/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:10:36,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:10:36,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:10:36,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:10:36,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:10:36,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:10:36,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:10:36,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:10:36,354 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:10:36,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:10:36,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:10:36,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:10:36,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:10:36,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:10:36,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:10:36,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:10:36,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:10:36,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:10:36,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:10:36,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:10:36,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:10:36,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:10:36,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:10:36,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:10:36,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:10:36,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:10:36,358 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:10:36,358 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:10:36,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:10:36,358 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:10:36,358 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:10:36,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:10:36,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:10:36,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:10:36,523 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:10:36,524 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:10:36,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-04-06 20:10:36,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eba59a0fe/767a0213395d4a9682ba0bde6729c951/FLAG4cb90abe1 [2022-04-06 20:10:36,916 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:10:36,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-04-06 20:10:36,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eba59a0fe/767a0213395d4a9682ba0bde6729c951/FLAG4cb90abe1 [2022-04-06 20:10:37,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eba59a0fe/767a0213395d4a9682ba0bde6729c951 [2022-04-06 20:10:37,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:10:37,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:10:37,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:10:37,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:10:37,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:10:37,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:10:37" (1/1) ... [2022-04-06 20:10:37,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab5961b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37, skipping insertion in model container [2022-04-06 20:10:37,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:10:37" (1/1) ... [2022-04-06 20:10:37,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:10:37,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:10:37,492 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-04-06 20:10:37,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:10:37,508 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:10:37,517 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-04-06 20:10:37,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:10:37,527 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:10:37,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37 WrapperNode [2022-04-06 20:10:37,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:10:37,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:10:37,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:10:37,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:10:37,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37" (1/1) ... [2022-04-06 20:10:37,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37" (1/1) ... [2022-04-06 20:10:37,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37" (1/1) ... [2022-04-06 20:10:37,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37" (1/1) ... [2022-04-06 20:10:37,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37" (1/1) ... [2022-04-06 20:10:37,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37" (1/1) ... [2022-04-06 20:10:37,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37" (1/1) ... [2022-04-06 20:10:37,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:10:37,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:10:37,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:10:37,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:10:37,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37" (1/1) ... [2022-04-06 20:10:37,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:10:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:37,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 20:10:37,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 20:10:37,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:10:37,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:10:37,612 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:10:37,613 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 20:10:37,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:10:37,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:10:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-04-06 20:10:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:10:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:10:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 20:10:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 20:10:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:10:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:10:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 20:10:37,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:10:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 20:10:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:10:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-04-06 20:10:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:10:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:10:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:10:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:10:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:10:37,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:10:37,664 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:10:37,665 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:10:37,750 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:10:37,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:10:37,755 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 20:10:37,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:10:37 BoogieIcfgContainer [2022-04-06 20:10:37,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:10:37,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:10:37,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:10:37,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:10:37,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:10:37" (1/3) ... [2022-04-06 20:10:37,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26be6362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:10:37, skipping insertion in model container [2022-04-06 20:10:37,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:10:37" (2/3) ... [2022-04-06 20:10:37,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26be6362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:10:37, skipping insertion in model container [2022-04-06 20:10:37,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:10:37" (3/3) ... [2022-04-06 20:10:37,783 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2022-04-06 20:10:37,786 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:10:37,786 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:10:37,812 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:10:37,824 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 20:10:37,824 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:10:37,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:10:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:10:37,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:37,853 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:37,854 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1868594418, now seen corresponding path program 1 times [2022-04-06 20:10:37,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:37,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [451697641] [2022-04-06 20:10:37,870 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:10:37,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1868594418, now seen corresponding path program 2 times [2022-04-06 20:10:37,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:37,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897551555] [2022-04-06 20:10:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:37,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:38,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:38,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:38,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897551555] [2022-04-06 20:10:38,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897551555] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:38,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:38,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:10:38,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:38,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [451697641] [2022-04-06 20:10:38,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [451697641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:38,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:38,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:10:38,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551185150] [2022-04-06 20:10:38,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:38,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:10:38,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:38,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:10:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:10:38,131 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:38,245 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-04-06 20:10:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:10:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 20:10:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:38,257 INFO L225 Difference]: With dead ends: 48 [2022-04-06 20:10:38,257 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 20:10:38,260 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:10:38,262 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:38,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 39 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 20:10:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-06 20:10:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:10:38,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-04-06 20:10:38,293 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-04-06 20:10:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:38,293 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-04-06 20:10:38,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-04-06 20:10:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:10:38,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:38,294 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:38,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:10:38,294 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:38,295 INFO L85 PathProgramCache]: Analyzing trace with hash -426319892, now seen corresponding path program 1 times [2022-04-06 20:10:38,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:38,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [887978465] [2022-04-06 20:10:38,302 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:38,302 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:38,302 INFO L85 PathProgramCache]: Analyzing trace with hash -426319892, now seen corresponding path program 2 times [2022-04-06 20:10:38,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:38,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901019072] [2022-04-06 20:10:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:38,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:38,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:38,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:38,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901019072] [2022-04-06 20:10:38,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901019072] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:38,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98089738] [2022-04-06 20:10:38,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:38,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:38,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:38,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:38,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:10:38,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:38,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:10:38,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:38,717 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 11 treesize of output 7 [2022-04-06 20:10:38,774 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 15 treesize of output 7 [2022-04-06 20:10:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:38,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:38,880 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 14 treesize of output 12 [2022-04-06 20:10:38,884 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 22 treesize of output 20 [2022-04-06 20:10:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:38,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98089738] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:38,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:38,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-04-06 20:10:38,924 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:38,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [887978465] [2022-04-06 20:10:38,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [887978465] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:38,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:38,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:10:38,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619962157] [2022-04-06 20:10:38,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:38,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:10:38,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:10:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:10:38,930 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:39,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:39,100 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-04-06 20:10:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:10:39,101 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 20:10:39,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:39,102 INFO L225 Difference]: With dead ends: 32 [2022-04-06 20:10:39,102 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 20:10:39,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:10:39,107 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:39,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 20:10:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-04-06 20:10:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:10:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-04-06 20:10:39,119 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2022-04-06 20:10:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:39,120 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-04-06 20:10:39,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-04-06 20:10:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:10:39,120 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:39,121 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:39,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 20:10:39,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:39,336 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:39,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1328899642, now seen corresponding path program 1 times [2022-04-06 20:10:39,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:39,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1324307841] [2022-04-06 20:10:39,338 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:39,338 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:39,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1328899642, now seen corresponding path program 2 times [2022-04-06 20:10:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:39,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518563353] [2022-04-06 20:10:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:39,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:39,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:39,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 20:10:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:39,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:39,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518563353] [2022-04-06 20:10:39,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518563353] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:39,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375580025] [2022-04-06 20:10:39,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:39,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:39,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:39,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:39,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:10:39,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:39,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:39,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:10:39,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:39,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:39,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375580025] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:39,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:39,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-04-06 20:10:39,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:39,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1324307841] [2022-04-06 20:10:39,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1324307841] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:39,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:39,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:10:39,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982505797] [2022-04-06 20:10:39,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:39,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:10:39,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:39,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:10:39,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:10:39,608 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:10:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:39,692 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-04-06 20:10:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:10:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-06 20:10:39,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:39,694 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:10:39,694 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 20:10:39,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:10:39,696 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:39,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:10:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 20:10:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-04-06 20:10:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:10:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-04-06 20:10:39,703 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-04-06 20:10:39,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:39,703 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-04-06 20:10:39,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:10:39,703 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-04-06 20:10:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:10:39,704 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:39,704 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:39,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:39,939 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,SelfDestructingSolverStorable2 [2022-04-06 20:10:39,939 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:39,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1936590556, now seen corresponding path program 3 times [2022-04-06 20:10:39,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:39,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2003212586] [2022-04-06 20:10:39,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:39,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1936590556, now seen corresponding path program 4 times [2022-04-06 20:10:39,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:39,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531088421] [2022-04-06 20:10:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:39,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:40,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:40,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 20:10:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:40,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:40,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531088421] [2022-04-06 20:10:40,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531088421] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:40,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951519600] [2022-04-06 20:10:40,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:40,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:40,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:40,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:40,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:10:40,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:40,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:10:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:40,145 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 15 treesize of output 11 [2022-04-06 20:10:40,447 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:10:40,447 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 23 treesize of output 10 [2022-04-06 20:10:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:10:40,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:40,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951519600] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:40,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:10:40,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-04-06 20:10:40,578 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:40,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2003212586] [2022-04-06 20:10:40,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2003212586] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:40,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:40,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:10:40,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980719011] [2022-04-06 20:10:40,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:40,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:10:40,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:10:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:10:40,580 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:10:40,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:40,812 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-04-06 20:10:40,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:10:40,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-04-06 20:10:40,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:40,813 INFO L225 Difference]: With dead ends: 42 [2022-04-06 20:10:40,813 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:10:40,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:10:40,814 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:40,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:10:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-04-06 20:10:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:10:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-04-06 20:10:40,819 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 26 [2022-04-06 20:10:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:40,819 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-04-06 20:10:40,819 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:10:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-04-06 