:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-19 07:32:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-03-19 07:32:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 244 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2022-03-19 07:32:44,985 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 102 [2022-03-19 07:32:44,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:44,986 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2022-03-19 07:32:44,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:44,986 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2022-03-19 07:32:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:44,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:44,986 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:45,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-19 07:32:45,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:45,188 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:45,188 INFO L85 PathProgramCache]: Analyzing trace with hash 849732934, now seen corresponding path program 27 times [2022-03-19 07:32:45,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:45,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [964191124] [2022-03-19 07:32:45,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:45,189 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 849732934, now seen corresponding path program 28 times [2022-03-19 07:32:45,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:45,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973262604] [2022-03-19 07:32:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:45,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:45,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-03-19 07:32:45,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:45,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973262604] [2022-03-19 07:32:45,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973262604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:45,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157235932] [2022-03-19 07:32:45,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:32:45,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:45,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:45,584 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) [2022-03-19 07:32:45,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-19 07:32:45,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:32:45,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:45,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:32:45,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:46,347 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:32:46,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-19 07:32:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:32:46,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:32:46,705 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-19 07:32:46,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-19 07:32:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:32:46,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157235932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:32:46,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:32:46,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 36 [2022-03-19 07:32:46,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:32:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [964191124] [2022-03-19 07:32:46,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [964191124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:32:46,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:32:46,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:32:46,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628687007] [2022-03-19 07:32:46,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:32:46,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:32:46,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:46,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:32:46,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 07:32:46,831 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2022-03-19 07:32:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:47,644 INFO L93 Difference]: Finished difference Result 328 states and 390 transitions. [2022-03-19 07:32:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:32:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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 102 [2022-03-19 07:32:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:47,645 INFO L225 Difference]: With dead ends: 328 [2022-03-19 07:32:47,645 INFO L226 Difference]: Without dead ends: 250 [2022-03-19 07:32:47,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 07:32:47,645 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 99 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:47,646 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 87 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:32:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-19 07:32:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2022-03-19 07:32:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2085106382978723) internal successors, (284), 235 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 288 transitions. [2022-03-19 07:32:47,837 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 288 transitions. Word has length 102 [2022-03-19 07:32:47,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:47,838 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 288 transitions. [2022-03-19 07:32:47,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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) [2022-03-19 07:32:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 288 transitions. [2022-03-19 07:32:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:47,838 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:47,838 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:47,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-19 07:32:48,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:48,040 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:48,040 INFO L85 PathProgramCache]: Analyzing trace with hash -171335420, now seen corresponding path program 29 times [2022-03-19 07:32:48,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:48,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1618331962] [2022-03-19 07:32:48,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:48,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash -171335420, now seen corresponding path program 30 times [2022-03-19 07:32:48,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:48,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707703122] [2022-03-19 07:32:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:48,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:48,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 26 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-03-19 07:32:48,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:48,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707703122] [2022-03-19 07:32:48,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707703122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:48,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268704856] [2022-03-19 07:32:48,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:32:48,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:48,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:48,446 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) [2022-03-19 07:32:48,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-19 07:32:49,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 07:32:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:49,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 07:32:49,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:49,997 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-03-19 07:32:49,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2022-03-19 07:32:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 104 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-19 07:32:50,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:32:50,881 INFO L356 Elim1Store]: treesize reduction 114, result has 49.3 percent of original size [2022-03-19 07:32:50,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 126 [2022-03-19 07:32:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 130 proven. 55 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-19 07:32:51,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268704856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:32:51,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:32:51,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 20] total 49 [2022-03-19 07:32:51,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:32:51,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1618331962] [2022-03-19 07:32:51,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1618331962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:32:51,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:32:51,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:32:51,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053951811] [2022-03-19 07:32:51,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:32:51,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:32:51,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:51,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:32:51,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 07:32:51,023 INFO L87 Difference]: Start difference. First operand 240 states and 288 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:51,753 INFO L93 Difference]: Finished difference Result 313 states and 374 transitions. [2022-03-19 07:32:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:32:51,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:32:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:51,754 INFO L225 Difference]: With dead ends: 313 [2022-03-19 07:32:51,754 INFO L226 Difference]: Without dead ends: 244 [2022-03-19 07:32:51,754 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=400, Invalid=2906, Unknown=0, NotChecked=0, Total=3306 [2022-03-19 07:32:51,755 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 103 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:51,755 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 64 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:32:51,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-19 07:32:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-03-19 07:32:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-03-19 07:32:52,008 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-03-19 07:32:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:52,008 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-03-19 07:32:52,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-03-19 07:32:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:52,009 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:52,009 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:52,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-19 07:32:52,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:52,210 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:52,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:52,210 INFO L85 PathProgramCache]: Analyzing trace with hash 730191496, now seen corresponding path program 31 times [2022-03-19 07:32:52,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:52,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [544123931] [2022-03-19 07:32:52,211 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:52,211 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 730191496, now seen corresponding path program 32 times [2022-03-19 07:32:52,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:52,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524642353] [2022-03-19 07:32:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:52,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:52,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 07:32:52,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:52,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524642353] [2022-03-19 07:32:52,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524642353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:52,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418056499] [2022-03-19 07:32:52,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:32:52,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:52,604 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) [2022-03-19 07:32:52,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-19 07:32:52,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:32:52,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:52,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:32:52,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:53,423 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:32:53,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:32:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:32:53,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:32:53,852 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:32:53,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:32:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:32:53,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418056499] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:32:53,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:32:53,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 39 [2022-03-19 07:32:53,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:32:53,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [544123931] [2022-03-19 07:32:53,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [544123931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:32:53,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:32:53,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:32:53,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459045947] [2022-03-19 07:32:53,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:32:53,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:32:53,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:53,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:32:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 07:32:53,996 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:32:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:55,067 INFO L93 Difference]: Finished difference Result 325 states and 387 transitions. [2022-03-19 07:32:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:32:55,067 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-03-19 07:32:55,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:55,068 INFO L225 Difference]: With dead ends: 325 [2022-03-19 07:32:55,068 INFO L226 Difference]: Without dead ends: 253 [2022-03-19 07:32:55,069 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 07:32:55,069 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 150 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:55,069 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 89 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:32:55,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-19 07:32:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2022-03-19 07:32:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 244 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 298 transitions. [2022-03-19 07:32:55,272 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 298 transitions. Word has length 102 [2022-03-19 07:32:55,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:55,272 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 298 transitions. [2022-03-19 07:32:55,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:32:55,272 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 298 transitions. [2022-03-19 07:32:55,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:55,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:55,273 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:55,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-19 07:32:55,473 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,SelfDestructingSolverStorable64 [2022-03-19 07:32:55,473 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:55,474 INFO L85 PathProgramCache]: Analyzing trace with hash 337164486, now seen corresponding path program 33 times [2022-03-19 07:32:55,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:55,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2016106888] [2022-03-19 07:32:55,475 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:55,475 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:55,475 INFO L85 PathProgramCache]: Analyzing trace with hash 337164486, now seen corresponding path program 34 times [2022-03-19 07:32:55,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:55,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778406023] [2022-03-19 07:32:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:55,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:55,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-19 07:32:55,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:55,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778406023] [2022-03-19 07:32:55,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778406023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:55,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028860024] [2022-03-19 07:32:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:32:55,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:55,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:55,860 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) [2022-03-19 07:32:55,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-19 07:32:56,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:32:56,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:56,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:32:56,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:56,579 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:32:56,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-19 07:32:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:32:56,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:32:56,972 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-19 07:32:56,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-19 07:32:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:32:57,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028860024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:32:57,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:32:57,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-03-19 07:32:57,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:32:57,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2016106888] [2022-03-19 07:32:57,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2016106888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:32:57,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:32:57,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:32:57,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782297536] [2022-03-19 07:32:57,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:32:57,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:32:57,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:57,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:32:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:32:57,101 INFO L87 Difference]: Start difference. First operand 249 states and 298 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:58,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:32:58,075 INFO L93 Difference]: Finished difference Result 328 states and 390 transitions. [2022-03-19 07:32:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:32:58,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:32:58,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:32:58,076 INFO L225 Difference]: With dead ends: 328 [2022-03-19 07:32:58,077 INFO L226 Difference]: Without dead ends: 250 [2022-03-19 07:32:58,077 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=2300, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:32:58,077 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 149 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:32:58,077 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 107 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:32:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-19 07:32:58,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2022-03-19 07:32:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2085106382978723) internal successors, (284), 235 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 288 transitions. [2022-03-19 07:32:58,267 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 288 transitions. Word has length 102 [2022-03-19 07:32:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:32:58,267 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 288 transitions. [2022-03-19 07:32:58,267 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:32:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 288 transitions. [2022-03-19 07:32:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:32:58,268 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:32:58,268 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:32:58,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-19 07:32:58,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:58,471 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:32:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:32:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash -249641528, now seen corresponding path program 35 times [2022-03-19 07:32:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:32:58,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1813436953] [2022-03-19 07:32:58,472 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:32:58,472 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:32:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash -249641528, now seen corresponding path program 36 times [2022-03-19 07:32:58,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:32:58,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462853002] [2022-03-19 07:32:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:32:58,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:32:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:58,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:32:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:32:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 40 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-03-19 07:32:58,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:32:58,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462853002] [2022-03-19 07:32:58,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462853002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:32:58,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384382107] [2022-03-19 07:32:58,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:32:58,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:32:58,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:32:58,913 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) [2022-03-19 07:32:58,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-19 07:32:59,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 07:32:59,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:32:59,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 07:32:59,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:32:59,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-19 07:33:00,113 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-03-19 07:33:00,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2022-03-19 07:33:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 38 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:00,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:00,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384382107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:00,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:00,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 31 [2022-03-19 07:33:00,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:00,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1813436953] [2022-03-19 07:33:00,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1813436953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:00,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:00,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:33:00,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019265915] [2022-03-19 07:33:00,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:00,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:33:00,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:00,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:33:00,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-03-19 07:33:00,483 INFO L87 Difference]: Start difference. First operand 240 states and 288 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2022-03-19 07:33:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:01,212 INFO L93 Difference]: Finished difference Result 313 states and 374 transitions. [2022-03-19 07:33:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:33:01,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 102 [2022-03-19 07:33:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:01,213 INFO L225 Difference]: With dead ends: 313 [2022-03-19 07:33:01,213 INFO L226 Difference]: Without dead ends: 244 [2022-03-19 07:33:01,214 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 07:33:01,214 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:01,214 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 77 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-19 07:33:01,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-03-19 07:33:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-03-19 07:33:01,413 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-03-19 07:33:01,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:01,413 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-03-19 07:33:01,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2022-03-19 07:33:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-03-19 07:33:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:01,414 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:01,414 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:01,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-19 07:33:01,614 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,SelfDestructingSolverStorable66 [2022-03-19 07:33:01,614 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1656977340, now seen corresponding path program 37 times [2022-03-19 07:33:01,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:01,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1273667998] [2022-03-19 07:33:01,616 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:01,616 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1656977340, now seen corresponding path program 38 times [2022-03-19 07:33:01,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:01,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78633899] [2022-03-19 