/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:24:54,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:24:54,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:24:54,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:24:54,536 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 20:24:54,543 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:24:54,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:24:54,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:24:54,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:24:54,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:24:54,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:24:54,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:24:54,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:24:54,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:24:54,545 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:24:54,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:24:54,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:24:54,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:24:54,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:24:54,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:24:54,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:24:54,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:24:54,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:24:54,546 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:24:54,546 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:24:54,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:24:54,546 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:24:54,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:24:54,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:24:54,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:24:54,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:24:54,742 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:24:54,743 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:24:54,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2022-04-06 20:24:54,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc69b5c08/37c6bcfe6a734a5f88cf23581433e21e/FLAG30285c506 [2022-04-06 20:24:55,129 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:24:55,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2022-04-06 20:24:55,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc69b5c08/37c6bcfe6a734a5f88cf23581433e21e/FLAG30285c506 [2022-04-06 20:24:55,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc69b5c08/37c6bcfe6a734a5f88cf23581433e21e [2022-04-06 20:24:55,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:24:55,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:24:55,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:24:55,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:24:55,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:24:55,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:24:55" (1/1) ... [2022-04-06 20:24:55,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@353ba128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55, skipping insertion in model container [2022-04-06 20:24:55,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:24:55" (1/1) ... [2022-04-06 20:24:55,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:24:55,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:24:55,285 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c[313,326] [2022-04-06 20:24:55,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:24:55,300 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:24:55,307 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c[313,326] [2022-04-06 20:24:55,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:24:55,316 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:24:55,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55 WrapperNode [2022-04-06 20:24:55,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:24:55,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:24:55,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:24:55,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:24:55,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55" (1/1) ... [2022-04-06 20:24:55,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55" (1/1) ... [2022-04-06 20:24:55,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55" (1/1) ... [2022-04-06 20:24:55,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55" (1/1) ... [2022-04-06 20:24:55,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55" (1/1) ... [2022-04-06 20:24:55,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55" (1/1) ... [2022-04-06 20:24:55,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55" (1/1) ... [2022-04-06 20:24:55,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:24:55,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:24:55,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:24:55,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:24:55,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55" (1/1) ... [2022-04-06 20:24:55,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:24:55,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:55,366 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 20:24:55,371 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 20:24:55,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:24:55,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:24:55,391 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:24:55,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:24:55,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:24:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:24:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:24:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:24:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:24:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:24:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:24:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:24:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:24:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:24:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:24:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:24:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:24:55,434 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:24:55,435 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:24:55,496 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:24:55,500 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:24:55,500 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 20:24:55,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:24:55 BoogieIcfgContainer [2022-04-06 20:24:55,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:24:55,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:24:55,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:24:55,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:24:55,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:24:55" (1/3) ... [2022-04-06 20:24:55,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f11950a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:24:55, skipping insertion in model container [2022-04-06 20:24:55,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:24:55" (2/3) ... [2022-04-06 20:24:55,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f11950a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:24:55, skipping insertion in model container [2022-04-06 20:24:55,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:24:55" (3/3) ... [2022-04-06 20:24:55,507 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2022-04-06 20:24:55,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:24:55,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:24:55,556 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:24:55,565 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 20:24:55,565 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:24:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 20:24:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:24:55,581 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:55,581 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:55,582 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:55,598 INFO L85 PathProgramCache]: Analyzing trace with hash 491760044, now seen corresponding path program 1 times [2022-04-06 20:24:55,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:55,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684356096] [2022-04-06 20:24:55,630 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:24:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 491760044, now seen corresponding path program 2 times [2022-04-06 20:24:55,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:55,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240867743] [2022-04-06 20:24:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:55,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:55,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:55,786 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 20:24:55,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:55,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240867743] [2022-04-06 20:24:55,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240867743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:55,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:55,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:24:55,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:55,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684356096] [2022-04-06 20:24:55,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684356096] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:55,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:55,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:24:55,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317199041] [2022-04-06 20:24:55,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:55,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:24:55,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:55,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:24:55,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:24:55,824 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:55,867 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-04-06 20:24:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:24:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 20:24:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:55,879 INFO L225 Difference]: With dead ends: 30 [2022-04-06 20:24:55,880 INFO L226 Difference]: Without dead ends: 13 [2022-04-06 20:24:55,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:24:55,885 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:55,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:24:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-06 20:24:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-06 20:24:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-04-06 20:24:55,924 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-04-06 20:24:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:55,925 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-04-06 20:24:55,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-04-06 20:24:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:24:55,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:55,927 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:55,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:24:55,927 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:55,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:55,928 INFO L85 PathProgramCache]: Analyzing trace with hash 482524834, now seen corresponding path program 1 times [2022-04-06 