20:10:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:10:40,820 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:40,820 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:40,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:41,030 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:41,030 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1234500350, now seen corresponding path program 5 times [2022-04-06 20:10:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:41,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [587153476] [2022-04-06 20:10:41,032 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:41,032 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1234500350, now seen corresponding path program 6 times [2022-04-06 20:10:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832658114] [2022-04-06 20:10:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:41,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:41,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 20:10:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:41,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:10:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:10:41,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:41,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832658114] [2022-04-06 20:10:41,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832658114] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:41,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86339359] [2022-04-06 20:10:41,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:41,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:41,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:41,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:41,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:10:41,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:10:41,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:41,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:10:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:10:41,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:10:41,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86339359] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:41,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:41,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-04-06 20:10:41,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:41,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [587153476] [2022-04-06 20:10:41,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [587153476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:41,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:41,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:10:41,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103922448] [2022-04-06 20:10:41,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:41,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:10:41,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:41,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:10:41,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:10:41,307 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:10:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:41,422 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-04-06 20:10:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:10:41,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-04-06 20:10:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:41,424 INFO L225 Difference]: With dead ends: 60 [2022-04-06 20:10:41,424 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:10:41,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:10:41,427 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:41,427 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 44 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:10:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-04-06 20:10:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:10:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-04-06 20:10:41,440 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-04-06 20:10:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:41,440 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-04-06 20:10:41,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:10:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-04-06 20:10:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:10:41,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:41,441 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:41,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:41,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:41,655 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash -487899940, now seen corresponding path program 7 times [2022-04-06 20:10:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [555681442] [2022-04-06 20:10:41,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:41,657 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:41,657 INFO L85 PathProgramCache]: Analyzing trace with hash -487899940, now seen corresponding path program 8 times [2022-04-06 20:10:41,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:41,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90610424] [2022-04-06 20:10:41,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:41,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:41,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:41,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 20:10:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:41,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 20:10:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:10:41,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:41,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90610424] [2022-04-06 20:10:41,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90610424] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:41,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412748771] [2022-04-06 20:10:41,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:41,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:41,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:41,829 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:41,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:10:41,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:41,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:41,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:10:41,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:41,938 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 15 treesize of output 11 [2022-04-06 20:10:42,345 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:10:42,345 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 23 treesize of output 10 [2022-04-06 20:10:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:10:42,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:42,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412748771] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:42,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:10:42,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-04-06 20:10:42,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:42,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [555681442] [2022-04-06 20:10:42,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [555681442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:42,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:42,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:10:42,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330497249] [2022-04-06 20:10:42,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:42,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:10:42,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:42,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:10:42,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:10:42,499 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:10:42,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:42,767 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-04-06 20:10:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:10:42,767 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-04-06 20:10:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:42,768 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:10:42,768 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:10:42,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:10:42,769 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:42,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 65 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:10:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-04-06 20:10:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 20:10:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-04-06 20:10:42,775 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 36 [2022-04-06 20:10:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:42,775 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-04-06 20:10:42,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:10:42,775 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-04-06 20:10:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:10:42,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:42,776 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:42,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:42,992 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:42,992 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1322580298, now seen corresponding path program 9 times [2022-04-06 20:10:42,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:42,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [348125412] [2022-04-06 20:10:42,994 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:42,994 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1322580298, now seen corresponding path program 10 times [2022-04-06 20:10:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:42,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336459019] [2022-04-06 20:10:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:43,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:43,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 20:10:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:43,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 20:10:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:43,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 20:10:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:10:43,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:43,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336459019] [2022-04-06 20:10:43,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336459019] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:43,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971278531] [2022-04-06 20:10:43,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:43,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:43,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:43,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:43,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:10:43,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:43,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:43,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:10:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:10:43,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:10:43,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971278531] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:43,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:43,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-04-06 20:10:43,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:43,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [348125412] [2022-04-06 20:10:43,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [348125412] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:43,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:43,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:10:43,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362587731] [2022-04-06 20:10:43,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:43,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:10:43,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:10:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:10:43,355 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:10:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:43,514 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-04-06 20:10:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:10:43,515 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 44 [2022-04-06 20:10:43,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:43,515 INFO L225 Difference]: With dead ends: 74 [2022-04-06 20:10:43,515 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:10:43,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:10:43,516 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:43,517 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 46 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:10:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 20:10:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 20:10:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-04-06 20:10:43,522 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-04-06 20:10:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:43,523 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-04-06 20:10:43,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:10:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-04-06 20:10:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:10:43,523 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:43,524 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:43,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:43,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:43,758 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:43,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:43,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1186401044, now seen corresponding path program 11 times [2022-04-06 20:10:43,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:43,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900261046] [2022-04-06 20:10:43,759 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:43,759 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:43,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1186401044, now seen corresponding path program 12 times [2022-04-06 20:10:43,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:43,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775730905] [2022-04-06 20:10:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:43,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:43,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:43,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 20:10:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:43,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 20:10:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:43,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 20:10:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:10:43,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:43,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775730905] [2022-04-06 20:10:43,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775730905] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:43,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799852663] [2022-04-06 20:10:43,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:43,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:43,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:43,939 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:43,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:10:43,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:10:43,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:43,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:10:43,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:44,051 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 15 treesize of output 11 [2022-04-06 20:10:44,665 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:10:44,665 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 23 treesize of output 10 [2022-04-06 20:10:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:10:44,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:44,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799852663] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:44,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:10:44,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-04-06 20:10:44,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:44,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900261046] [2022-04-06 20:10:44,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900261046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:44,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:44,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:10:44,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527888228] [2022-04-06 20:10:44,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:44,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:10:44,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:44,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:10:44,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:10:44,807 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:10:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:45,185 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2022-04-06 20:10:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:10:45,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2022-04-06 20:10:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:45,187 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:10:45,187 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 20:10:45,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:10:45,188 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:45,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 80 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 20:10:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-04-06 20:10:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 20:10:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-04-06 20:10:45,207 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 46 [2022-04-06 20:10:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:45,207 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-04-06 20:10:45,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 20:10:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-04-06 20:10:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:10:45,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:45,208 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:45,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:45,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:45,421 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:45,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1707008786, now seen corresponding path program 13 times [2022-04-06 20:10:45,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:45,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638727943] [2022-04-06 20:10:45,422 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:45,423 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:45,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1707008786, now seen corresponding path program 14 times [2022-04-06 20:10:45,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:45,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417536464] [2022-04-06 20:10:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:45,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:45,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:45,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 20:10:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:45,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 20:10:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:45,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 20:10:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:45,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 20:10:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:10:45,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:45,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417536464] [2022-04-06 20:10:45,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417536464] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:45,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925636049] [2022-04-06 20:10:45,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:45,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:45,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:45,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:45,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:10:45,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:10:45,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:10:45,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:10:45,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925636049] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:45,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:45,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-04-06 20:10:45,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:45,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638727943] [2022-04-06 20:10:45,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638727943] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:45,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:45,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:10:45,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702963117] [2022-04-06 20:10:45,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:45,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:10:45,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:45,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:10:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:10:45,862 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 20:10:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:46,057 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-04-06 20:10:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:10:46,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2022-04-06 20:10:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:46,058 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:10:46,058 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 20:10:46,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:10:46,059 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:46,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 48 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 20:10:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-06 20:10:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 20:10:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-04-06 20:10:46,065 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-04-06 20:10:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:46,065 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-04-06 20:10:46,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 20:10:46,066 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-04-06 20:10:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:10:46,066 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:46,066 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:46,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:46,267 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,SelfDestructingSolverStorable8 [2022-04-06 20:10:46,267 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:46,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:46,267 INFO L85 PathProgramCache]: Analyzing trace with hash -275659828, now seen corresponding path program 15 times [2022-04-06 20:10:46,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:46,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1422001813] [2022-04-06 20:10:46,268 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:46,268 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash -275659828, now seen corresponding path program 16 times [2022-04-06 20:10:46,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:46,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937553470] [2022-04-06 20:10:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:46,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:46,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:46,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 20:10:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:46,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 20:10:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:46,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 20:10:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:46,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 20:10:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:10:46,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937553470] [2022-04-06 20:10:46,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937553470] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485461736] [2022-04-06 