07:33:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:01,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:01,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 07:33:01,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:01,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78633899] [2022-03-19 07:33:01,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78633899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:01,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323876948] [2022-03-19 07:33:01,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:01,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:01,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:01,939 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) [2022-03-19 07:33:01,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-19 07:33:02,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:02,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:33:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:02,750 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:33:02,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:33:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:33:02,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:03,146 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:33:03,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:33:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:03,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323876948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:03,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:03,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 13] total 39 [2022-03-19 07:33:03,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1273667998] [2022-03-19 07:33:03,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1273667998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:03,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:03,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:33:03,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540061177] [2022-03-19 07:33:03,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:03,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:33:03,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:03,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:33:03,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 07:33:03,297 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:33:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:04,378 INFO L93 Difference]: Finished difference Result 321 states and 382 transitions. [2022-03-19 07:33:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:33:04,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-03-19 07:33:04,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:04,379 INFO L225 Difference]: With dead ends: 321 [2022-03-19 07:33:04,379 INFO L226 Difference]: Without dead ends: 249 [2022-03-19 07:33:04,380 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=2486, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 07:33:04,380 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 187 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:04,380 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 111 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:33:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-19 07:33:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 243. [2022-03-19 07:33:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:04,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-03-19 07:33:04,593 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-03-19 07:33:04,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:04,594 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-03-19 07:33:04,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:33:04,594 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-03-19 07:33:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:04,594 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:04,594 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:04,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:04,795 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,SelfDestructingSolverStorable67 [2022-03-19 07:33:04,795 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:04,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2050004350, now seen corresponding path program 39 times [2022-03-19 07:33:04,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:04,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [760343684] [2022-03-19 07:33:04,796 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:04,796 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2050004350, now seen corresponding path program 40 times [2022-03-19 07:33:04,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:04,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911539541] [2022-03-19 07:33:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:04,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:05,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-19 07:33:05,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:05,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911539541] [2022-03-19 07:33:05,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911539541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:05,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951908389] [2022-03-19 07:33:05,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:05,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:05,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:05,169 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) [2022-03-19 07:33:05,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-19 07:33:05,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:05,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:05,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:33:05,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:05,884 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:33:05,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-19 07:33:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:33:05,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:06,254 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-19 07:33:06,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-19 07:33:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:06,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951908389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:06,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:06,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-03-19 07:33:06,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:06,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [760343684] [2022-03-19 07:33:06,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [760343684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:06,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:06,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:33:06,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301136061] [2022-03-19 07:33:06,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:06,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:33:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:33:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:33:06,386 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:07,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:07,354 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2022-03-19 07:33:07,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:33:07,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:33:07,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:07,355 INFO L225 Difference]: With dead ends: 319 [2022-03-19 07:33:07,355 INFO L226 Difference]: Without dead ends: 247 [2022-03-19 07:33:07,356 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=251, Invalid=2299, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:33:07,356 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 165 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:07,356 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 110 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:33:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-19 07:33:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-03-19 07:33:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-03-19 07:33:07,555 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 102 [2022-03-19 07:33:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:07,556 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-03-19 07:33:07,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-03-19 07:33:07,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:07,556 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:07,556 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:07,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-19 07:33:07,757 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,SelfDestructingSolverStorable68 [2022-03-19 07:33:07,757 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:07,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2051183942, now seen corresponding path program 41 times [2022-03-19 07:33:07,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:07,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1724192436] [2022-03-19 07:33:07,758 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:07,758 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:07,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2051183942, now seen corresponding path program 42 times [2022-03-19 07:33:07,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:07,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424939131] [2022-03-19 07:33:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:07,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:08,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 07:33:08,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:08,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424939131] [2022-03-19 07:33:08,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424939131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:08,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728463494] [2022-03-19 07:33:08,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:08,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:08,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:08,216 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) [2022-03-19 07:33:08,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-19 07:33:09,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 07:33:09,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:09,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 07:33:09,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 109 proven. 104 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-03-19 07:33:13,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:24,573 INFO L356 Elim1Store]: treesize reduction 326, result has 28.7 percent of original size [2022-03-19 07:33:24,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 153 [2022-03-19 07:33:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 53 proven. 142 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-03-19 07:33:24,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728463494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:24,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:24,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 31] total 73 [2022-03-19 07:33:24,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:24,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1724192436] [2022-03-19 07:33:24,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1724192436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:24,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:24,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:33:24,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914130990] [2022-03-19 07:33:24,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:24,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:33:24,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:33:24,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=4465, Unknown=0, NotChecked=0, Total=5256 [2022-03-19 07:33:24,955 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:33:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:26,177 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-03-19 07:33:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:33:26,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-03-19 07:33:26,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:26,178 INFO L225 Difference]: With dead ends: 325 [2022-03-19 07:33:26,178 INFO L226 Difference]: Without dead ends: 250 [2022-03-19 07:33:26,179 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1165, Invalid=6317, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 07:33:26,179 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 194 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:26,179 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 83 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:33:26,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-19 07:33:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2022-03-19 07:33:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.2085106382978723) internal successors, (284), 235 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 288 transitions. [2022-03-19 07:33:26,389 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 288 transitions. Word has length 102 [2022-03-19 07:33:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:26,389 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 288 transitions. [2022-03-19 07:33:26,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:33:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 288 transitions. [2022-03-19 07:33:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:26,390 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:26,390 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:26,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-19 07:33:26,590 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,SelfDestructingSolverStorable69 [2022-03-19 07:33:26,590 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:26,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1658156932, now seen corresponding path program 43 times [2022-03-19 07:33:26,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:26,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1238184500] [2022-03-19 07:33:26,591 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:26,591 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1658156932, now seen corresponding path program 44 times [2022-03-19 07:33:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:26,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320615665] [2022-03-19 07:33:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:26,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:26,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 57 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-19 07:33:26,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:26,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320615665] [2022-03-19 07:33:26,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320615665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:26,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741595157] [2022-03-19 07:33:26,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:26,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:26,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:26,988 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) [2022-03-19 07:33:26,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-19 07:33:27,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:27,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:27,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:33:27,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:27,846 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:33:27,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:33:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:33:27,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:28,287 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:33:28,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:33:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:28,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741595157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:28,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:28,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 37 [2022-03-19 07:33:28,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:28,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1238184500] [2022-03-19 07:33:28,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1238184500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:28,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:28,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:33:28,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232058783] [2022-03-19 07:33:28,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:28,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:33:28,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:33:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:33:28,435 INFO L87 Difference]: Start difference. First operand 240 states and 288 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:29,282 INFO L93 Difference]: Finished difference Result 313 states and 374 transitions. [2022-03-19 07:33:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:33:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:33:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:29,283 INFO L225 Difference]: With dead ends: 313 [2022-03-19 07:33:29,283 INFO L226 Difference]: Without dead ends: 244 [2022-03-19 07:33:29,283 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 07:33:29,283 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 88 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:29,283 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 86 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:33:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-19 07:33:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-03-19 07:33:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-03-19 07:33:29,476 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-03-19 07:33:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:29,476 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-03-19 07:33:29,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-03-19 07:33:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:29,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:29,477 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:29,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-19 07:33:29,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:29,680 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1577087558, now seen corresponding path program 45 times [2022-03-19 07:33:29,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:29,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1932937] [2022-03-19 07:33:29,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:29,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1577087558, now seen corresponding path program 46 times [2022-03-19 07:33:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:29,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963306262] [2022-03-19 07:33:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:30,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-19 07:33:30,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963306262] [2022-03-19 07:33:30,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963306262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293955282] [2022-03-19 07:33:30,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:30,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:30,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:30,078 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) [2022-03-19 07:33:30,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-19 07:33:30,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:30,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:30,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:33:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:30,802 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:33:30,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-19 07:33:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:33:30,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:31,189 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-19 07:33:31,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-19 07:33:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:31,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293955282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:31,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:31,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 12] total 37 [2022-03-19 07:33:31,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:31,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1932937] [2022-03-19 07:33:31,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1932937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:31,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:31,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:33:31,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957908816] [2022-03-19 07:33:31,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:31,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:33:31,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:31,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:33:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:33:31,317 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:32,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:32,294 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2022-03-19 07:33:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:33:32,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:33:32,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:32,295 INFO L225 Difference]: With dead ends: 319 [2022-03-19 07:33:32,295 INFO L226 Difference]: Without dead ends: 247 [2022-03-19 07:33:32,295 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 07:33:32,296 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 130 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:32,296 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 97 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:33:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-19 07:33:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-03-19 07:33:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-03-19 07:33:32,518 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 102 [2022-03-19 07:33:32,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:32,519 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-03-19 07:33:32,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-03-19 07:33:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:32,519 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:32,519 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:32,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-19 07:33:32,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:32,720 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:32,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:32,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1383308554, now seen corresponding path program 47 times [2022-03-19 07:33:32,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:32,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1276566802] [2022-03-19 07:33:32,721 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:32,721 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:32,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1383308554, now seen corresponding path program 48 times [2022-03-19 07:33:32,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:32,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659476778] [2022-03-19 07:33:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:32,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:33,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 07:33:33,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:33,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659476778] [2022-03-19 07:33:33,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659476778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:33,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715492912] [2022-03-19 07:33:33,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:33,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:33,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:33,066 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) [2022-03-19 07:33:33,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-19 07:33:34,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 07:33:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:34,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 07:33:34,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-03-19 07:33:35,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:36,416 INFO L356 Elim1Store]: treesize reduction 276, result has 39.6 percent of original size [2022-03-19 07:33:36,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 204 [2022-03-19 07:33:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 109 proven. 