20:10:46,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:46,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:46,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:46,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:46,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:10:46,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:46,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:46,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:10:46,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:46,578 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 15 treesize of output 11 [2022-04-06 20:10:47,337 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:10:47,337 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 23 treesize of output 10 [2022-04-06 20:10:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 20:10:47,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:47,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485461736] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:47,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:10:47,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2022-04-06 20:10:47,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:47,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1422001813] [2022-04-06 20:10:47,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1422001813] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:47,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:47,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:10:47,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129653365] [2022-04-06 20:10:47,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:47,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:10:47,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:47,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:10:47,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:10:47,682 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 20:10:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:48,187 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-04-06 20:10:48,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:10:48,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 56 [2022-04-06 20:10:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:48,188 INFO L225 Difference]: With dead ends: 72 [2022-04-06 20:10:48,188 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:10:48,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=251, Invalid=2401, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:10:48,189 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:48,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 95 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:10:48,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:10:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-04-06 20:10:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 20:10:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-04-06 20:10:48,195 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 56 [2022-04-06 20:10:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:48,195 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-04-06 20:10:48,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 20:10:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-04-06 20:10:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:10:48,196 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:48,196 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:48,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:48,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 20:10:48,405 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:48,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1978425946, now seen corresponding path program 17 times [2022-04-06 20:10:48,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:48,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [955703531] [2022-04-06 20:10:48,407 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:48,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:48,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1978425946, now seen corresponding path program 18 times [2022-04-06 20:10:48,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:48,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392865607] [2022-04-06 20:10:48,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:48,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:48,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:48,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 20:10:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:48,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 20:10:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:48,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 20:10:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:48,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 20:10:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:48,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 20:10:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:10:48,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:48,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392865607] [2022-04-06 20:10:48,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392865607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:48,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868259760] [2022-04-06 20:10:48,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:48,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:48,539 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:48,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:10:48,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:10:48,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:48,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:10:48,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:10:48,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:10:48,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868259760] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:48,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:48,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-04-06 20:10:48,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:48,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [955703531] [2022-04-06 20:10:48,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [955703531] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:48,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:48,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:10:48,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933306809] [2022-04-06 20:10:48,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:48,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:10:48,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:48,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:10:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:10:48,922 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 20:10:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:49,133 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-04-06 20:10:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:10:49,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 64 [2022-04-06 20:10:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:49,134 INFO L225 Difference]: With dead ends: 102 [2022-04-06 20:10:49,134 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:10:49,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:10:49,135 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:49,135 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:10:49,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-04-06 20:10:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 20:10:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-04-06 20:10:49,142 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-04-06 20:10:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:49,142 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-04-06 20:10:49,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 20:10:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-04-06 20:10:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:10:49,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:49,143 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:49,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:49,359 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,SelfDestructingSolverStorable10 [2022-04-06 20:10:49,360 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash -442513660, now seen corresponding path program 19 times [2022-04-06 20:10:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:49,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1534284500] [2022-04-06 20:10:49,361 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:49,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:49,361 INFO L85 PathProgramCache]: Analyzing trace with hash -442513660, now seen corresponding path program 20 times [2022-04-06 20:10:49,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:49,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209778800] [2022-04-06 20:10:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:49,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:49,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:49,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:10:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:49,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 20:10:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:49,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 20:10:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:49,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 20:10:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:49,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 20:10:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:10:49,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:49,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209778800] [2022-04-06 20:10:49,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209778800] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:49,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687130863] [2022-04-06 20:10:49,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:49,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:49,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:49,563 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:49,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:10:49,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:49,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:49,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:10:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:49,712 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 15 treesize of output 11 [2022-04-06 20:10:50,770 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:10:50,770 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 23 treesize of output 10 [2022-04-06 20:10:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:10:50,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:50,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687130863] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:50,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:10:50,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2022-04-06 20:10:50,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:50,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1534284500] [2022-04-06 20:10:50,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1534284500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:50,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:50,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:10:50,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215535898] [2022-04-06 20:10:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:50,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:10:50,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:10:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:10:50,916 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 20:10:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:51,489 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2022-04-06 20:10:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:10:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 66 [2022-04-06 20:10:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:51,491 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:10:51,492 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:10:51,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=3011, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:10:51,493 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:51,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 102 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:10:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:10:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-04-06 20:10:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:10:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-04-06 20:10:51,500 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 66 [2022-04-06 20:10:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:51,501 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-04-06 20:10:51,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 20:10:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-04-06 20:10:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 20:10:51,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:51,501 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:51,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:51,702 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,SelfDestructingSolverStorable11 [2022-04-06 20:10:51,702 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:51,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash -832116514, now seen corresponding path program 21 times [2022-04-06 20:10:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:51,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1977865893] [2022-04-06 20:10:51,704 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:51,704 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:51,704 INFO L85 PathProgramCache]: Analyzing trace with hash -832116514, now seen corresponding path program 22 times [2022-04-06 20:10:51,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:51,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14952408] [2022-04-06 20:10:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:51,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:51,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:51,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:10:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:51,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 20:10:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:51,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 20:10:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:51,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 20:10:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:51,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 20:10:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:51,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 20:10:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 20:10:51,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:51,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14952408] [2022-04-06 20:10:51,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14952408] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:51,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840912804] [2022-04-06 20:10:51,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:51,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:51,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:51,881 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:51,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:10:51,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:51,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:51,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:10:51,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 20:10:52,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 20:10:52,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840912804] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:52,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:52,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-04-06 20:10:52,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1977865893] [2022-04-06 20:10:52,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1977865893] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:52,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:52,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:10:52,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074348932] [2022-04-06 20:10:52,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:52,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:10:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:10:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:10:52,296 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 20:10:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:52,610 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2022-04-06 20:10:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:10:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 74 [2022-04-06 20:10:52,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:52,612 INFO L225 Difference]: With dead ends: 116 [2022-04-06 20:10:52,612 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:10:52,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:10:52,614 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:52,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 62 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:10:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-04-06 20:10:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:10:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-04-06 20:10:52,632 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-04-06 20:10:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:52,633 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-04-06 20:10:52,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 20:10:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-04-06 20:10:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 20:10:52,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:52,634 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:52,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:52,847 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,SelfDestructingSolverStorable12 [2022-04-06 20:10:52,847 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2005759164, now seen corresponding path program 23 times [2022-04-06 20:10:52,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:52,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1366690597] [2022-04-06 20:10:52,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:52,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:52,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2005759164, now seen corresponding path program 24 times [2022-04-06 20:10:52,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:52,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51390560] [2022-04-06 20:10:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:52,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 20:10:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 20:10:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 20:10:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 20:10:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 20:10:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 20:10:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 20:10:53,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:53,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51390560] [2022-04-06 20:10:53,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51390560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:53,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874275476] [2022-04-06 20:10:53,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:53,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:53,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:53,148 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:53,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:10:53,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:10:53,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:53,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:10:53,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:53,379 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 15 treesize of output 11 [2022-04-06 20:10:54,805 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:10:54,806 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 23 treesize of output 10 [2022-04-06 20:10:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 20:10:54,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:54,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874275476] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:54,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:10:54,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2022-04-06 20:10:54,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:54,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1366690597] [2022-04-06 20:10:54,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1366690597] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:54,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:54,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:10:55,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433695250] [2022-04-06 20:10:55,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:55,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:10:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:10:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:10:55,001 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 20:10:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:55,856 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-04-06 20:10:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:10:55,857 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 76 [2022-04-06 20:10:55,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:55,858 INFO L225 Difference]: With dead ends: 92 [2022-04-06 20:10:55,858 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 20:10:55,859 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 64 SyntacticMatches, 12 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=343, Invalid=3689, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:10:55,860 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:55,860 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 117 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:10:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 20:10:55,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-04-06 20:10:55,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 20:10:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-04-06 20:10:55,870 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 76 [2022-04-06 20:10:55,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:55,871 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-04-06 20:10:55,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 20:10:55,871 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-04-06 20:10:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 20:10:55,871 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:55,871 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:55,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:56,095 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,SelfDestructingSolverStorable13 [2022-04-06 20:10:56,096 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:56,096 INFO L85 PathProgramCache]: Analyzing trace with hash -209232234, now seen corresponding path program 25 times [2022-04-06 20:10:56,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:56,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1828406541] [2022-04-06 20:10:56,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:56,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:56,097 INFO L85 PathProgramCache]: Analyzing trace with hash -209232234, now seen corresponding path program 26 times [2022-04-06 20:10:56,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:56,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071309960] [2022-04-06 20:10:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:56,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:56,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:56,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 20:10:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:56,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 20:10:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:56,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 20:10:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:56,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 20:10:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:56,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 20:10:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:56,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 20:10:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:56,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 20:10:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 87 proven. 74 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:10:56,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:56,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071309960] [2022-04-06 20:10:56,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071309960] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:56,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194620201] [2022-04-06 20:10:56,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:56,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:56,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:56,293 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:56,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:10:56,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:10:56,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:10:56,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:10:56,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194620201] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:56,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:56,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-04-06 20:10:56,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:56,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1828406541] [2022-04-06 20:10:56,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1828406541] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:56,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:56,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:10:56,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664703357] [2022-04-06 20:10:56,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:56,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:10:56,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:56,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:10:56,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:10:56,826 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:10:57,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:57,196 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2022-04-06 20:10:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:10:57,196 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 84 [2022-04-06 20:10:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:57,197 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:10:57,197 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 20:10:57,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:10:57,199 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:57,199 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 59 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 20:10:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-04-06 20:10:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 20:10:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-04-06 20:10:57,212 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-04-06 20:10:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:57,212 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-04-06 20:10:57,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:10:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-04-06 20:10:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 20:10:57,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:57,213 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:57,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:57,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:57,436 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:57,436 INFO L85 PathProgramCache]: Analyzing trace with hash 814689524, now seen corresponding path program 27 times [2022-04-06 20:10:57,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:57,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1388976268] [2022-04-06 20:10:57,437 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:10:57,437 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:57,437 INFO L85 PathProgramCache]: Analyzing trace with hash 814689524, now seen corresponding path program 28 times [2022-04-06 20:10:57,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:57,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643808418] [2022-04-06 20:10:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:57,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 20:10:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 20:10:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 20:10:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 20:10:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 20:10:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 20:10:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 20:10:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:10:57,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:57,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643808418] [2022-04-06 20:10:57,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643808418] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:57,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846839184] [2022-04-06 20:10:57,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:57,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:57,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:57,784 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:57,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:10:57,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:57,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:57,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:10:57,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:58,073 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 15 treesize of output 11 [2022-04-06 20:10:59,434 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:10:59,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-04-06 20:10:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 91 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:10:59,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:59,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846839184] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:59,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:10:59,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2022-04-06 20:10:59,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:59,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1388976268] [2022-04-06 20:10:59,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1388976268] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:59,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:59,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:10:59,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287260949] [2022-04-06 20:10:59,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:59,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:10:59,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:59,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:10:59,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:10:59,600 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:11:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:00,453 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2022-04-06 20:11:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:11:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 86 [2022-04-06 20:11:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:00,455 INFO L225 Difference]: With dead ends: 102 [2022-04-06 20:11:00,455 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:11:00,456 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 72 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=395, Invalid=4435, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:11:00,457 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 65 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:00,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 124 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:11:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:11:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-04-06 20:11:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 20:11:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-04-06 20:11:00,484 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 86 [2022-04-06 20:11:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:00,484 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-04-06 20:11:00,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 20:11:00,485 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-04-06 20:11:00,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 20:11:00,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:00,485 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:00,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:00,702 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,SelfDestructingSolverStorable15 [2022-04-06 20:11:00,702 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:00,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1169596722, now seen corresponding path program 29 times [2022-04-06 20:11:00,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:00,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [829823575] [2022-04-06 20:11:00,703 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:11:00,703 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:00,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1169596722, now seen corresponding path program 30 times [2022-04-06 20:11:00,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:00,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032847409] [2022-04-06 20:11:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:00,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 20:11:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 20:11:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 20:11:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 20:11:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 20:11:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 20:11:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 20:11:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 20:11:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 115 proven. 93 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:11:00,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:00,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032847409] [2022-04-06 20:11:00,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032847409] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:00,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067439679] [2022-04-06 20:11:00,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:11:00,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:00,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:00,905 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:00,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:11:00,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:11:00,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:00,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:11:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:11:01,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:11:01,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067439679] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:01,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:01,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-04-06 20:11:01,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:01,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [829823575] [2022-04-06 20:11:01,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [829823575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:01,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:01,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:11:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982140514] [2022-04-06 20:11:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:01,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:11:01,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:11:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:11:01,444 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 20:11:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:01,802 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2022-04-06 20:11:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:11:01,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 94 [2022-04-06 20:11:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:01,804 INFO L225 Difference]: With dead ends: 144 [2022-04-06 20:11:01,804 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:11:01,807 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=490, Invalid=2162, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:11:01,807 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:01,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 61 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:11:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-04-06 20:11:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 20:11:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-04-06 20:11:01,820 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-04-06 20:11:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:01,820 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-04-06 20:11:01,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 20:11:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-04-06 20:11:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-06 20:11:01,821 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:01,821 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:01,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:02,040 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,SelfDestructingSolverStorable16 [2022-04-06 20:11:02,040 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:02,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:02,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1315000236, now seen corresponding path program 31 times [2022-04-06 20:11:02,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:02,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1123137397] [2022-04-06 20:11:02,042 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:11:02,042 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:02,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1315000236, now seen corresponding path program 32 times [2022-04-06 20:11:02,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:02,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289550111] [2022-04-06 20:11:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:02,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:02,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:02,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 20:11:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:02,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 20:11:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:02,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 20:11:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:02,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 20:11:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:02,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 20:11:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:02,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 20:11:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:02,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 20:11:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:02,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 20:11:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:11:02,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:02,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289550111] [2022-04-06 20:11:02,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289550111] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:02,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433012663] [2022-04-06 20:11:02,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:11:02,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:02,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:02,419 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:02,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:11:02,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:11:02,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:02,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:11:02,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:02,551 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 15 treesize of output 11 [2022-04-06 20:12:40,639 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 19 treesize of output 7 [2022-04-06 20:12:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:12:40,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:42,844 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 14 [2022-04-06 20:12:42,846 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 28 treesize of output 24 [2022-04-06 20:12:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:12:42,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433012663] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:42,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:42,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 38 [2022-04-06 20:12:42,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:42,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1123137397] [2022-04-06 20:12:42,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1123137397] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:42,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:42,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:12:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094841342] [2022-04-06 20:12:42,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:42,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:12:42,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:12:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1291, Unknown=9, NotChecked=0, Total=1406 [2022-04-06 20:12:42,911 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 20:12:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:43,821 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2022-04-06 20:12:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:12:43,822 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 96 [2022-04-06 20:12:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:43,822 INFO L225 Difference]: With dead ends: 112 [2022-04-06 20:12:43,822 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 20:12:43,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 178 SyntacticMatches, 20 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 100.5s TimeCoverageRelationStatistics Valid=244, Invalid=3529, Unknown=9, NotChecked=0, Total=3782 [2022-04-06 20:12:43,824 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:43,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 135 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:12:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 20:12:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-04-06 20:12:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 20:12:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-04-06 20:12:43,835 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 96 [2022-04-06 20:12:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:43,835 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-04-06 20:12:43,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 20:12:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-04-06 20:12:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 20:12:43,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:43,836 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:43,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:12:44,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:12:44,052 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1911993978, now seen corresponding path program 33 times [2022-04-06 20:12:44,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:44,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931217040] [2022-04-06 20:12:44,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:12:44,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:44,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1911993978, now seen corresponding path program 34 times [2022-04-06 20:12:44,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:44,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399389494] [2022-04-06 20:12:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:44,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 20:12:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 20:12:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 20:12:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 20:12:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 20:12:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 20:12:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 20:12:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 20:12:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 20:12:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 147 proven. 114 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 20:12:44,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:44,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399389494] [2022-04-06 20:12:44,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399389494] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:44,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942514053] [2022-04-06 20:12:44,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:12:44,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:44,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:44,257 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:12:44,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:12:44,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:12:44,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:44,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:12:44,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 180 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 20:12:44,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 180 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 20:12:44,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942514053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:44,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:44,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-04-06 20:12:44,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931217040] [2022-04-06 20:12:44,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931217040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:44,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:44,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:12:44,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563018397] [2022-04-06 20:12:44,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:44,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:12:44,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:44,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:12:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:12:44,961 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 20:12:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:45,388 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-04-06 20:12:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:12:45,389 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 104 [2022-04-06 20:12:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:45,390 INFO L225 Difference]: With dead ends: 158 [2022-04-06 20:12:45,390 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 20:12:45,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=582, Invalid=2610, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:12:45,392 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:45,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:12:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 20:12:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-04-06 20:12:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 20:12:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-04-06 20:12:45,404 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-04-06 20:12:45,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:45,404 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-04-06 20:12:45,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 20:12:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-04-06 20:12:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 20:12:45,405 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:45,405 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:45,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:12:45,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:45,612 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1220002588, now seen corresponding path program 35 times [2022-04-06 20:12:45,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:45,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2096749880] [2022-04-06 20:12:45,613 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:12:45,613 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1220002588, now seen corresponding path program 36 times [2022-04-06 20:12:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:45,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076910990] [2022-04-06 20:12:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:45,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:45,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 20:12:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:45,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 20:12:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:45,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 20:12:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:45,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 20:12:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:46,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 20:12:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:46,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 20:12:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:46,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 20:12:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:46,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 20:12:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:46,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 20:12:46,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 18 proven. 