14 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 07:33:40,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715492912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:40,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:40,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 51 [2022-03-19 07:33:40,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:40,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1276566802] [2022-03-19 07:33:40,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1276566802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:40,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:40,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:33:40,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414223476] [2022-03-19 07:33:40,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:40,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:33:40,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:33:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2234, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:33:40,336 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:33:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:41,586 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-03-19 07:33:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:33:41,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-03-19 07:33:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:41,588 INFO L225 Difference]: With dead ends: 325 [2022-03-19 07:33:41,588 INFO L226 Difference]: Without dead ends: 250 [2022-03-19 07:33:41,588 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=442, Invalid=3718, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 07:33:41,589 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 204 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:41,589 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 86 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:33:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-19 07:33:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2022-03-19 07:33:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.2058823529411764) internal successors, (287), 238 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 291 transitions. [2022-03-19 07:33:41,791 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 291 transitions. Word has length 102 [2022-03-19 07:33:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:41,791 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 291 transitions. [2022-03-19 07:33:41,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:33:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 291 transitions. [2022-03-19 07:33:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:41,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:41,792 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:41,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-19 07:33:41,992 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:41,993 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:41,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:41,993 INFO L85 PathProgramCache]: Analyzing trace with hash 990281544, now seen corresponding path program 49 times [2022-03-19 07:33:41,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:41,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [173266464] [2022-03-19 07:33:41,994 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:41,994 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash 990281544, now seen corresponding path program 50 times [2022-03-19 07:33:41,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:41,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830859379] [2022-03-19 07:33:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:41,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:42,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 77 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2022-03-19 07:33:42,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:42,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830859379] [2022-03-19 07:33:42,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830859379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:42,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738841252] [2022-03-19 07:33:42,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:42,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:42,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:42,463 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) [2022-03-19 07:33:42,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-19 07:33:42,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:42,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:33:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:43,297 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:33:43,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:33:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:33:43,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:43,785 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:33:43,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:33:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:43,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738841252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:43,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:43,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 38 [2022-03-19 07:33:43,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:43,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [173266464] [2022-03-19 07:33:43,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [173266464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:43,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:43,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:33:43,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737184368] [2022-03-19 07:33:43,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:43,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:33:43,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:43,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:33:43,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:33:43,952 INFO L87 Difference]: Start difference. First operand 243 states and 291 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 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) [2022-03-19 07:33:44,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:44,894 INFO L93 Difference]: Finished difference Result 319 states and 380 transitions. [2022-03-19 07:33:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:33:44,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 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 102 [2022-03-19 07:33:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:44,896 INFO L225 Difference]: With dead ends: 319 [2022-03-19 07:33:44,896 INFO L226 Difference]: Without dead ends: 247 [2022-03-19 07:33:44,897 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=2198, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 07:33:44,897 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:44,897 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 91 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:33:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-19 07:33:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-03-19 07:33:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-03-19 07:33:45,102 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 102 [2022-03-19 07:33:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:45,103 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-03-19 07:33:45,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 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) [2022-03-19 07:33:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-03-19 07:33:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:45,104 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:45,104 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:45,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:45,304 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,SelfDestructingSolverStorable73 [2022-03-19 07:33:45,305 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:45,305 INFO L85 PathProgramCache]: Analyzing trace with hash 556019204, now seen corresponding path program 51 times [2022-03-19 07:33:45,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:45,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223292752] [2022-03-19 07:33:45,306 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:45,306 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:45,306 INFO L85 PathProgramCache]: Analyzing trace with hash 556019204, now seen corresponding path program 52 times [2022-03-19 07:33:45,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:45,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3098349] [2022-03-19 07:33:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:45,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:45,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-19 07:33:45,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:45,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3098349] [2022-03-19 07:33:45,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3098349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:45,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571828643] [2022-03-19 07:33:45,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:45,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:45,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:45,759 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) [2022-03-19 07:33:45,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-19 07:33:46,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:46,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:46,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:33:46,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:46,571 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:33:46,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-03-19 07:33:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:33:46,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:46,965 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-19 07:33:46,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-19 07:33:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:47,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571828643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:47,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:47,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 38 [2022-03-19 07:33:47,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223292752] [2022-03-19 07:33:47,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223292752] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:47,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:47,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:33:47,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303848959] [2022-03-19 07:33:47,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:47,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:33:47,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:33:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 07:33:47,083 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:48,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:48,095 INFO L93 Difference]: Finished difference Result 325 states and 386 transitions. [2022-03-19 07:33:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 07:33:48,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:33:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:48,097 INFO L225 Difference]: With dead ends: 325 [2022-03-19 07:33:48,097 INFO L226 Difference]: Without dead ends: 250 [2022-03-19 07:33:48,097 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=246, Invalid=2304, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:33:48,097 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 102 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:48,097 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 88 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:33:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-19 07:33:48,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-03-19 07:33:48,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.2008196721311475) internal successors, (293), 244 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2022-03-19 07:33:48,305 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 102 [2022-03-19 07:33:48,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:48,305 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2022-03-19 07:33:48,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:48,305 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2022-03-19 07:33:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:48,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:48,306 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:48,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-19 07:33:48,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:48,507 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:48,507 INFO L85 PathProgramCache]: Analyzing trace with hash 362240200, now seen corresponding path program 53 times [2022-03-19 07:33:48,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:48,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371024214] [2022-03-19 07:33:48,508 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:48,508 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:48,508 INFO L85 PathProgramCache]: Analyzing trace with hash 362240200, now seen corresponding path program 54 times [2022-03-19 07:33:48,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:48,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019736286] [2022-03-19 07:33:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:48,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:49,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 07:33:49,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:49,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019736286] [2022-03-19 07:33:49,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019736286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:49,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784953398] [2022-03-19 07:33:49,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:33:49,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:49,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:49,031 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) [2022-03-19 07:33:49,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-19 07:33:49,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 07:33:49,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:49,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 07:33:49,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:50,655 INFO L356 Elim1Store]: treesize reduction 46, result has 33.3 percent of original size [2022-03-19 07:33:50,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 39 [2022-03-19 07:33:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 38 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:50,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:51,423 INFO L356 Elim1Store]: treesize reduction 114, result has 53.5 percent of original size [2022-03-19 07:33:51,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 146 [2022-03-19 07:33:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 73 proven. 10 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:52,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784953398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:52,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:52,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 13] total 41 [2022-03-19 07:33:52,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:52,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371024214] [2022-03-19 07:33:52,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371024214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:52,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:52,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:33:52,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632988364] [2022-03-19 07:33:52,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:52,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:33:52,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:33:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-03-19 07:33:52,656 INFO L87 Difference]: Start difference. First operand 249 states and 297 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:33:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:53,936 INFO L93 Difference]: Finished difference Result 385 states and 452 transitions. [2022-03-19 07:33:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:33:53,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-03-19 07:33:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:53,937 INFO L225 Difference]: With dead ends: 385 [2022-03-19 07:33:53,937 INFO L226 Difference]: Without dead ends: 307 [2022-03-19 07:33:53,937 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2022-03-19 07:33:53,937 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 125 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:53,937 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 101 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:33:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-19 07:33:54,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 270. [2022-03-19 07:33:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.2075471698113207) internal successors, (320), 265 states have internal predecessors, (320), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 324 transitions. [2022-03-19 07:33:54,169 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 324 transitions. Word has length 102 [2022-03-19 07:33:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:54,169 INFO L478 AbstractCegarLoop]: Abstraction has 270 states and 324 transitions. [2022-03-19 07:33:54,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:33:54,169 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 324 transitions. [2022-03-19 07:33:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:54,169 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:54,170 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:54,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-19 07:33:54,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:54,370 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:54,370 INFO L85 PathProgramCache]: Analyzing trace with hash -30786810, now seen corresponding path program 55 times [2022-03-19 07:33:54,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:54,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [845684623] [2022-03-19 07:33:54,371 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:54,371 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash -30786810, now seen corresponding path program 56 times [2022-03-19 07:33:54,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:54,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096444014] [2022-03-19 07:33:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:54,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:54,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-03-19 07:33:54,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:54,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096444014] [2022-03-19 07:33:54,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096444014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:54,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477893003] [2022-03-19 07:33:54,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:33:54,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:54,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:54,905 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) [2022-03-19 07:33:54,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-19 07:33:55,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:33:55,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:55,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 07:33:55,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:55,688 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:33:55,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:33:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-03-19 07:33:55,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:33:56,078 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:33:56,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:33:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 12 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-03-19 07:33:56,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477893003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:33:56,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:33:56,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 35 [2022-03-19 07:33:56,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:33:56,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [845684623] [2022-03-19 07:33:56,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [845684623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:33:56,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:33:56,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 07:33:56,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740906281] [2022-03-19 07:33:56,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:33:56,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 07:33:56,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:56,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 07:33:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:33:56,208 INFO L87 Difference]: Start difference. First operand 270 states and 324 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:33:57,293 INFO L93 Difference]: Finished difference Result 846 states and 1013 transitions. [2022-03-19 07:33:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 07:33:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:33:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:33:57,295 INFO L225 Difference]: With dead ends: 846 [2022-03-19 07:33:57,295 INFO L226 Difference]: Without dead ends: 747 [2022-03-19 07:33:57,296 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=1498, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:33:57,296 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 215 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:33:57,296 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 52 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:33:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-19 07:33:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 352. [2022-03-19 07:33:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.2046109510086456) internal successors, (418), 347 states have internal predecessors, (418), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 422 transitions. [2022-03-19 07:33:57,623 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 422 transitions. Word has length 102 [2022-03-19 07:33:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:33:57,623 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 422 transitions. [2022-03-19 07:33:57,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:33:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 422 transitions. [2022-03-19 07:33:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:33:57,624 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:33:57,624 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:33:57,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-19 07:33:57,825 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,SelfDestructingSolverStorable76 [2022-03-19 07:33:57,825 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:33:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:33:57,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1765297018, now seen corresponding path program 57 times [2022-03-19 07:33:57,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:33:57,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1227118758] [2022-03-19 07:33:57,826 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:33:57,826 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:33:57,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1765297018, now seen corresponding path program 58 times [2022-03-19 07:33:57,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:33:57,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470346371] [2022-03-19 07:33:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:33:57,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:33:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:58,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:33:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:33:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 76 proven. 85 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-19 07:33:58,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:33:58,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470346371] [2022-03-19 07:33:58,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470346371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:33:58,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376012594] [2022-03-19 07:33:58,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:33:58,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:33:58,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:33:58,357 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) [2022-03-19 07:33:58,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-19 07:33:58,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:33:58,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:33:58,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 07:33:58,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:33:58,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 07:33:58,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:33:58,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:33:58,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:33:58,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:33:58,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:33:58,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:33:58,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:33:58,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:33:59,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:33:59,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:33:59,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:00,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 07:34:00,093 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-03-19 07:34:00,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 27 [2022-03-19 07:34:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 91 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-19 07:34:00,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:00,968 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3848 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3848) |c_main_~#vetor_vogais~0.base|)) (.cse1 (select v_ArrVal_3848 |c_main_~#string_entrada~0.offset|))) (or (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (not (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)) .cse1))))) is different from false [2022-03-19 07:34:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 07:34:01,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376012594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:01,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:01,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 56 [2022-03-19 07:34:01,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1227118758] [2022-03-19 07:34:01,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1227118758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:01,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:01,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 07:34:01,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560625143] [2022-03-19 07:34:01,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:01,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 07:34:01,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 07:34:01,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2679, Unknown=1, NotChecked=106, Total=3080 [2022-03-19 07:34:01,143 INFO L87 Difference]: Start difference. First operand 352 states and 422 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:02,990 INFO L93 Difference]: Finished difference Result 692 states and 822 transitions. [2022-03-19 07:34:02,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 07:34:02,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:34:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:02,992 INFO L225 Difference]: With dead ends: 692 [2022-03-19 07:34:02,992 INFO L226 Difference]: Without dead ends: 593 [2022-03-19 07:34:02,993 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=514, Invalid=5341, Unknown=1, NotChecked=150, Total=6006 [2022-03-19 07:34:02,993 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 123 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:02,993 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 63 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:34:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-03-19 07:34:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 533. [2022-03-19 07:34:03,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 528 states have (on average 1.2007575757575757) internal successors, (634), 528 states have internal predecessors, (634), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 638 transitions. [2022-03-19 07:34:03,526 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 638 transitions. Word has length 102 [2022-03-19 07:34:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:03,527 INFO L478 AbstractCegarLoop]: Abstraction has 533 states and 638 transitions. [2022-03-19 07:34:03,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 638 transitions. [2022-03-19 07:34:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:34:03,527 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:03,528 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:03,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-19 07:34:03,729 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,SelfDestructingSolverStorable77 [2022-03-19 07:34:03,729 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1879648578, now seen corresponding path program 59 times [2022-03-19 07:34:03,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:03,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [418437788] [2022-03-19 07:34:03,730 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:03,730 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1879648578, now seen corresponding path program 60 times [2022-03-19 07:34:03,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:03,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147706278] [2022-03-19 07:34:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:03,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:04,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 49 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-03-19 07:34:04,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:04,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147706278] [2022-03-19 07:34:04,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147706278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:04,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386381429] [2022-03-19 07:34:04,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:34:04,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:04,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:04,385 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) [2022-03-19 07:34:04,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-19 07:34:05,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 07:34:05,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:05,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 07:34:05,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:05,845 INFO L356 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2022-03-19 07:34:05,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 43 [2022-03-19 07:34:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 103 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-19 07:34:05,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:06,759 INFO L356 Elim1Store]: treesize reduction 122, result has 52.2 percent of original size [2022-03-19 07:34:06,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 148 [2022-03-19 07:34:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 108 proven. 