262 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 20:12:46,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:46,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076910990] [2022-04-06 20:12:46,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076910990] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:46,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050639027] [2022-04-06 20:12:46,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:12:46,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:46,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:46,019 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:12:46,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:12:46,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:12:46,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:46,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:12:46,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:46,406 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 15 treesize of output 11 [2022-04-06 20:12:48,486 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:12:48,491 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 23 treesize of output 10 [2022-04-06 20:12:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 153 proven. 127 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 20:12:48,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:48,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050639027] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:48,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:12:48,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 54 [2022-04-06 20:12:48,909 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:48,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2096749880] [2022-04-06 20:12:48,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2096749880] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:48,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:48,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:12:48,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164419174] [2022-04-06 20:12:48,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:48,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:12:48,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:12:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2777, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:12:48,910 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 20:12:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:50,046 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2022-04-06 20:12:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:12:50,047 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 106 [2022-04-06 20:12:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:50,048 INFO L225 Difference]: With dead ends: 122 [2022-04-06 20:12:50,048 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 20:12:50,050 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 88 SyntacticMatches, 18 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=511, Invalid=6131, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:12:50,050 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:50,051 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 146 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:12:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 20:12:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-04-06 20:12:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.021978021978022) internal successors, (93), 92 states have internal predecessors, (93), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 20:12:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-04-06 20:12:50,078 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 106 [2022-04-06 20:12:50,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:50,078 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-04-06 20:12:50,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 20:12:50,078 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-04-06 20:12:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 20:12:50,079 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:50,079 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:50,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:12:50,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:50,280 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:50,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059454, now seen corresponding path program 37 times [2022-04-06 20:12:50,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:50,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [563060853] [2022-04-06 20:12:50,281 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:12:50,281 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:50,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059454, now seen corresponding path program 38 times [2022-04-06 20:12:50,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:50,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256816534] [2022-04-06 20:12:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:50,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 20:12:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 20:12:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 20:12:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 20:12:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 20:12:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 20:12:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 20:12:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 20:12:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 20:12:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 20:12:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 183 proven. 137 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 20:12:50,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:50,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256816534] [2022-04-06 20:12:50,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256816534] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:50,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007262500] [2022-04-06 20:12:50,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:12:50,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:50,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:50,512 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:12:50,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:12:50,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:12:50,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:12:50,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 220 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 20:12:51,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 220 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 20:12:51,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007262500] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:51,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:51,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 39 [2022-04-06 20:12:51,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:51,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [563060853] [2022-04-06 20:12:51,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [563060853] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:51,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:51,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:12:51,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472249879] [2022-04-06 20:12:51,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:51,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:12:51,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:51,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:12:51,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:12:51,229 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 20:12:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:51,646 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2022-04-06 20:12:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:12:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 114 [2022-04-06 20:12:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:51,648 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:12:51,648 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 20:12:51,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=682, Invalid=3100, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:12:51,649 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:51,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 55 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:12:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 20:12:51,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-04-06 20:12:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.021505376344086) internal successors, (95), 94 states have internal predecessors, (95), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 20:12:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-04-06 20:12:51,663 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2022-04-06 20:12:51,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:51,663 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-04-06 20:12:51,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 20:12:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-04-06 20:12:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 20:12:51,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:51,664 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:51,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:12:51,871 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,SelfDestructingSolverStorable20 [2022-04-06 20:12:51,872 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:51,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:51,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1880118428, now seen corresponding path program 39 times [2022-04-06 20:12:51,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:51,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [215663690] [2022-04-06 20:12:51,873 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:12:51,873 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1880118428, now seen corresponding path program 40 times [2022-04-06 20:12:51,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:51,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143794197] [2022-04-06 20:12:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:51,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 20:12:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 20:12:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 20:12:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 20:12:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 20:12:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 20:12:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 20:12:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 20:12:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 20:12:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 20:12:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 20 proven. 321 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 20:12:52,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:52,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143794197] [2022-04-06 20:12:52,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143794197] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:52,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656183394] [2022-04-06 20:12:52,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:12:52,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:52,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:52,305 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:12:52,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:12:52,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:12:52,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:12:52,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:52,724 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 15 treesize of output 11 [2022-04-06 20:12:55,218 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:12:55,219 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 23 treesize of output 10 [2022-04-06 20:12:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 190 proven. 151 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 20:12:55,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:55,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656183394] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:55,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:12:55,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 58 [2022-04-06 20:12:55,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:55,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [215663690] [2022-04-06 20:12:55,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [215663690] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:55,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:55,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:12:55,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116752958] [2022-04-06 20:12:55,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:55,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:12:55,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:55,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:12:55,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:12:55,427 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 20:12:56,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:56,778 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2022-04-06 20:12:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:12:56,780 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 116 [2022-04-06 20:12:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:56,780 INFO L225 Difference]: With dead ends: 132 [2022-04-06 20:12:56,780 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 20:12:56,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 96 SyntacticMatches, 20 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=575, Invalid=7081, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:12:56,781 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 80 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:56,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 157 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:12:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 20:12:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-04-06 20:12:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 99 states have (on average 1.02020202020202) internal successors, (101), 100 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 20:12:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-04-06 20:12:56,799 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 116 [2022-04-06 20:12:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:56,799 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-04-06 20:12:56,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 20:12:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-04-06 20:12:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 20:12:56,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:56,800 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:56,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:12:57,000 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,SelfDestructingSolverStorable21 [2022-04-06 20:12:57,001 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:57,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1566810506, now seen corresponding path program 41 times [2022-04-06 20:12:57,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:57,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1006388544] [2022-04-06 20:12:57,002 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:12:57,002 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1566810506, now seen corresponding path program 42 times [2022-04-06 20:12:57,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:57,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976276143] [2022-04-06 20:12:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:57,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 20:12:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 20:12:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 20:12:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 20:12:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 20:12:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 20:12:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 20:12:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 20:12:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 20:12:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 20:12:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 20:12:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 223 proven. 162 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 20:12:57,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976276143] [2022-04-06 20:12:57,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976276143] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953944879] [2022-04-06 20:12:57,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:12:57,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:57,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:57,278 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:12:57,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:12:57,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 20:12:57,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:57,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:12:57,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 264 proven. 121 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 20:12:57,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 264 proven. 121 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 20:12:58,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953944879] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:58,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:58,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 42 [2022-04-06 20:12:58,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:58,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1006388544] [2022-04-06 20:12:58,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1006388544] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:58,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:58,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:12:58,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129926] [2022-04-06 20:12:58,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:58,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:12:58,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:58,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:12:58,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:12:58,114 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 20:12:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:58,775 INFO L93 Difference]: Finished difference Result 186 states and 199 transitions. [2022-04-06 20:12:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:12:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 124 [2022-04-06 20:12:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:58,776 INFO L225 Difference]: With dead ends: 186 [2022-04-06 20:12:58,776 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 20:12:58,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=790, Invalid=3632, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:12:58,778 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:58,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 92 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:12:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 20:12:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-04-06 20:12:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 20:12:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-04-06 20:12:58,800 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2022-04-06 20:12:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:58,800 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-04-06 20:12:58,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 20:12:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-04-06 20:12:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-04-06 20:12:58,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:58,801 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:58,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 20:12:59,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:59,005 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:59,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1844578604, now seen corresponding path program 43 times [2022-04-06 20:12:59,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:59,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [689015674] [2022-04-06 20:12:59,006 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:12:59,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:59,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1844578604, now seen corresponding path program 44 times [2022-04-06 20:12:59,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:59,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685212215] [2022-04-06 20:12:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:59,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 20:12:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 20:12:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 20:12:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 20:12:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 20:12:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 20:12:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 20:12:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 20:12:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 20:12:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 20:12:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 20:12:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 22 proven. 386 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 20:12:59,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:59,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685212215] [2022-04-06 20:12:59,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685212215] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:59,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064929354] [2022-04-06 20:12:59,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:12:59,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:59,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:59,581 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:12:59,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:12:59,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:12:59,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:59,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:12:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:59,776 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 15 treesize of output 11 [2022-04-06 20:16:34,671 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 19 treesize of output 7 [2022-04-06 20:16:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 20:16:34,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:16:36,930 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 14 [2022-04-06 20:16:36,932 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 28 treesize of output 24 [2022-04-06 20:16:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 22 proven. 