77 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-03-19 07:34:08,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386381429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:08,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:08,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 51 [2022-03-19 07:34:08,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:08,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [418437788] [2022-03-19 07:34:08,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [418437788] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:08,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:08,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:34:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57288921] [2022-03-19 07:34:08,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:08,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:34:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:34:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 07:34:08,678 INFO L87 Difference]: Start difference. First operand 533 states and 638 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-03-19 07:34:10,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:10,507 INFO L93 Difference]: Finished difference Result 1164 states and 1390 transitions. [2022-03-19 07:34:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:34:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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 102 [2022-03-19 07:34:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:10,510 INFO L225 Difference]: With dead ends: 1164 [2022-03-19 07:34:10,510 INFO L226 Difference]: Without dead ends: 1053 [2022-03-19 07:34:10,511 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=467, Invalid=3439, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 07:34:10,511 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 231 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:10,511 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 76 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-03-19 07:34:11,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 557. [2022-03-19 07:34:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 552 states have (on average 1.1992753623188406) internal successors, (662), 552 states have internal predecessors, (662), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 666 transitions. [2022-03-19 07:34:11,065 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 666 transitions. Word has length 102 [2022-03-19 07:34:11,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:11,065 INFO L478 AbstractCegarLoop]: Abstraction has 557 states and 666 transitions. [2022-03-19 07:34:11,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 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) [2022-03-19 07:34:11,065 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 666 transitions. [2022-03-19 07:34:11,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:34:11,066 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:11,066 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:11,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:11,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:11,274 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:11,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:11,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1801342470, now seen corresponding path program 61 times [2022-03-19 07:34:11,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:11,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1893289608] [2022-03-19 07:34:11,275 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:11,275 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:11,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1801342470, now seen corresponding path program 62 times [2022-03-19 07:34:11,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:11,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739796654] [2022-03-19 07:34:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:11,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:11,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 127 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-03-19 07:34:11,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:11,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739796654] [2022-03-19 07:34:11,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739796654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73450896] [2022-03-19 07:34:11,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:34:11,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:11,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:11,896 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) [2022-03-19 07:34:11,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-19 07:34:12,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:34:12,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:12,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 07:34:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:12,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 07:34:12,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:12,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:12,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:12,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:12,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:12,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:12,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:12,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:12,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:12,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:12,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:13,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-03-19 07:34:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-03-19 07:34:13,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:13,579 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_3968 (Array Int Int))) (let ((.cse1 (select v_ArrVal_3968 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_3968) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-03-19 07:34:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 9 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-03-19 07:34:13,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73450896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:13,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:13,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 12] total 46 [2022-03-19 07:34:13,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:13,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1893289608] [2022-03-19 07:34:13,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1893289608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:13,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:13,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 07:34:13,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815735549] [2022-03-19 07:34:13,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:13,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 07:34:13,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:13,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 07:34:13,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1797, Unknown=1, NotChecked=86, Total=2070 [2022-03-19 07:34:13,708 INFO L87 Difference]: Start difference. First operand 557 states and 666 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:16,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:16,023 INFO L93 Difference]: Finished difference Result 806 states and 944 transitions. [2022-03-19 07:34:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 07:34:16,023 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:34:16,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:16,025 INFO L225 Difference]: With dead ends: 806 [2022-03-19 07:34:16,025 INFO L226 Difference]: Without dead ends: 695 [2022-03-19 07:34:16,025 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=441, Invalid=4818, Unknown=1, NotChecked=142, Total=5402 [2022-03-19 07:34:16,026 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 129 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:16,026 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 90 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 07:34:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-03-19 07:34:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 575. [2022-03-19 07:34:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 570 states have (on average 1.1964912280701754) internal successors, (682), 570 states have internal predecessors, (682), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 686 transitions. [2022-03-19 07:34:16,611 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 686 transitions. Word has length 102 [2022-03-19 07:34:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:16,611 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 686 transitions. [2022-03-19 07:34:16,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 686 transitions. [2022-03-19 07:34:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:34:16,613 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:16,613 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:16,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:16,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:16,840 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:16,840 INFO L85 PathProgramCache]: Analyzing trace with hash -585826366, now seen corresponding path program 63 times [2022-03-19 07:34:16,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:16,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1684486186] [2022-03-19 07:34:16,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:16,841 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:16,841 INFO L85 PathProgramCache]: Analyzing trace with hash -585826366, now seen corresponding path program 64 times [2022-03-19 07:34:16,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:16,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734178783] [2022-03-19 07:34:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:16,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:17,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 76 proven. 148 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-19 07:34:17,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734178783] [2022-03-19 07:34:17,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734178783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592222308] [2022-03-19 07:34:17,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:34:17,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:17,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:17,544 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) [2022-03-19 07:34:17,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-19 07:34:17,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:34:17,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:17,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-19 07:34:17,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:17,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 07:34:17,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:18,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:18,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:18,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:18,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:18,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:18,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:18,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:18,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:18,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:18,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:19,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 07:34:19,347 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-03-19 07:34:19,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 27 [2022-03-19 07:34:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 91 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-19 07:34:19,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:20,350 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4037 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4037) |c_main_~#vetor_vogais~0.base|)) (.cse1 (select v_ArrVal_4037 |c_main_~#string_entrada~0.offset|))) (or (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (not (= (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)) .cse1))))) is different from false [2022-03-19 07:34:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 107 proven. 11 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-19 07:34:20,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592222308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:20,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:20,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 20] total 61 [2022-03-19 07:34:20,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:20,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1684486186] [2022-03-19 07:34:20,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1684486186] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:20,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:20,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 07:34:20,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960110500] [2022-03-19 07:34:20,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:20,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 07:34:20,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 07:34:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3243, Unknown=1, NotChecked=116, Total=3660 [2022-03-19 07:34:20,537 INFO L87 Difference]: Start difference. First operand 575 states and 686 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:23,321 INFO L93 Difference]: Finished difference Result 854 states and 994 transitions. [2022-03-19 07:34:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 07:34:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:34:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:23,323 INFO L225 Difference]: With dead ends: 854 [2022-03-19 07:34:23,323 INFO L226 Difference]: Without dead ends: 731 [2022-03-19 07:34:23,323 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=595, Invalid=7598, Unknown=1, NotChecked=178, Total=8372 [2022-03-19 07:34:23,324 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 131 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:23,324 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 89 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 07:34:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-19 07:34:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 581. [2022-03-19 07:34:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 576 states have (on average 1.1944444444444444) internal successors, (688), 576 states have internal predecessors, (688), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 692 transitions. [2022-03-19 07:34:23,912 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 692 transitions. Word has length 102 [2022-03-19 07:34:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:23,912 INFO L478 AbstractCegarLoop]: Abstraction has 581 states and 692 transitions. [2022-03-19 07:34:23,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 692 transitions. [2022-03-19 07:34:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:34:23,914 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:23,914 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:23,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:24,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:24,139 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:24,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1253701754, now seen corresponding path program 65 times [2022-03-19 07:34:24,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:24,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [639561992] [2022-03-19 07:34:24,141 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:24,141 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1253701754, now seen corresponding path program 66 times [2022-03-19 07:34:24,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:24,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374668165] [2022-03-19 07:34:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:24,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:25,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 170 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-19 07:34:25,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:25,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374668165] [2022-03-19 07:34:25,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374668165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:25,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876127661] [2022-03-19 07:34:25,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:34:25,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:25,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:25,021 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) [2022-03-19 07:34:25,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-19 07:34:26,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 07:34:26,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:26,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-19 07:34:26,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:26,065 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:34:26,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 11 [2022-03-19 07:34:26,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:26,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:26,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:26,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:26,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:26,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:26,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:26,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:26,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:26,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:26,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:27,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 16 [2022-03-19 07:34:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 95 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-19 07:34:27,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:38,706 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_4103 (Array Int Int))) (let ((.cse1 (select v_ArrVal_4103 |main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4103) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 |c_main_~#vetor_vogais~0.offset|) .cse1) (< .cse1 (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 2)))))) is different from false [2022-03-19 07:34:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-19 07:34:38,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876127661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:38,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:38,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 16] total 54 [2022-03-19 07:34:38,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:38,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [639561992] [2022-03-19 07:34:38,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [639561992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:38,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:38,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 07:34:38,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330336607] [2022-03-19 07:34:38,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:38,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 07:34:38,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:38,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 07:34:38,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2434, Unknown=7, NotChecked=102, Total=2862 [2022-03-19 07:34:38,840 INFO L87 Difference]: Start difference. First operand 581 states and 692 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 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) [2022-03-19 07:34:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:41,761 INFO L93 Difference]: Finished difference Result 1862 states and 2209 transitions. [2022-03-19 07:34:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 07:34:41,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 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 102 [2022-03-19 07:34:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:41,765 INFO L225 Difference]: With dead ends: 1862 [2022-03-19 07:34:41,766 INFO L226 Difference]: Without dead ends: 1639 [2022-03-19 07:34:41,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=547, Invalid=5000, Unknown=7, NotChecked=146, Total=5700 [2022-03-19 07:34:41,766 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 309 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:41,767 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 114 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 07:34:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-03-19 07:34:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1032. [2022-03-19 07:34:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1027 states have (on average 1.1976630963972736) internal successors, (1230), 1027 states have internal predecessors, (1230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1234 transitions. [2022-03-19 07:34:42,851 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1234 transitions. Word has length 102 [2022-03-19 07:34:42,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:42,851 INFO L478 AbstractCegarLoop]: Abstraction has 1032 states and 1234 transitions. [2022-03-19 07:34:42,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 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) [2022-03-19 07:34:42,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1234 transitions. [2022-03-19 07:34:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:34:42,853 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:42,853 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:42,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-19 07:34:43,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:43,061 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:43,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1687964094, now seen corresponding path program 67 times [2022-03-19 07:34:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:43,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1573342213] [2022-03-19 07:34:43,062 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:43,062 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:43,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1687964094, now seen corresponding path program 68 times [2022-03-19 07:34:43,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:43,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008294404] [2022-03-19 07:34:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:43,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:44,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 125 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 07:34:44,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:44,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008294404] [2022-03-19 07:34:44,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008294404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:44,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385031424] [2022-03-19 07:34:44,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:34:44,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:44,104 