386 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 20:16:37,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064929354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:16:37,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:16:37,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 30] total 47 [2022-04-06 20:16:37,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:16:37,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [689015674] [2022-04-06 20:16:37,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [689015674] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:16:37,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:16:37,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:16:37,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170226612] [2022-04-06 20:16:37,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:16:37,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:16:37,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:37,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:16:37,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2017, Unknown=12, NotChecked=0, Total=2162 [2022-04-06 20:16:37,016 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 20:16:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:16:38,408 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2022-04-06 20:16:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:16:38,409 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 126 [2022-04-06 20:16:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:16:38,409 INFO L225 Difference]: With dead ends: 142 [2022-04-06 20:16:38,410 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:16:38,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 235 SyntacticMatches, 26 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 217.6s TimeCoverageRelationStatistics Valid=304, Invalid=5536, Unknown=12, NotChecked=0, Total=5852 [2022-04-06 20:16:38,411 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 85 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:16:38,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 168 Invalid, 2768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:16:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:16:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2022-04-06 20:16:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 108 states have internal predecessors, (109), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 20:16:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-04-06 20:16:38,427 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 126 [2022-04-06 20:16:38,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:16:38,427 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-04-06 20:16:38,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 20:16:38,427 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-04-06 20:16:38,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 20:16:38,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:16:38,428 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:16:38,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 20:16:38,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:38,628 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:16:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:16:38,629 INFO L85 PathProgramCache]: Analyzing trace with hash 886065326, now seen corresponding path program 45 times [2022-04-06 20:16:38,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:38,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [31889082] [2022-04-06 20:16:38,630 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:16:38,630 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:16:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash 886065326, now seen corresponding path program 46 times [2022-04-06 20:16:38,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:16:38,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138375951] [2022-04-06 20:16:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:16:38,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:16:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:16:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 20:16:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 20:16:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 20:16:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 20:16:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 20:16:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 20:16:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 20:16:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 20:16:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 20:16:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 20:16:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 20:16:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-04-06 20:16:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 267 proven. 189 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 20:16:38,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:16:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138375951] [2022-04-06 20:16:38,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138375951] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:16:38,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303785082] [2022-04-06 20:16:38,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:16:38,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:38,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:16:38,947 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:16:38,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:16:39,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:16:39,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:16:39,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:16:39,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:16:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 312 proven. 144 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 20:16:39,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:16:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 312 proven. 144 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 20:16:40,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303785082] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:16:40,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:16:40,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 45 [2022-04-06 20:16:40,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:16:40,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [31889082] [2022-04-06 20:16:40,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [31889082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:16:40,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:16:40,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:16:40,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871439114] [2022-04-06 20:16:40,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:16:40,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:16:40,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:40,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:16:40,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:16:40,123 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 20:16:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:16:40,741 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2022-04-06 20:16:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:16:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 134 [2022-04-06 20:16:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:16:40,742 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:16:40,742 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:16:40,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=906, Invalid=4206, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:16:40,744 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:16:40,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 89 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:16:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:16:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-04-06 20:16:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 109 states have (on average 1.018348623853211) internal successors, (111), 110 states have internal predecessors, (111), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 20:16:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-04-06 20:16:40,773 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2022-04-06 20:16:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:16:40,773 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-04-06 20:16:40,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 20:16:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-04-06 20:16:40,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-04-06 20:16:40,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:16:40,776 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:16:40,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 20:16:40,978 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,SelfDestructingSolverStorable24 [2022-04-06 20:16:40,978 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:16:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:16:40,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1055030388, now seen corresponding path program 47 times [2022-04-06 20:16:40,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:40,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1253623001] [2022-04-06 20:16:40,979 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:16:40,979 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:16:40,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1055030388, now seen corresponding path program 48 times [2022-04-06 20:16:40,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:16:40,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320727523] [2022-04-06 20:16:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:16:40,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:16:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:16:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 20:16:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 20:16:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 20:16:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 20:16:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 20:16:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 20:16:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 20:16:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 20:16:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 20:16:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-06 20:16:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-04-06 20:16:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-04-06 20:16:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 24 proven. 457 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 20:16:41,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:16:41,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320727523] [2022-04-06 20:16:41,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320727523] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:16:41,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748867851] [2022-04-06 20:16:41,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:16:41,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:41,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:16:41,664 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:16:41,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:16:41,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-04-06 20:16:41,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:16:41,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:16:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:16:42,274 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 15 treesize of output 11 [2022-04-06 20:16:47,130 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:16:47,131 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 23 treesize of output 10 [2022-04-06 20:16:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 276 proven. 205 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 20:16:47,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:16:47,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748867851] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:16:47,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:16:47,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36] total 67 [2022-04-06 20:16:47,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:16:47,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1253623001] [2022-04-06 20:16:47,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1253623001] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:16:47,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:16:47,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:16:47,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581813932] [2022-04-06 20:16:47,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:16:47,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:16:47,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:16:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=4224, Unknown=1, NotChecked=0, Total=4692 [2022-04-06 20:16:47,335 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 20:16:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:16:48,937 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2022-04-06 20:16:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:16:48,937 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 136 [2022-04-06 20:16:48,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:16:48,938 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:16:48,938 INFO L226 Difference]: Without dead ends: 150 [2022-04-06 20:16:48,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 112 SyntacticMatches, 23 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3339 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=744, Invalid=9355, Unknown=1, NotChecked=0, Total=10100 [2022-04-06 20:16:48,939 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 88 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:16:48,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 151 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2808 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:16:48,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-04-06 20:16:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-04-06 20:16:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 115 states have (on average 1.017391304347826) internal successors, (117), 116 states have internal predecessors, (117), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 20:16:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-04-06 20:16:48,958 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 136 [2022-04-06 20:16:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:16:48,958 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-04-06 20:16:48,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 20:16:48,959 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-04-06 20:16:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-04-06 20:16:48,959 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:16:48,959 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:16:48,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 20:16:49,175 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,SelfDestructingSolverStorable25 [2022-04-06 20:16:49,176 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:16:49,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:16:49,176 INFO L85 PathProgramCache]: Analyzing trace with hash -490496666, now seen corresponding path program 49 times [2022-04-06 20:16:49,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:49,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638860160] [2022-04-06 20:16:49,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:16:49,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:16:49,177 INFO L85 PathProgramCache]: Analyzing trace with hash -490496666, now seen corresponding path program 50 times [2022-04-06 20:16:49,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:16:49,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471505804] [2022-04-06 20:16:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:16:49,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:16:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:16:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 20:16:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 20:16:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 20:16:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 20:16:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 20:16:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 20:16:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 20:16:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 20:16:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 20:16:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-06 20:16:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-04-06 20:16:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-04-06 20:16:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-04-06 20:16:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 315 proven. 218 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 20:16:49,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:16:49,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471505804] [2022-04-06 20:16:49,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471505804] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:16:49,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025338214] [2022-04-06 20:16:49,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:16:49,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:49,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:16:49,516 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:16:49,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:16:49,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:16:49,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:16:49,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:16:49,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:16:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 364 proven. 169 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 20:16:50,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:16:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 364 proven. 169 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 20:16:50,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025338214] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:16:50,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:16:50,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 48 [2022-04-06 20:16:50,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:16:50,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638860160] [2022-04-06 20:16:50,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638860160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:16:50,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:16:50,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:16:50,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808345621] [2022-04-06 20:16:50,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:16:50,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:16:50,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:50,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:16:50,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1754, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:16:50,369 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 20:16:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:16:50,947 INFO L93 Difference]: Finished difference Result 214 states and 229 transitions. [2022-04-06 20:16:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:16:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 144 [2022-04-06 20:16:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:16:50,949 INFO L225 Difference]: With dead ends: 214 [2022-04-06 20:16:50,949 INFO L226 Difference]: Without dead ends: 150 [2022-04-06 20:16:50,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1030, Invalid=4822, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:16:50,950 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:16:50,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 71 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:16:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-04-06 20:16:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-04-06 20:16:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.017094017094017) internal successors, (119), 118 states have internal predecessors, (119), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 20:16:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-04-06 20:16:50,976 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2022-04-06 20:16:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:16:50,976 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-04-06 20:16:50,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 20:16:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-04-06 20:16:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 20:16:50,976 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:16:50,977 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:16:50,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 20:16:51,186 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,SelfDestructingSolverStorable26 [2022-04-06 20:16:51,187 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:16:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:16:51,187 INFO L85 PathProgramCache]: Analyzing trace with hash 564353732, now seen corresponding path program 51 times [2022-04-06 20:16:51,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:51,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1188888168] [2022-04-06 20:16:51,188 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:16:51,188 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:16:51,188 INFO L85 PathProgramCache]: Analyzing trace with hash 564353732, now seen corresponding path program 52 times [2022-04-06 20:16:51,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:16:51,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857230185] [2022-04-06 20:16:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:16:51,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:16:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:16:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 20:16:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 20:16:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 20:16:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 20:16:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 20:16:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 20:16:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 20:16:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 20:16:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 20:16:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 20:16:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 20:16:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 20:16:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 20:16:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 26 proven. 534 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 20:16:51,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:16:51,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857230185] [2022-04-06 20:16:51,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857230185] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:16:51,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504865445] [2022-04-06 20:16:51,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:16:51,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:51,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:16:51,748 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:16:51,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:16:52,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:16:52,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:16:52,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:16:52,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:16:52,518 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 15 treesize of output 11 [2022-04-06 20:16:56,039 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:16:56,039 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 23 treesize of output 10 [2022-04-06 20:16:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 325 proven. 235 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 20:16:56,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:16:56,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504865445] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:16:56,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:16:56,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 70 [2022-04-06 20:16:56,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:16:56,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1188888168] [2022-04-06 20:16:56,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1188888168] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:16:56,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:16:56,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:16:56,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774203025] [2022-04-06 20:16:56,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:16:56,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:16:56,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:56,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:16:56,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4623, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:16:56,277 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 20:16:58,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:16:58,209 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2022-04-06 20:16:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:16:58,209 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 146 [2022-04-06 20:16:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:16:58,210 INFO L225 Difference]: With dead ends: 162 [2022-04-06 20:16:58,210 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 20:16:58,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 120 SyntacticMatches, 26 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=791, Invalid=10339, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:16:58,211 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 95 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 3466 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:16:58,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 186 Invalid, 3560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3466 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:16:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 20:16:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2022-04-06 20:16:58,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 123 states have (on average 1.016260162601626) internal successors, (125), 124 states have internal predecessors, (125), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 20:16:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-04-06 20:16:58,236 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 146 [2022-04-06 20:16:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:16:58,236 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-04-06 20:16:58,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 20:16:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-04-06 20:16:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-04-06 20:16:58,237 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:16:58,237 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:16:58,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:16:58,451 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,SelfDestructingSolverStorable27 [2022-04-06 20:16:58,451 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:16:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:16:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash -696599394, now seen corresponding path program 53 times [2022-04-06 20:16:58,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:58,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1614102885] [2022-04-06 20:16:58,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:16:58,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:16:58,453 INFO L85 PathProgramCache]: Analyzing trace with hash -696599394, now seen corresponding path program 54 times [2022-04-06 20:16:58,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:16:58,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462663440] [2022-04-06 20:16:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:16:58,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:16:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:16:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 20:16:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 20:16:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 20:16:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 20:16:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 20:16:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 20:16:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 20:16:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 20:16:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 20:16:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 20:16:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 20:16:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 20:16:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 20:16:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 20:16:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:16:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 367 proven. 249 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 20:16:58,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:16:58,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462663440] [2022-04-06 20:16:58,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462663440] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:16:58,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912501679] [2022-04-06 20:16:58,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:16:58,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:58,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:16:58,799 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:16:58,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:16:59,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-04-06 20:16:59,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:16:59,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:16:59,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:16:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 420 proven. 196 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 20:16:59,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:16:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 420 proven. 196 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 20:16:59,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912501679] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:16:59,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:16:59,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 51 [2022-04-06 20:16:59,947 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:16:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1614102885] [2022-04-06 20:16:59,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1614102885] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:16:59,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:16:59,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:16:59,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805646715] [2022-04-06 20:16:59,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:16:59,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:16:59,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:16:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=1983, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:16:59,948 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 20:17:00,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:17:00,608 INFO L93 Difference]: Finished difference Result 228 states and 244 transitions. [2022-04-06 20:17:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:17:00,609 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 154 [2022-04-06 20:17:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:17:00,610 INFO L225 Difference]: With dead ends: 228 [2022-04-06 20:17:00,610 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 20:17:00,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1162, Invalid=5480, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:17:00,611 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:17:00,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 88 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:17:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 20:17:00,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-04-06 20:17:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.016) internal successors, (127), 126 states have internal predecessors, (127), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 20:17:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-04-06 20:17:00,633 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2022-04-06 20:17:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:17:00,633 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-04-06 20:17:00,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 20:17:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-04-06 20:17:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-04-06 20:17:00,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:17:00,634 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:17:00,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 20:17:00,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:17:00,852 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:17:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:17:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash -829694852, now seen corresponding path program 55 times [2022-04-06 20:17:00,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:00,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408110156] [2022-04-06 20:17:00,853 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:17:00,853 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:17:00,853 INFO L85 PathProgramCache]: Analyzing trace with hash -829694852, now seen corresponding path program 56 times [2022-04-06 20:17:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:17:00,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30642479] [2022-04-06 20:17:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:17:00,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:17:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:17:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 20:17:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 20:17:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 20:17:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 20:17:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 20:17:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 20:17:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 20:17:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 20:17:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 20:17:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 20:17:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 20:17:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 20:17:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-04-06 20:17:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-04-06 20:17:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:17:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 28 proven. 617 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 20:17:01,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:17:01,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30642479] [2022-04-06 20:17:01,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30642479] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:17:01,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694753356] [2022-04-06 20:17:01,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:17:01,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:01,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:17:01,440 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:17:01,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:17:01,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:17:01,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:17:01,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:17:01,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:17:01,657 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 15 treesize of output 11 [2022-04-06 20:22:46,048 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 19 treesize of output 7 [2022-04-06 20:22:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 20:22:46,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:22:48,361 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 14 [2022-04-06 20:22:48,363 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 28 treesize of output 24 [2022-04-06 20:22:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 28 proven. 617 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 20:22:48,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694753356] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:22:48,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:22:48,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 36] total 56 [2022-04-06 20:22:48,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:22:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408110156] [2022-04-06 20:22:48,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408110156] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:22:48,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:22:48,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:22:48,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11540155] [2022-04-06 20:22:48,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:22:48,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:22:48,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:22:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:22:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2905, Unknown=15, NotChecked=0, Total=3080 [2022-04-06 20:22:48,486 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 20:22:50,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:22:50,482 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2022-04-06 20:22:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:22:50,483 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 156 [2022-04-06 20:22:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:22:50,483 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:22:50,483 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 20:22:50,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 292 SyntacticMatches, 32 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 347.3s TimeCoverageRelationStatistics Valid=364, Invalid=7993, Unknown=15, NotChecked=0, Total=8372 [2022-04-06 20:22:50,484 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 100 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 4040 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 4040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:22:50,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 201 Invalid, 4140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 4040 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:22:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 20:22:50,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2022-04-06 20:22:50,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 131 states have (on average 1.015267175572519) internal successors, (133), 132 states have internal predecessors, (133), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 20:22:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2022-04-06 20:22:50,509 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 156 [2022-04-06 20:22:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:22:50,509 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2022-04-06 20:22:50,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 20:22:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2022-04-06 20:22:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-04-06 20:22:50,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:22:50,511 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:22:50,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:22:50,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:22:50,727 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:22:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:22:50,728 INFO L85 PathProgramCache]: Analyzing trace with hash 679609942, now seen corresponding path program 57 times [2022-04-06 20:22:50,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:22:50,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [656818714] [2022-04-06 20:22:50,729 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:22:50,729 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:22:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash 679609942, now seen corresponding path program 58 times [2022-04-06 20:22:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:22:50,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968951199] [2022-04-06 20:22:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:22:50,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:22:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:22:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 20:22:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 20:22:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 20:22:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 20:22:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 20:22:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 20:22:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 20:22:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 20:22:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 20:22:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 20:22:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 20:22:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-04-06 20:22:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-04-06 20:22:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-04-06 20:22:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-04-06 20:22:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 423 proven. 282 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 20:22:51,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:22:51,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968951199] [2022-04-06 20:22:51,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968951199] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:22:51,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299264484] [2022-04-06 20:22:51,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:22:51,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:22:51,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:22:51,125 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:22:51,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:22:51,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:22:51,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:22:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:22:51,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:22:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 480 proven. 225 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 20:22:52,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:22:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 480 proven. 225 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 20:22:52,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299264484] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:22:52,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:22:52,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2022-04-06 20:22:52,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:22:52,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [656818714] [2022-04-06 20:22:52,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [656818714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:22:52,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:22:52,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:22:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652387585] [2022-04-06 20:22:52,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:22:52,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:22:52,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:22:52,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:22:52,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=2226, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:22:52,408 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 20:22:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:22:53,231 INFO L93 Difference]: Finished difference Result 242 states and 259 transitions. [2022-04-06 20:22:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:22:53,232 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 164 [2022-04-06 20:22:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:22:53,233 INFO L225 Difference]: With dead ends: 242 [2022-04-06 20:22:53,233 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 20:22:53,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1302, Invalid=6180, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:22:53,235 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:22:53,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 115 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:22:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 20:22:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-04-06 20:22:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 20:22:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-04-06 20:22:53,259 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-04-06 20:22:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:22:53,259 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-04-06 20:22:53,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 20:22:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-04-06 20:22:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-04-06 20:22:53,260 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:22:53,260 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:22:53,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 20:22:53,475 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,SelfDestructingSolverStorable30 [2022-04-06 20:22:53,475 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:22:53,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:22:53,476 INFO L85 PathProgramCache]: Analyzing trace with hash -817141580, now seen corresponding path program 59 times [2022-04-06 20:22:53,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:22:53,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1812277397] [2022-04-06 20:22:53,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:22:53,477 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:22:53,477 INFO L85 PathProgramCache]: Analyzing trace with hash -817141580, now seen corresponding path program 60 times [2022-04-06 20:22:53,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:22:53,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937510884] [2022-04-06 20:22:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:22:53,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:22:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:22:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 20:22:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 20:22:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 20:22:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 20:22:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 20:22:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 20:22:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 20:22:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 20:22:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 20:22:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 20:22:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-04-06 20:22:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-04-06 20:22:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-04-06 20:22:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-04-06 20:22:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-04-06 20:22:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:22:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 30 proven. 706 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 20:22:54,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:22:54,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937510884] [2022-04-06 20:22:54,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937510884] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:22:54,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85245305] [2022-04-06 20:22:54,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:22:54,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:22:54,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:22:54,258 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:22:54,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:22:54,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-04-06 20:22:54,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:22:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:22:54,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:22:55,109 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 15 treesize of output 11 [2022-04-06 20:22:59,565 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:22:59,565 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 23 treesize of output 10 [2022-04-06 20:22:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 435 proven. 