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) [2022-03-19 07:34:44,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-19 07:34:44,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:34:44,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-19 07:34:44,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:44,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 07:34:44,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:44,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:44,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:44,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:44,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:44,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:44,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:44,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:44,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:44,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:44,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:34:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 43 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-19 07:34:45,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:46,041 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_4169 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4169) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_4169 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) is different from false [2022-03-19 07:34:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 8 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-19 07:34:46,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385031424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:46,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:46,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 14] total 45 [2022-03-19 07:34:46,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:46,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1573342213] [2022-03-19 07:34:46,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1573342213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:46,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:46,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 07:34:46,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036797414] [2022-03-19 07:34:46,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:46,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 07:34:46,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:46,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 07:34:46,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1696, Unknown=1, NotChecked=84, Total=1980 [2022-03-19 07:34:46,164 INFO L87 Difference]: Start difference. First operand 1032 states and 1234 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:51,373 INFO L93 Difference]: Finished difference Result 2777 states and 3309 transitions. [2022-03-19 07:34:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 07:34:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:34:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:51,380 INFO L225 Difference]: With dead ends: 2777 [2022-03-19 07:34:51,380 INFO L226 Difference]: Without dead ends: 2648 [2022-03-19 07:34:51,381 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=775, Invalid=5708, Unknown=1, NotChecked=158, Total=6642 [2022-03-19 07:34:51,381 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 467 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:51,381 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 67 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:34:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2022-03-19 07:34:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1495. [2022-03-19 07:34:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1490 states have (on average 1.2080536912751678) internal successors, (1800), 1490 states have internal predecessors, (1800), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 1804 transitions. [2022-03-19 07:34:53,095 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 1804 transitions. Word has length 102 [2022-03-19 07:34:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:34:53,095 INFO L478 AbstractCegarLoop]: Abstraction has 1495 states and 1804 transitions. [2022-03-19 07:34:53,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:34:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 1804 transitions. [2022-03-19 07:34:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:34:53,097 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:34:53,097 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:34:53,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-19 07:34:53,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:53,298 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:34:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:34:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2020197188, now seen corresponding path program 69 times [2022-03-19 07:34:53,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:53,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [127910113] [2022-03-19 07:34:53,299 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:34:53,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:34:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2020197188, now seen corresponding path program 70 times [2022-03-19 07:34:53,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:34:53,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377455231] [2022-03-19 07:34:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:34:53,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:34:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:34:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:34:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-03-19 07:34:53,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:34:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377455231] [2022-03-19 07:34:53,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377455231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:34:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082179059] [2022-03-19 07:34:53,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:34:53,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:34:53,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:34:53,423 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) [2022-03-19 07:34:53,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-19 07:34:53,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:34:53,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:34:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 07:34:53,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:34:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-03-19 07:34:54,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:34:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-03-19 07:34:54,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082179059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:34:54,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:34:54,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2022-03-19 07:34:54,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:34:54,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [127910113] [2022-03-19 07:34:54,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [127910113] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:34:54,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:34:54,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 07:34:54,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799027854] [2022-03-19 07:34:54,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:34:54,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 07:34:54,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:34:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 07:34:54,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-19 07:34:54,286 INFO L87 Difference]: Start difference. First operand 1495 states and 1804 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 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) [2022-03-19 07:34:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:34:59,843 INFO L93 Difference]: Finished difference Result 4338 states and 5267 transitions. [2022-03-19 07:34:59,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 07:34:59,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 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 102 [2022-03-19 07:34:59,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:34:59,856 INFO L225 Difference]: With dead ends: 4338 [2022-03-19 07:34:59,856 INFO L226 Difference]: Without dead ends: 4332 [2022-03-19 07:34:59,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:34:59,857 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 197 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:34:59,857 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 143 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:34:59,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2022-03-19 07:35:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3353. [2022-03-19 07:35:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3348 states have (on average 1.2144563918757467) internal successors, (4066), 3348 states have internal predecessors, (4066), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 4070 transitions. [2022-03-19 07:35:03,895 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 4070 transitions. Word has length 102 [2022-03-19 07:35:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:03,895 INFO L478 AbstractCegarLoop]: Abstraction has 3353 states and 4070 transitions. [2022-03-19 07:35:03,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 9 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) [2022-03-19 07:35:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 4070 transitions. [2022-03-19 07:35:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:35:03,899 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:03,900 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:03,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-19 07:35:04,115 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,SelfDestructingSolverStorable83 [2022-03-19 07:35:04,115 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:04,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:04,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1573170234, now seen corresponding path program 71 times [2022-03-19 07:35:04,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:04,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [528415678] [2022-03-19 07:35:04,117 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:04,117 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:04,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1573170234, now seen corresponding path program 72 times [2022-03-19 07:35:04,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:04,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046010527] [2022-03-19 07:35:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:04,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:04,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-19 07:35:04,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:04,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046010527] [2022-03-19 07:35:04,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046010527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:04,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498883983] [2022-03-19 07:35:04,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:35:04,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:04,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:04,601 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) [2022-03-19 07:35:04,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-19 07:35:05,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 07:35:05,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:05,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 07:35:05,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 61 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-03-19 07:35:06,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 07:35:09,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498883983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:09,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:09,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 16] total 40 [2022-03-19 07:35:09,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:09,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [528415678] [2022-03-19 07:35:09,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [528415678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:09,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:09,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 07:35:09,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314571886] [2022-03-19 07:35:09,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:09,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 07:35:09,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 07:35:09,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1344, Unknown=3, NotChecked=0, Total=1560 [2022-03-19 07:35:09,382 INFO L87 Difference]: Start difference. First operand 3353 states and 4070 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2022-03-19 07:35:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:13,717 INFO L93 Difference]: Finished difference Result 4761 states and 5766 transitions. [2022-03-19 07:35:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 07:35:13,718 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 102 [2022-03-19 07:35:13,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:13,725 INFO L225 Difference]: With dead ends: 4761 [2022-03-19 07:35:13,725 INFO L226 Difference]: Without dead ends: 3380 [2022-03-19 07:35:13,728 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=272, Invalid=1887, Unknown=3, NotChecked=0, Total=2162 [2022-03-19 07:35:13,729 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:13,729 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 58 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:35:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3380 states. [2022-03-19 07:35:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3380 to 3371. [2022-03-19 07:35:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3371 states, 3366 states have (on average 1.2118241235888294) internal successors, (4079), 3366 states have internal predecessors, (4079), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3371 states to 3371 states and 4083 transitions. [2022-03-19 07:35:17,729 INFO L78 Accepts]: Start accepts. Automaton has 3371 states and 4083 transitions. Word has length 102 [2022-03-19 07:35:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:17,729 INFO L478 AbstractCegarLoop]: Abstraction has 3371 states and 4083 transitions. [2022-03-19 07:35:17,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2022-03-19 07:35:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3371 states and 4083 transitions. [2022-03-19 07:35:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:35:17,734 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:17,734 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:17,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-19 07:35:17,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:17,941 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:17,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1220399798, now seen corresponding path program 73 times [2022-03-19 07:35:17,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:17,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001891136] [2022-03-19 07:35:17,943 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:17,943 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1220399798, now seen corresponding path program 74 times [2022-03-19 07:35:17,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:17,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303698553] [2022-03-19 07:35:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:17,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:18,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 113 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-03-19 07:35:18,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:18,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303698553] [2022-03-19 07:35:18,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303698553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:18,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061662707] [2022-03-19 07:35:18,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:35:18,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:18,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:18,624 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) [2022-03-19 07:35:18,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-19 07:35:18,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:35:18,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:18,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 07:35:18,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:19,665 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:35:19,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-03-19 07:35:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-19 07:35:19,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:20,245 INFO L356 Elim1Store]: treesize reduction 64, result has 60.7 percent of original size [2022-03-19 07:35:20,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 110 [2022-03-19 07:35:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 07:35:20,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061662707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:20,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:20,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 15] total 44 [2022-03-19 07:35:20,429 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:20,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001891136] [2022-03-19 07:35:20,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001891136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:20,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:20,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:35:20,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050870477] [2022-03-19 07:35:20,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:20,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:35:20,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:20,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:35:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 07:35:20,431 INFO L87 Difference]: Start difference. First operand 3371 states and 4083 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:29,317 INFO L93 Difference]: Finished difference Result 7225 states and 8647 transitions. [2022-03-19 07:35:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 07:35:29,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:35:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:29,326 INFO L225 Difference]: With dead ends: 7225 [2022-03-19 07:35:29,326 INFO L226 Difference]: Without dead ends: 5820 [2022-03-19 07:35:29,329 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=641, Invalid=5679, Unknown=0, NotChecked=0, Total=6320 [2022-03-19 07:35:29,329 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 167 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:29,329 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 82 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:35:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2022-03-19 07:35:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 3208. [2022-03-19 07:35:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3203 states have (on average 1.2119887605369966) internal successors, (3882), 3203 states have internal predecessors, (3882), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3886 transitions. [2022-03-19 07:35:33,348 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3886 transitions. Word has length 102 [2022-03-19 07:35:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:35:33,348 INFO L478 AbstractCegarLoop]: Abstraction has 3208 states and 3886 transitions. [2022-03-19 07:35:33,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:35:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3886 transitions. [2022-03-19 07:35:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:35:33,351 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:35:33,351 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:35:33,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-19 07:35:33,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:33,551 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:35:33,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:35:33,552 INFO L85 PathProgramCache]: Analyzing trace with hash -313195450, now seen corresponding path program 75 times [2022-03-19 07:35:33,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:33,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1264091971] [2022-03-19 07:35:33,552 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:35:33,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:35:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash -313195450, now seen corresponding path program 76 times [2022-03-19 07:35:33,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:35:33,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254328230] [2022-03-19 07:35:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:35:33,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:35:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:34,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:35:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:35:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 67 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-03-19 07:35:34,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:35:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254328230] [2022-03-19 07:35:34,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254328230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:35:34,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316868534] [2022-03-19 07:35:34,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:35:34,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:35:34,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:35:34,321 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) [2022-03-19 07:35:34,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-19 07:35:34,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:35:34,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:35:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 07:35:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:35:35,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 07:35:35,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 07:35:35,265 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:35:35,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 14 [2022-03-19 07:35:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-19 07:35:35,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:35:44,914 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-03-19 07:35:44,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-03-19 07:35:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 68 proven. 55 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 07:35:45,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316868534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:35:45,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:35:45,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 14] total 40 [2022-03-19 07:35:45,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:35:45,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1264091971] [2022-03-19 07:35:45,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1264091971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:35:45,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:35:45,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 07:35:45,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128522386] [2022-03-19 07:35:45,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:35:45,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 07:35:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:35:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 07:35:45,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1310, Unknown=16, NotChecked=0, Total=1560 [2022-03-19 07:35:45,045 INFO L87 Difference]: Start difference. First operand 3208 states and 3886 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2022-03-19 07:35:55,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:35:55,836 INFO L93 Difference]: Finished difference Result 8895 states and 10695 transitions. [2022-03-19 07:35:55,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 07:35:55,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 102 [2022-03-19 07:35:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:35:55,858 INFO L225 Difference]: With dead ends: 8895 [2022-03-19 07:35:55,858 INFO L226 Difference]: Without dead ends: 7066 [2022-03-19 07:35:55,862 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=820, Invalid=4134, Unknown=16, NotChecked=0, Total=4970 [2022-03-19 07:35:55,862 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 449 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:35:55,862 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 48 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:35:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7066 states. [2022-03-19 07:36:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7066 to 3705. [2022-03-19 07:36:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3700 states have (on average 1.194054054054054) internal successors, (4418), 3700 states have internal predecessors, (4418), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 4422 transitions. [2022-03-19 07:36:00,645 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 4422 transitions. Word has length 102 [2022-03-19 07:36:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:36:00,645 INFO L478 AbstractCegarLoop]: Abstraction has 3705 states and 4422 transitions. [2022-03-19 07:36:00,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2022-03-19 07:36:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 4422 transitions. [2022-03-19 07:36:00,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:36:00,648 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:36:00,648 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:36:00,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-19 07:36:00,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:00,849 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:36:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:36:00,849 INFO L85 PathProgramCache]: Analyzing trace with hash 781431434, now seen corresponding path program 77 times [2022-03-19 07:36:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:00,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [581266083] [2022-03-19 07:36:00,850 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:36:00,850 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:36:00,850 INFO L85 PathProgramCache]: Analyzing trace with hash 781431434, now seen corresponding path program 78 times [2022-03-19 07:36:00,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:36:00,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177731464] [2022-03-19 07:36:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:36:00,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:36:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:01,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:36:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 07:36:01,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:36:01,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177731464] [2022-03-19 07:36:01,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177731464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:36:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183969945] [2022-03-19 07:36:01,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:36:01,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:36:01,314 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) [2022-03-19 07:36:01,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-19 07:36:02,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 07:36:02,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:36:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-19 07:36:02,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:36:02,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 07:36:02,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:02,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:02,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:02,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:02,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:02,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:02,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:02,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:02,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:02,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:02,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-03-19 07:36:04,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-03-19 07:36:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 40 proven. 129 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-03-19 07:36:04,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:06,059 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4452 (Array Int Int))) (let ((.cse1 (select v_ArrVal_4452 |c_main_~#string_entrada~0.offset|)) (.cse0 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_4452) |c_main_~#vetor_vogais~0.base|))) (or (< (select .cse0 (+ |c_main_~#vetor_vogais~0.offset| 9)) .cse1) (< .cse1 (select .cse0 |c_main_~#vetor_vogais~0.offset|))))) is different from false [2022-03-19 07:36:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 129 refuted. 0 times theorem prover too weak. 173 trivial. 19 not checked. [2022-03-19 07:36:06,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183969945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:06,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:06,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 25] total 62 [2022-03-19 07:36:06,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:06,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [581266083] [2022-03-19 07:36:06,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [581266083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:06,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:06,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:36:06,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185909825] [2022-03-19 07:36:06,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:06,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:36:06,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:36:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=3110, Unknown=1, NotChecked=118, Total=3782 [2022-03-19 07:36:06,286 INFO L87 Difference]: Start difference. First operand 3705 states and 4422 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:36:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:36:12,525 INFO L93 Difference]: Finished difference Result 4479 states and 5345 transitions. [2022-03-19 07:36:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:36:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-03-19 07:36:12,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:36:12,533 INFO L225 Difference]: With dead ends: 4479 [2022-03-19 07:36:12,533 INFO L226 Difference]: Without dead ends: 4188 [2022-03-19 07:36:12,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=707, Invalid=4846, Unknown=1, NotChecked=146, Total=5700 [2022-03-19 07:36:12,535 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 79 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:36:12,535 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 105 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:36:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2022-03-19 07:36:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3747. [2022-03-19 07:36:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3742 states have (on average 1.196151790486371) internal successors, (4476), 3742 states have internal predecessors, (4476), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 4480 transitions. [2022-03-19 07:36:17,416 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 4480 transitions. Word has length 102 [2022-03-19 07:36:17,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:36:17,416 INFO L478 AbstractCegarLoop]: Abstraction has 3747 states and 4480 transitions. [2022-03-19 07:36:17,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:36:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 4480 transitions. [2022-03-19 07:36:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:36:17,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:36:17,420 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:36:17,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-19 07:36:17,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:17,620 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:36:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:36:17,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1047935946, now seen corresponding path program 1 times [2022-03-19 07:36:17,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:17,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015727820] [2022-03-19 07:36:17,621 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:36:17,621 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:36:17,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1047935946, now seen corresponding path program 2 times [2022-03-19 07:36:17,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:36:17,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429248561] [2022-03-19 07:36:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:36:17,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:36:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:18,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:36:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-03-19 07:36:18,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:36:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429248561] [2022-03-19 07:36:18,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429248561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:36:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086803562] [2022-03-19 07:36:18,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:36:18,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:18,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:36:18,309 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) [2022-03-19 07:36:18,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-19 07:36:18,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:36:18,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:36:18,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 07:36:18,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:36:19,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 07:36:19,025 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-19 07:36:19,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 07:36:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:36:19,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:19,257 INFO L356 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2022-03-19 07:36:19,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 65 [2022-03-19 07:36:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:36:19,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086803562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:19,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:19,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 25 [2022-03-19 07:36:19,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:19,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015727820] [2022-03-19 07:36:19,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015727820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:19,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:19,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 07:36:19,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291961572] [2022-03-19 07:36:19,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:19,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 07:36:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:19,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 07:36:19,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:36:19,354 INFO L87 Difference]: Start difference. First operand 3747 states and 4480 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2022-03-19 07:36:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:36:27,474 INFO L93 Difference]: Finished difference Result 6289 states and 7484 transitions. [2022-03-19 07:36:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 07:36:27,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 102 [2022-03-19 07:36:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:36:27,485 INFO L225 Difference]: With dead ends: 6289 [2022-03-19 07:36:27,485 INFO L226 Difference]: Without dead ends: 5229 [2022-03-19 07:36:27,488 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 197 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=509, Invalid=1561, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 07:36:27,488 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 260 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:36:27,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 52 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:36:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2022-03-19 07:36:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 3360. [2022-03-19 07:36:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3355 states have (on average 1.1907600596125187) internal successors, (3995), 3355 states have internal predecessors, (3995), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 3999 transitions. [2022-03-19 07:36:32,018 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 3999 transitions. Word has length 102 [2022-03-19 07:36:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:36:32,018 INFO L478 AbstractCegarLoop]: Abstraction has 3360 states and 3999 transitions. [2022-03-19 07:36:32,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2022-03-19 07:36:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 3999 transitions. [2022-03-19 07:36:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:36:32,021 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:36:32,021 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:36:32,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-19 07:36:32,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:32,221 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:36:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:36:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1192547638, now seen corresponding path program 79 times [2022-03-19 07:36:32,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:32,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [570344148] [2022-03-19 07:36:32,222 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:36:32,222 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:36:32,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1192547638, now seen corresponding path program 80 times [2022-03-19 07:36:32,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:36:32,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837716646] [2022-03-19 07:36:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:36:32,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:36:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:32,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:36:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 43 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-19 07:36:32,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:36:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837716646] [2022-03-19 07:36:32,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837716646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:36:32,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227791617] [2022-03-19 07:36:32,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:36:32,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:32,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:36:32,669 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) [2022-03-19 07:36:32,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-19 07:36:32,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:36:32,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:36:32,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 07:36:32,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:36:33,326 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 07:36:33,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-19 07:36:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:36:33,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:33,583 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-19 07:36:33,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-19 07:36:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:36:33,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227791617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:33,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:33,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 30 [2022-03-19 07:36:33,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:33,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [570344148] [2022-03-19 07:36:33,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [570344148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:33,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:33,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:36:33,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380966711] [2022-03-19 07:36:33,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:33,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:36:33,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:36:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-03-19 07:36:33,701 INFO L87 Difference]: Start difference. First operand 3360 states and 3999 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:36:41,508 INFO L93 Difference]: Finished difference Result 5781 states and 6927 transitions. [2022-03-19 07:36:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 07:36:41,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:36:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:36:41,515 INFO L225 Difference]: With dead ends: 5781 [2022-03-19 07:36:41,515 INFO L226 Difference]: Without dead ends: 5430 [2022-03-19 07:36:41,516 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 07:36:41,516 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 84 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:36:41,516 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 73 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:36:41,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2022-03-19 07:36:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 5429. [2022-03-19 07:36:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5429 states, 5424 states have (on average 1.1952433628318584) internal successors, (6483), 5424 states have internal predecessors, (6483), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5429 states to 5429 states and 6487 transitions. [2022-03-19 07:36:48,777 INFO L78 Accepts]: Start accepts. Automaton has 5429 states and 6487 transitions. Word has length 102 [2022-03-19 07:36:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:36:48,777 INFO L478 AbstractCegarLoop]: Abstraction has 5429 states and 6487 transitions. [2022-03-19 07:36:48,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:36:48,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5429 states and 6487 transitions. [2022-03-19 07:36:48,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:36:48,781 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:36:48,781 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:36:48,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-19 07:36:48,982 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-19 07:36:48,982 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:36:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:36:48,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1367909450, now seen corresponding path program 81 times [2022-03-19 07:36:48,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:48,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475684421] [2022-03-19 07:36:48,983 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:36:48,983 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:36:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1367909450, now seen corresponding path program 82 times [2022-03-19 07:36:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:36:48,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408099901] [2022-03-19 07:36:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:36:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:36:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:49,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:36:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:36:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 86 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-19 07:36:49,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:36:49,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408099901] [2022-03-19 07:36:49,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408099901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:36:49,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648763387] [2022-03-19 07:36:49,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:36:49,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:36:49,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:36:49,521 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) [2022-03-19 07:36:49,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-19 07:36:49,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:36:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:36:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 07:36:49,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:36:50,159 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 07:36:50,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-19 07:36:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-03-19 07:36:50,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:36:50,403 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-19 07:36:50,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-19 07:36:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:36:50,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648763387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:36:50,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:36:50,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 31 [2022-03-19 07:36:50,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:36:50,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475684421] [2022-03-19 07:36:50,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475684421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:36:50,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:36:50,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:36:50,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751650325] [2022-03-19 07:36:50,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:36:50,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:36:50,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:36:50,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:36:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-03-19 07:36:50,483 INFO L87 Difference]: Start difference. First operand 5429 states and 6487 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:37:04,536 INFO L93 Difference]: Finished difference Result 10767 states and 12807 transitions. [2022-03-19 07:37:04,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:37:04,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:37:04,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:37:04,552 INFO L225 Difference]: With dead ends: 10767 [2022-03-19 07:37:04,552 INFO L226 Difference]: Without dead ends: 9712 [2022-03-19 07:37:04,556 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 07:37:04,557 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 247 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:37:04,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 56 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:37:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9712 states. [2022-03-19 07:37:13,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9712 to 6745. [2022-03-19 07:37:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6740 states have (on average 1.1945103857566766) internal successors, (8051), 6740 states have internal predecessors, (8051), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 8055 transitions. [2022-03-19 07:37:13,552 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 8055 transitions. Word has length 102 [2022-03-19 07:37:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:37:13,552 INFO L478 AbstractCegarLoop]: Abstraction has 6745 states and 8055 transitions. [2022-03-19 07:37:13,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 8055 transitions. [2022-03-19 07:37:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:37:13,557 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:37:13,557 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:37:13,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-19 07:37:13,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:37:13,767 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:37:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:37:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash 717887750, now seen corresponding path program 83 times [2022-03-19 07:37:13,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:13,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831520428] [2022-03-19 07:37:13,768 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:37:13,768 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:37:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash 717887750, now seen corresponding path program 84 times [2022-03-19 07:37:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:37:13,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856493341] [2022-03-19 07:37:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:37:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:37:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:37:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 107 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-03-19 07:37:14,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:37:14,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856493341] [2022-03-19 07:37:14,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856493341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:37:14,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404688871] [2022-03-19 07:37:14,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:37:14,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:37:14,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:37:14,352 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) [2022-03-19 07:37:14,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-19 07:37:14,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:37:14,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:37:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 07:37:14,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:37:15,068 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 07:37:15,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-19 07:37:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:37:15,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:37:15,322 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-19 07:37:15,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-19 07:37:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:37:15,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404688871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:37:15,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:37:15,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 9] total 33 [2022-03-19 07:37:15,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:37:15,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831520428] [2022-03-19 07:37:15,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831520428] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:37:15,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:37:15,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 07:37:15,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546677002] [2022-03-19 07:37:15,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:37:15,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 07:37:15,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:15,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 07:37:15,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 07:37:15,408 INFO L87 Difference]: Start difference. First operand 6745 states and 8055 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:37:31,194 INFO L93 Difference]: Finished difference Result 12002 states and 14266 transitions. [2022-03-19 07:37:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 07:37:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:37:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:37:31,206 INFO L225 Difference]: With dead ends: 12002 [2022-03-19 07:37:31,206 INFO L226 Difference]: Without dead ends: 10959 [2022-03-19 07:37:31,208 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2022-03-19 07:37:31,209 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 338 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:37:31,209 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 57 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:37:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10959 states. [2022-03-19 07:37:41,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10959 to 