301 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 20:22:59,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:22:59,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85245305] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:22:59,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:22:59,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41] total 78 [2022-04-06 20:22:59,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:22:59,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1812277397] [2022-04-06 20:22:59,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1812277397] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:22:59,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:22:59,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:22:59,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600315616] [2022-04-06 20:22:59,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:22:59,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:22:59,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:22:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:22:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=5720, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:22:59,830 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 20:23:02,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:23:02,257 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2022-04-06 20:23:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:23:02,257 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 166 [2022-04-06 20:23:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:23:02,258 INFO L225 Difference]: With dead ends: 182 [2022-04-06 20:23:02,258 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 20:23:02,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 136 SyntacticMatches, 30 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=955, Invalid=12851, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:23:02,259 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 105 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 4404 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 4404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:23:02,260 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 208 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 4404 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:23:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 20:23:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2022-04-06 20:23:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 139 states have (on average 1.014388489208633) internal successors, (141), 140 states have internal predecessors, (141), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 20:23:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-04-06 20:23:02,290 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 166 [2022-04-06 20:23:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:23:02,291 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-04-06 20:23:02,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 20:23:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-04-06 20:23:02,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-04-06 20:23:02,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:23:02,292 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:23:02,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 20:23:02,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:02,503 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:23:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:23:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash -705832306, now seen corresponding path program 61 times [2022-04-06 20:23:02,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:02,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [132450692] [2022-04-06 20:23:02,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:23:02,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:23:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash -705832306, now seen corresponding path program 62 times [2022-04-06 20:23:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:23:02,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448075070] [2022-04-06 20:23:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:23:02,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:23:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:23:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 20:23:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 20:23:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 20:23:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 20:23:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 20:23:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 20:23:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 20:23:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 20:23:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 20:23:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 20:23:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-04-06 20:23:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-04-06 20:23:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-04-06 20:23:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-04-06 20:23:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-04-06 20:23:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-04-06 20:23:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 483 proven. 317 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 20:23:02,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:23:02,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448075070] [2022-04-06 20:23:02,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448075070] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:02,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115576720] [2022-04-06 20:23:02,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:23:02,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:02,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:23:02,943 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:23:02,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:23:03,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:23:03,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:23:03,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:23:03,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:23:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 544 proven. 256 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 20:23:03,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:23:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 544 proven. 256 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 20:23:04,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115576720] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:23:04,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:23:04,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 57 [2022-04-06 20:23:04,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:23:04,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [132450692] [2022-04-06 20:23:04,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [132450692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:23:04,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:23:04,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:23:04,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133538093] [2022-04-06 20:23:04,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:23:04,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:23:04,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:23:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=2483, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:23:04,016 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 20:23:04,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:23:04,842 INFO L93 Difference]: Finished difference Result 256 states and 274 transitions. [2022-04-06 20:23:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:23:04,842 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 174 [2022-04-06 20:23:04,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:23:04,844 INFO L225 Difference]: With dead ends: 256 [2022-04-06 20:23:04,844 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 20:23:04,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1450, Invalid=6922, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:23:04,845 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:23:04,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:23:04,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 20:23:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-04-06 20:23:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 142 states have internal predecessors, (143), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 20:23:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2022-04-06 20:23:04,872 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2022-04-06 20:23:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:23:04,872 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2022-04-06 20:23:04,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 20:23:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2022-04-06 20:23:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 20:23:04,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:23:04,873 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:23:04,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 20:23:05,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:05,075 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:23:05,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:23:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1914806420, now seen corresponding path program 63 times [2022-04-06 20:23:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2027005360] [2022-04-06 20:23:05,077 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:23:05,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:23:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1914806420, now seen corresponding path program 64 times [2022-04-06 20:23:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:23:05,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8559296] [2022-04-06 20:23:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:23:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:23:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:23:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 20:23:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 20:23:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 20:23:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 20:23:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 20:23:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 20:23:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 20:23:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 20:23:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-06 20:23:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-04-06 20:23:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-04-06 20:23:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-04-06 20:23:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-04-06 20:23:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-04-06 20:23:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-04-06 20:23:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-04-06 20:23:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 32 proven. 801 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 20:23:05,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:23:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8559296] [2022-04-06 20:23:05,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8559296] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713325981] [2022-04-06 20:23:05,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:23:05,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:05,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:23:05,847 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:23:05,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:23:06,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:23:06,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:23:06,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:23:06,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:23:06,917 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 15 treesize of output 11 [2022-04-06 20:23:12,215 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-04-06 20:23:12,215 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 23 treesize of output 10 [2022-04-06 20:23:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 496 proven. 337 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 20:23:12,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:23:12,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713325981] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:12,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:23:12,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43] total 82 [2022-04-06 20:23:12,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:23:12,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2027005360] [2022-04-06 20:23:12,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2027005360] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:23:12,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:23:12,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:23:12,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162648997] [2022-04-06 20:23:12,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:23:12,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:23:12,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:23:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=6312, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:23:12,481 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 20:23:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:23:15,136 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2022-04-06 20:23:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:23:15,137 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 176 [2022-04-06 20:23:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:23:15,138 INFO L225 Difference]: With dead ends: 192 [2022-04-06 20:23:15,138 INFO L226 Difference]: Without dead ends: 190 [2022-04-06 20:23:15,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 144 SyntacticMatches, 32 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3414 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1043, Invalid=14209, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:23:15,139 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 110 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 4976 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:23:15,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 223 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4976 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:23:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-04-06 20:23:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2022-04-06 20:23:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 148 states have internal predecessors, (149), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 20:23:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-04-06 20:23:15,166 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 176 [2022-04-06 20:23:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:23:15,166 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-04-06 20:23:15,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 20:23:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-04-06 20:23:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-04-06 20:23:15,167 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:23:15,167 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:23:15,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:23:15,382 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,SelfDestructingSolverStorable33 [2022-04-06 20:23:15,383 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:23:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:23:15,383 INFO L85 PathProgramCache]: Analyzing trace with hash 911907142, now seen corresponding path program 65 times [2022-04-06 20:23:15,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:15,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1189030191] [2022-04-06 20:23:15,384 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:23:15,384 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:23:15,384 INFO L85 PathProgramCache]: Analyzing trace with hash 911907142, now seen corresponding path program 66 times [2022-04-06 20:23:15,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:23:15,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472544910] [2022-04-06 20:23:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:23:15,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:23:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:23:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 20:23:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 20:23:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 20:23:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 20:23:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 20:23:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 20:23:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 20:23:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 20:23:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-06 20:23:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-04-06 20:23:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-04-06 20:23:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-04-06 20:23:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-04-06 20:23:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-04-06 20:23:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-04-06 20:23:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-04-06 20:23:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-04-06 20:23:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 547 proven. 354 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 20:23:15,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:23:15,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472544910] [2022-04-06 20:23:15,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472544910] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:15,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911115010] [2022-04-06 20:23:15,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:23:15,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:15,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:23:15,903 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:23:15,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:23:16,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-04-06 20:23:16,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:23:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:23:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:23:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 612 proven. 289 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 20:23:17,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:23:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 612 proven. 289 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 20:23:17,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911115010] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:23:17,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:23:17,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 60 [2022-04-06 20:23:17,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:23:17,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1189030191] [2022-04-06 20:23:17,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1189030191] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:23:17,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:23:17,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:23:17,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929391563] [2022-04-06 20:23:17,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:23:17,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:23:17,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:23:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=2754, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:23:17,788 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 20:23:18,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:23:18,603 INFO L93 Difference]: Finished difference Result 270 states and 289 transitions. [2022-04-06 20:23:18,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:23:18,604 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 184 [2022-04-06 20:23:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:23:18,605 INFO L225 Difference]: With dead ends: 270 [2022-04-06 20:23:18,605 INFO L226 Difference]: Without dead ends: 190 [2022-04-06 20:23:18,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 383 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1606, Invalid=7706, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:23:18,606 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:23:18,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 94 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:23:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-04-06 20:23:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-04-06 20:23:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 150 states have internal predecessors, (151), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 20:23:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-04-06 20:23:18,635 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 184 [2022-04-06 20:23:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:23:18,635 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-04-06 20:23:18,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 20:23:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-04-06 20:23:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-04-06 20:23:18,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:23:18,636 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:23:18,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 20:23:18,847 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,SelfDestructingSolverStorable34 [2022-04-06 20:23:18,847 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:23:18,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:23:18,848 INFO L85 PathProgramCache]: Analyzing trace with hash -859234140, now seen corresponding path program 67 times [2022-04-06 20:23:18,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:23:18,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1715647156] [2022-04-06 20:23:18,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 20:23:18,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:23:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash -859234140, now seen corresponding path program 68 times [2022-04-06 20:23:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:23:18,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943373401] [2022-04-06 20:23:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:23:18,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:23:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:23:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 20:23:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 20:23:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 20:23:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 20:23:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 20:23:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 20:23:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 20:23:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 20:23:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 20:23:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 20:23:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-04-06 20:23:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-04-06 20:23:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-04-06 20:23:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-04-06 20:23:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-04-06 20:23:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-04-06 20:23:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-04-06 20:23:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:23:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 34 proven. 902 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 20:23:19,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:23:19,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943373401] [2022-04-06 20:23:19,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943373401] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:23:19,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162956024] [2022-04-06 20:23:19,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:23:19,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:23:19,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:23:19,606 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:23:19,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:23:19,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:23:19,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:23:19,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:23:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:23:19,988 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 15 treesize of output 11