8229. [2022-03-19 07:37:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8224 states have (on average 1.1904182879377432) internal successors, (9790), 8224 states have internal predecessors, (9790), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 9794 transitions. [2022-03-19 07:37:41,942 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 9794 transitions. Word has length 102 [2022-03-19 07:37:41,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:37:41,942 INFO L478 AbstractCegarLoop]: Abstraction has 8229 states and 9794 transitions. [2022-03-19 07:37:41,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:37:41,942 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 9794 transitions. [2022-03-19 07:37:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:37:41,947 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:37:41,947 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:37:41,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-19 07:37:42,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:37:42,148 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:37:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:37:42,148 INFO L85 PathProgramCache]: Analyzing trace with hash 639581642, now seen corresponding path program 85 times [2022-03-19 07:37:42,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:42,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975295659] [2022-03-19 07:37:42,149 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:37:42,149 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:37:42,149 INFO L85 PathProgramCache]: Analyzing trace with hash 639581642, now seen corresponding path program 86 times [2022-03-19 07:37:42,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:37:42,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200559474] [2022-03-19 07:37:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:37:42,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:37:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:42,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:37:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:37:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 128 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-03-19 07:37:42,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:37:42,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200559474] [2022-03-19 07:37:42,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200559474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:37:42,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489425047] [2022-03-19 07:37:42,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:37:42,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:37:42,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:37:42,860 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) [2022-03-19 07:37:42,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-19 07:37:43,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:37:43,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:37:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 07:37:43,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:37:43,545 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 07:37:43,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-19 07:37:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:37:43,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:37:43,822 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-19 07:37:43,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-19 07:37:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:37:43,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489425047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:37:43,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:37:43,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 9] total 35 [2022-03-19 07:37:43,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:37:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975295659] [2022-03-19 07:37:43,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975295659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:37:43,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:37:43,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 07:37:43,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024636228] [2022-03-19 07:37:43,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:37:43,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 07:37:43,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:37:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 07:37:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:37:43,908 INFO L87 Difference]: Start difference. First operand 8229 states and 9794 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:38:01,941 INFO L93 Difference]: Finished difference Result 13381 states and 15863 transitions. [2022-03-19 07:38:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 07:38:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:38:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:38:01,956 INFO L225 Difference]: With dead ends: 13381 [2022-03-19 07:38:01,957 INFO L226 Difference]: Without dead ends: 12350 [2022-03-19 07:38:01,959 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=389, Invalid=2367, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 07:38:01,960 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 317 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:38:01,960 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 68 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:38:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12350 states. [2022-03-19 07:38:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12350 to 9611. [2022-03-19 07:38:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9611 states, 9606 states have (on average 1.189256714553404) internal successors, (11424), 9606 states have internal predecessors, (11424), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9611 states to 9611 states and 11428 transitions. [2022-03-19 07:38:14,305 INFO L78 Accepts]: Start accepts. Automaton has 9611 states and 11428 transitions. Word has length 102 [2022-03-19 07:38:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:38:14,305 INFO L478 AbstractCegarLoop]: Abstraction has 9611 states and 11428 transitions. [2022-03-19 07:38:14,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 9611 states and 11428 transitions. [2022-03-19 07:38:14,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:38:14,313 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:38:14,313 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:38:14,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-19 07:38:14,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:14,513 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:38:14,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:38:14,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1747587194, now seen corresponding path program 87 times [2022-03-19 07:38:14,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:14,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [132738663] [2022-03-19 07:38:14,515 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:38:14,515 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:38:14,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1747587194, now seen corresponding path program 88 times [2022-03-19 07:38:14,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:38:14,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683410236] [2022-03-19 07:38:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:38:14,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:38:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:15,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:38:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 149 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-19 07:38:15,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:38:15,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683410236] [2022-03-19 07:38:15,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683410236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:38:15,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113667368] [2022-03-19 07:38:15,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:38:15,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:15,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:38:15,257 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) [2022-03-19 07:38:15,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-19 07:38:15,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:38:15,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:38:15,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 07:38:15,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:38:15,947 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 07:38:15,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-19 07:38:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-03-19 07:38:15,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:38:16,213 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-19 07:38:16,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-19 07:38:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:38:16,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113667368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:38:16,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:38:16,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10, 9] total 37 [2022-03-19 07:38:16,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:38:16,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [132738663] [2022-03-19 07:38:16,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [132738663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:38:16,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:38:16,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 07:38:16,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255111736] [2022-03-19 07:38:16,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:38:16,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 07:38:16,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:16,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 07:38:16,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 07:38:16,300 INFO L87 Difference]: Start difference. First operand 9611 states and 11428 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:35,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:38:35,721 INFO L93 Difference]: Finished difference Result 14679 states and 17385 transitions. [2022-03-19 07:38:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 07:38:35,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:38:35,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:38:35,736 INFO L225 Difference]: With dead ends: 14679 [2022-03-19 07:38:35,736 INFO L226 Difference]: Without dead ends: 13660 [2022-03-19 07:38:35,738 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=429, Invalid=2763, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 07:38:35,738 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 344 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 07:38:35,738 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 77 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 07:38:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13660 states. [2022-03-19 07:38:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13660 to 10981. [2022-03-19 07:38:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10981 states, 10976 states have (on average 1.188411078717201) internal successors, (13044), 10976 states have internal predecessors, (13044), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10981 states to 10981 states and 13048 transitions. [2022-03-19 07:38:49,831 INFO L78 Accepts]: Start accepts. Automaton has 10981 states and 13048 transitions. Word has length 102 [2022-03-19 07:38:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:38:49,832 INFO L478 AbstractCegarLoop]: Abstraction has 10981 states and 13048 transitions. [2022-03-19 07:38:49,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:38:49,832 INFO L276 IsEmpty]: Start isEmpty. Operand 10981 states and 13048 transitions. [2022-03-19 07:38:49,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:38:49,840 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:38:49,840 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:38:49,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-19 07:38:50,041 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:50,041 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:38:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:38:50,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1445242374, now seen corresponding path program 89 times [2022-03-19 07:38:50,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:50,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294588404] [2022-03-19 07:38:50,042 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:38:50,042 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:38:50,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1445242374, now seen corresponding path program 90 times [2022-03-19 07:38:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:38:50,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836960315] [2022-03-19 07:38:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:38:50,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:38:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:50,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:38:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:38:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 44 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-19 07:38:50,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:38:50,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836960315] [2022-03-19 07:38:50,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836960315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:38:50,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036883134] [2022-03-19 07:38:50,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:38:50,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:38:50,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:38:50,488 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) [2022-03-19 07:38:50,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-19 07:38:50,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 07:38:50,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:38:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 07:38:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:38:51,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 07:38:51,348 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 07:38:51,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-19 07:38:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 36 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-03-19 07:38:51,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:38:51,590 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-19 07:38:51,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-19 07:38:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:38:51,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036883134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:38:51,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:38:51,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 25 [2022-03-19 07:38:51,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:38:51,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294588404] [2022-03-19 07:38:51,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294588404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:38:51,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:38:51,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 07:38:51,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712463534] [2022-03-19 07:38:51,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:38:51,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 07:38:51,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:38:51,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 07:38:51,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-03-19 07:38:51,681 INFO L87 Difference]: Start difference. First operand 10981 states and 13048 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:39:10,266 INFO L93 Difference]: Finished difference Result 14554 states and 17182 transitions. [2022-03-19 07:39:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 07:39:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:39:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:39:10,284 INFO L225 Difference]: With dead ends: 14554 [2022-03-19 07:39:10,285 INFO L226 Difference]: Without dead ends: 13406 [2022-03-19 07:39:10,289 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 07:39:10,289 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 179 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:39:10,289 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 58 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:39:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13406 states. [2022-03-19 07:39:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13406 to 11672. [2022-03-19 07:39:25,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11672 states, 11667 states have (on average 1.187794634439016) internal successors, (13858), 11667 states have internal predecessors, (13858), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11672 states to 11672 states and 13862 transitions. [2022-03-19 07:39:25,523 INFO L78 Accepts]: Start accepts. Automaton has 11672 states and 13862 transitions. Word has length 102 [2022-03-19 07:39:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:39:25,523 INFO L478 AbstractCegarLoop]: Abstraction has 11672 states and 13862 transitions. [2022-03-19 07:39:25,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:39:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand 11672 states and 13862 transitions. [2022-03-19 07:39:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:39:25,532 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:39:25,532 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:39:25,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-19 07:39:25,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:39:25,733 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:39:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:39:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash 168583758, now seen corresponding path program 91 times [2022-03-19 07:39:25,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:39:25,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2022789789] [2022-03-19 07:39:25,734 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:39:25,734 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:39:25,734 INFO L85 PathProgramCache]: Analyzing trace with hash 168583758, now seen corresponding path program 92 times [2022-03-19 07:39:25,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:39:25,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85598475] [2022-03-19 07:39:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:39:25,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:39:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:39:26,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:39:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:39:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 7 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-19 07:39:26,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:39:26,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85598475] [2022-03-19 07:39:26,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85598475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:39:26,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615454716] [2022-03-19 07:39:26,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:39:26,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:39:26,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:39:26,075 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) [2022-03-19 07:39:26,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-19 07:39:26,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:39:26,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:39:26,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 07:39:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:39:26,891 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:39:26,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 07:39:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-19 07:39:26,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:39:31,503 INFO L356 Elim1Store]: treesize reduction 31, result has 68.0 percent of original size [2022-03-19 07:39:31,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 73 [2022-03-19 07:39:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 68 proven. 55 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 07:39:31,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615454716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:39:31,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:39:31,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 35 [2022-03-19 07:39:31,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:39:31,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2022789789] [2022-03-19 07:39:31,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2022789789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:39:31,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:39:31,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 07:39:31,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775882374] [2022-03-19 07:39:31,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:39:31,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 07:39:31,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:39:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 07:39:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1047, Unknown=7, NotChecked=0, Total=1190 [2022-03-19 07:39:31,643 INFO L87 Difference]: Start difference. First operand 11672 states and 13862 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2022-03-19 07:39:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:39:46,557 INFO L93 Difference]: Finished difference Result 15014 states and 17795 transitions. [2022-03-19 07:39:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 07:39:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 102 [2022-03-19 07:39:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:39:46,569 INFO L225 Difference]: With dead ends: 15014 [2022-03-19 07:39:46,569 INFO L226 Difference]: Without dead ends: 11159 [2022-03-19 07:39:46,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=190, Invalid=1525, Unknown=7, NotChecked=0, Total=1722 [2022-03-19 07:39:46,617 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:39:46,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 65 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:39:46,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11159 states. [2022-03-19 07:40:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11159 to 11141. [2022-03-19 07:40:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11141 states, 11136 states have (on average 1.1848958333333333) internal successors, (13195), 11136 states have internal predecessors, (13195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11141 states to 11141 states and 13199 transitions. [2022-03-19 07:40:01,065 INFO L78 Accepts]: Start accepts. Automaton has 11141 states and 13199 transitions. Word has length 102 [2022-03-19 07:40:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:40:01,065 INFO L478 AbstractCegarLoop]: Abstraction has 11141 states and 13199 transitions. [2022-03-19 07:40:01,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2022-03-19 07:40:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 11141 states and 13199 transitions. [2022-03-19 07:40:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:40:01,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:40:01,071 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:40:01,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-19 07:40:01,272 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,SelfDestructingSolverStorable95 [2022-03-19 07:40:01,272 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:40:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:40:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 201885714, now seen corresponding path program 93 times [2022-03-19 07:40:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:01,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [707126690] [2022-03-19 07:40:01,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:40:01,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:40:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash 201885714, now seen corresponding path program 94 times [2022-03-19 07:40:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:40:01,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133437971] [2022-03-19 07:40:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:40:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:40:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:01,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:40:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-03-19 07:40:01,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:40:01,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133437971] [2022-03-19 07:40:01,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133437971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:40:01,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691827860] [2022-03-19 07:40:01,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:40:01,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:40:01,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:40:01,719 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) [2022-03-19 07:40:01,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-19 07:40:02,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:40:02,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:40:02,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 07:40:02,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:40:03,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 07:40:03,677 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:40:03,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-03-19 07:40:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 266 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 07:40:03,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:40:11,944 INFO L356 Elim1Store]: treesize reduction 31, result has 68.0 percent of original size [2022-03-19 07:40:11,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 73 [2022-03-19 07:40:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 170 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-19 07:40:12,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691827860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:40:12,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:40:12,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 35, 26] total 73 [2022-03-19 07:40:12,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:40:12,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [707126690] [2022-03-19 07:40:12,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [707126690] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:40:12,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:40:12,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 07:40:12,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309887998] [2022-03-19 07:40:12,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:40:12,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 07:40:12,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:12,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 07:40:12,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=4752, Unknown=11, NotChecked=0, Total=5256 [2022-03-19 07:40:12,223 INFO L87 Difference]: Start difference. First operand 11141 states and 13199 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:40:27,861 INFO L93 Difference]: Finished difference Result 14829 states and 17528 transitions. [2022-03-19 07:40:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 07:40:27,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:40:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:40:27,876 INFO L225 Difference]: With dead ends: 14829 [2022-03-19 07:40:27,876 INFO L226 Difference]: Without dead ends: 11353 [2022-03-19 07:40:27,882 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=642, Invalid=6487, Unknown=11, NotChecked=0, Total=7140 [2022-03-19 07:40:27,882 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:40:27,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 90 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:40:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11353 states. [2022-03-19 07:40:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11353 to 10772. [2022-03-19 07:40:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10767 states have (on average 1.191232469582985) internal successors, (12826), 10767 states have internal predecessors, (12826), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 12830 transitions. [2022-03-19 07:40:42,281 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 12830 transitions. Word has length 102 [2022-03-19 07:40:42,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:40:42,281 INFO L478 AbstractCegarLoop]: Abstraction has 10772 states and 12830 transitions. [2022-03-19 07:40:42,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:40:42,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 12830 transitions. [2022-03-19 07:40:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:40:42,287 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:40:42,287 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:40:42,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-19 07:40:42,487 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,SelfDestructingSolverStorable96 [2022-03-19 07:40:42,488 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:40:42,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:40:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1771781870, now seen corresponding path program 95 times [2022-03-19 07:40:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:42,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [708061479] [2022-03-19 07:40:42,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:40:42,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:40:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1771781870, now seen corresponding path program 96 times [2022-03-19 07:40:42,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:40:42,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975302436] [2022-03-19 07:40:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:40:42,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:40:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:43,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:40:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:40:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-03-19 07:40:43,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:40:43,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975302436] [2022-03-19 07:40:43,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975302436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:40:43,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898511399] [2022-03-19 07:40:43,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:40:43,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:40:43,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:40:43,019 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) [2022-03-19 07:40:43,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-19 07:40:44,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-19 07:40:44,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:40:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 07:40:44,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:40:44,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-03-19 07:40:44,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:44,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:44,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:44,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:44,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:44,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:44,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:44,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:44,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:44,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:44,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-03-19 07:40:46,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-19 07:40:46,904 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 07:40:46,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 43 [2022-03-19 07:40:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 18 proven. 94 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-19 07:40:47,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:40:50,722 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_mod_aux_mod_main_~j~0_32_52 Int) (v_ArrVal_5004 (Array Int Int)) (aux_div_aux_mod_main_~j~0_32_52 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_main_~j~0_32_52 4294967296) aux_mod_aux_mod_main_~j~0_32_52)) (.cse1 (select v_ArrVal_5004 |c_main_~#string_entrada~0.offset|)) (.cse2 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_5004) |c_main_~#vetor_vogais~0.base|))) (or (<= 8589934591 .cse0) (< .cse0 4294967305) (< aux_mod_aux_mod_main_~j~0_32_52 0) (= .cse1 0) (< (select .cse2 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= 10 aux_mod_aux_mod_main_~j~0_32_52) (< .cse1 (select .cse2 (+ (mod aux_mod_aux_mod_main_~j~0_32_52 4294967296) |c_main_~#vetor_vogais~0.offset|))) (not (= (select v_ArrVal_5004 (+ |c_main_~#string_entrada~0.offset| 1)) 0))))) is different from false [2022-03-19 07:40:52,119 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((aux_mod_aux_mod_main_~j~0_32_52 Int) (v_ArrVal_5004 (Array Int Int)) (aux_div_aux_mod_main_~j~0_32_52 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_main_~j~0_32_52 4294967296) aux_mod_aux_mod_main_~j~0_32_52)) (.cse1 (select v_ArrVal_5004 |c_main_~#string_entrada~0.offset|)) (.cse2 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_5004) |c_main_~#vetor_vogais~0.base|))) (or (<= 8589934591 .cse0) (< .cse0 4294967305) (< aux_mod_aux_mod_main_~j~0_32_52 0) (= .cse1 0) (< (select .cse2 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= 10 aux_mod_aux_mod_main_~j~0_32_52) (< .cse1 (select .cse2 (+ (mod aux_mod_aux_mod_main_~j~0_32_52 4294967296) |c_main_~#vetor_vogais~0.offset|))) (not (= (select v_ArrVal_5004 (+ |c_main_~#string_entrada~0.offset| 1)) 0)))))) is different from false [2022-03-19 07:40:52,207 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((aux_mod_aux_mod_main_~j~0_32_52 Int) (v_ArrVal_5004 (Array Int Int)) (aux_div_aux_mod_main_~j~0_32_52 Int)) (let ((.cse0 (+ (* aux_div_aux_mod_main_~j~0_32_52 4294967296) aux_mod_aux_mod_main_~j~0_32_52)) (.cse1 (select v_ArrVal_5004 |c_main_~#string_entrada~0.offset|)) (.cse2 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_5004) |c_main_~#vetor_vogais~0.base|))) (or (<= 8589934591 .cse0) (< .cse0 4294967305) (< aux_mod_aux_mod_main_~j~0_32_52 0) (= .cse1 0) (< (select .cse2 (+ |c_main_~#vetor_vogais~0.offset| 1)) .cse1) (<= 10 aux_mod_aux_mod_main_~j~0_32_52) (< .cse1 (select .cse2 (+ (mod aux_mod_aux_mod_main_~j~0_32_52 4294967296) |c_main_~#vetor_vogais~0.offset|))) (not (= (select v_ArrVal_5004 (+ |c_main_~#string_entrada~0.offset| 1)) 0)))))) is different from false [2022-03-19 07:40:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 230 trivial. 44 not checked. [2022-03-19 07:40:52,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898511399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:40:52,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:40:52,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 24] total 62 [2022-03-19 07:40:52,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:40:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [708061479] [2022-03-19 07:40:52,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [708061479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:40:52,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:40:52,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 07:40:52,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411324181] [2022-03-19 07:40:52,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:40:52,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 07:40:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:40:52,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 07:40:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=2939, Unknown=3, NotChecked=348, Total=3782 [2022-03-19 07:40:52,319 INFO L87 Difference]: Start difference. First operand 10772 states and 12830 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:41:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:41:08,440 INFO L93 Difference]: Finished difference Result 11550 states and 13749 transitions. [2022-03-19 07:41:08,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:41:08,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 102 [2022-03-19 07:41:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:41:08,453 INFO L225 Difference]: With dead ends: 11550 [2022-03-19 07:41:08,454 INFO L226 Difference]: Without dead ends: 10979 [2022-03-19 07:41:08,456 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=627, Invalid=4638, Unknown=3, NotChecked=432, Total=5700 [2022-03-19 07:41:08,456 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 84 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 07:41:08,456 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 97 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 07:41:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2022-03-19 07:41:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 10529. [2022-03-19 07:41:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10529 states, 10524 states have (on average 1.1952679589509692) internal successors, (12579), 10524 states have internal predecessors, (12579), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10529 states to 10529 states and 12583 transitions. [2022-03-19 07:41:22,406 INFO L78 Accepts]: Start accepts. Automaton has 10529 states and 12583 transitions. Word has length 102 [2022-03-19 07:41:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:41:22,406 INFO L478 AbstractCegarLoop]: Abstraction has 10529 states and 12583 transitions. [2022-03-19 07:41:22,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-03-19 07:41:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 10529 states and 12583 transitions. [2022-03-19 07:41:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:41:22,412 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:41:22,412 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:41:22,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-19 07:41:22,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:41:22,613 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:41:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:41:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1680669622, now seen corresponding path program 97 times [2022-03-19 07:41:22,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:41:22,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2141148687] [2022-03-19 07:41:22,614 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:41:22,614 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:41:22,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1680669622, now seen corresponding path program 98 times [2022-03-19 07:41:22,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:41:22,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747527593] [2022-03-19 07:41:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:41:22,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:41:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:41:23,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:41:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:41:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 86 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-19 07:41:23,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:41:23,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747527593] [2022-03-19 07:41:23,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747527593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:41:23,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992922517] [2022-03-19 07:41:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 07:41:23,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:41:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:41:23,166 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) [2022-03-19 07:41:23,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-19 07:41:23,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 07:41:23,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:41:23,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 07:41:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:41:23,839 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 07:41:23,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-19 07:41:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:41:23,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:41:24,098 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-19 07:41:24,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-19 07:41:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:41:24,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992922517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:41:24,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:41:24,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 31 [2022-03-19 07:41:24,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:41:24,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2141148687] [2022-03-19 07:41:24,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2141148687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:41:24,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:41:24,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 07:41:24,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242284837] [2022-03-19 07:41:24,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:41:24,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 07:41:24,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:41:24,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 07:41:24,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-03-19 07:41:24,209 INFO L87 Difference]: Start difference. First operand 10529 states and 12583 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:41:41,887 INFO L93 Difference]: Finished difference Result 13369 states and 15961 transitions. [2022-03-19 07:41:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 07:41:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-19 07:41:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:41:41,900 INFO L225 Difference]: With dead ends: 13369 [2022-03-19 07:41:41,900 INFO L226 Difference]: Without dead ends: 11988 [2022-03-19 07:41:41,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 07:41:41,903 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 209 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 07:41:41,903 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 61 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 07:41:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11988 states. [2022-03-19 07:41:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11988 to 10475. [2022-03-19 07:41:55,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10475 states, 10470 states have (on average 1.1917860553963706) internal successors, (12478), 10470 states have internal predecessors, (12478), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10475 states to 10475 states and 12482 transitions. [2022-03-19 07:41:55,614 INFO L78 Accepts]: Start accepts. Automaton has 10475 states and 12482 transitions. Word has length 102 [2022-03-19 07:41:55,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:41:55,614 INFO L478 AbstractCegarLoop]: Abstraction has 10475 states and 12482 transitions. [2022-03-19 07:41:55,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:41:55,615 INFO L276 IsEmpty]: Start isEmpty. Operand 10475 states and 12482 transitions. [2022-03-19 07:41:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:41:55,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:41:55,622 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:41:55,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-19 07:41:55,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:41:55,846 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:41:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:41:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 879787466, now seen corresponding path program 99 times [2022-03-19 07:41:55,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:41:55,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [796858987] [2022-03-19 07:41:55,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:41:55,847 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:41:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 879787466, now seen corresponding path program 100 times [2022-03-19 07:41:55,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:41:55,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428992561] [2022-03-19 07:41:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:41:55,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:41:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:41:56,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:41:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:41:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-03-19 07:41:56,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:41:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428992561] [2022-03-19 07:41:56,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428992561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:41:56,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148156582] [2022-03-19 07:41:56,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 07:41:56,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:41:56,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:41:56,217 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) [2022-03-19 07:41:56,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-19 07:41:56,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 07:41:56,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:41:56,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 07:41:56,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:41:56,917 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-19 07:41:56,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-19 07:41:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-03-19 07:41:56,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:41:57,178 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-03-19 07:41:57,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-03-19 07:41:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 07:41:57,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148156582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:41:57,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:41:57,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-03-19 07:41:57,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:41:57,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [796858987] [2022-03-19 07:41:57,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [796858987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:41:57,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:41:57,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 07:41:57,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646269338] [2022-03-19 07:41:57,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:41:57,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 07:41:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:41:57,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 07:41:57,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-19 07:41:57,282 INFO L87 Difference]: Start difference. First operand 10475 states and 12482 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2022-03-19 07:42:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 07:42:11,644 INFO L93 Difference]: Finished difference Result 10948 states and 13029 transitions. [2022-03-19 07:42:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 07:42:11,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 102 [2022-03-19 07:42:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 07:42:11,655 INFO L225 Difference]: With dead ends: 10948 [2022-03-19 07:42:11,656 INFO L226 Difference]: Without dead ends: 10621 [2022-03-19 07:42:11,657 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 07:42:11,657 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 07:42:11,657 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 61 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 07:42:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10621 states. [2022-03-19 07:42:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10621 to 10478. [2022-03-19 07:42:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10478 states, 10473 states have (on average 1.190871765492218) internal successors, (12472), 10473 states have internal predecessors, (12472), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 07:42:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10478 states to 10478 states and 12476 transitions. [2022-03-19 07:42:25,442 INFO L78 Accepts]: Start accepts. Automaton has 10478 states and 12476 transitions. Word has length 102 [2022-03-19 07:42:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 07:42:25,442 INFO L478 AbstractCegarLoop]: Abstraction has 10478 states and 12476 transitions. [2022-03-19 07:42:25,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2022-03-19 07:42:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 10478 states and 12476 transitions. [2022-03-19 07:42:25,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-19 07:42:25,447 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 07:42:25,447 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 07:42:25,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-19 07:42:25,647 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,SelfDestructingSolverStorable99 [2022-03-19 07:42:25,648 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 07:42:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 07:42:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048434, now seen corresponding path program 101 times [2022-03-19 07:42:25,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 07:42:25,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1628471429] [2022-03-19 07:42:25,649 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-19 07:42:25,649 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 07:42:25,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2054048434, now seen corresponding path program 102 times [2022-03-19 07:42:25,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 07:42:25,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649482859] [2022-03-19 07:42:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 07:42:25,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 07:42:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:42:27,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 07:42:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 07:42:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 76 proven. 185 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-19 07:42:27,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 07:42:27,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649482859] [2022-03-19 07:42:27,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649482859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 07:42:27,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098999713] [2022-03-19 07:42:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 07:42:27,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 07:42:27,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 07:42:27,389 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) [2022-03-19 07:42:27,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-19 07:42:28,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-19 07:42:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 07:42:28,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 07:42:28,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 07:42:28,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-19 07:42:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 85 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-03-19 07:42:29,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 07:42:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 82 proven. 55 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-03-19 07:42:46,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098999713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 07:42:46,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 07:42:46,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 20, 17] total 64 [2022-03-19 07:42:46,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 07:42:46,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1628471429] [2022-03-19 07:42:46,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1628471429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 07:42:46,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 07:42:46,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-19 07:42:46,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384842153] [2022-03-19 07:42:46,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 07:42:46,513 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-19 07:42:46,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 07:42:46,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-19 07:42:46,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=3630, Unknown=18, NotChecked=0, Total=4032 [2022-03-19 07:42:46,513 INFO L87 Difference]: Start difference. First operand 10478 states and 12476 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)