20:24:55,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:55,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1715956649] [2022-04-06 20:24:55,930 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:24:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash 482524834, now seen corresponding path program 2 times [2022-04-06 20:24:55,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:55,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291266318] [2022-04-06 20:24:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:55,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:56,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:56,051 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 20:24:56,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:56,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291266318] [2022-04-06 20:24:56,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291266318] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:56,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:56,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:24:56,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:56,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1715956649] [2022-04-06 20:24:56,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1715956649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:56,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:56,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:24:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601802021] [2022-04-06 20:24:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:56,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:24:56,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:24:56,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:24:56,054 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:56,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:56,091 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-04-06 20:24:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:24:56,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 20:24:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:56,092 INFO L225 Difference]: With dead ends: 22 [2022-04-06 20:24:56,092 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 20:24:56,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:24:56,095 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:56,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:24:56,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 20:24:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 20:24:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-04-06 20:24:56,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-04-06 20:24:56,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:56,112 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-04-06 20:24:56,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-04-06 20:24:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 20:24:56,113 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:56,113 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:56,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:24:56,113 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:56,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:56,114 INFO L85 PathProgramCache]: Analyzing trace with hash 925229631, now seen corresponding path program 1 times [2022-04-06 20:24:56,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:56,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [194848528] [2022-04-06 20:24:56,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:24:56,125 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:24:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash 925229631, now seen corresponding path program 2 times [2022-04-06 20:24:56,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:56,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862095014] [2022-04-06 20:24:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:56,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:56,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:56,213 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 20:24:56,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862095014] [2022-04-06 20:24:56,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862095014] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:24:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915946197] [2022-04-06 20:24:56,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:24:56,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:56,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:56,216 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 20:24:56,217 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 20:24:56,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:24:56,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:56,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:24:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:56,310 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 20:24:56,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:24:56,460 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 20:24:56,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915946197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:24:56,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:24:56,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 7] total 11 [2022-04-06 20:24:56,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [194848528] [2022-04-06 20:24:56,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [194848528] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:56,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:56,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:24:56,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964413702] [2022-04-06 20:24:56,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:56,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:24:56,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:56,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:24:56,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:24:56,463 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:56,509 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-04-06 20:24:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:24:56,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 20:24:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:56,510 INFO L225 Difference]: With dead ends: 24 [2022-04-06 20:24:56,511 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:24:56,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:24:56,519 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:56,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:24:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:24:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:24:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:56,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-04-06 20:24:56,528 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-04-06 20:24:56,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:56,528 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-04-06 20:24:56,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-04-06 20:24:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:24:56,529 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:56,529 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:56,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:24:56,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:56,740 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1162777244, now seen corresponding path program 3 times [2022-04-06 20:24:56,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:56,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [915886125] [2022-04-06 20:24:56,742 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:24:56,742 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:24:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1162777244, now seen corresponding path program 4 times [2022-04-06 20:24:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:56,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458997969] [2022-04-06 20:24:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:56,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:56,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:56,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458997969] [2022-04-06 20:24:56,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458997969] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:24:56,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150969497] [2022-04-06 20:24:56,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:24:56,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:56,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:56,841 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 20:24:56,842 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 20:24:56,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:24:56,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:56,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:24:56,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:56,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:24:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:56,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150969497] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:24:56,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:24:56,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:24:56,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:56,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [915886125] [2022-04-06 20:24:56,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [915886125] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:56,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:56,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:24:56,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960211089] [2022-04-06 20:24:56,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:56,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:24:56,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:56,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:24:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:24:56,992 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:57,051 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-04-06 20:24:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:24:57,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 20:24:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:57,053 INFO L225 Difference]: With dead ends: 26 [2022-04-06 20:24:57,053 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 20:24:57,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:24:57,054 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:57,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:24:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 20:24:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 20:24:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-04-06 20:24:57,058 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2022-04-06 20:24:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:57,058 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-04-06 20:24:57,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:57,058 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-04-06 20:24:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:24:57,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:57,058 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:57,077 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 20:24:57,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 20:24:57,272 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1812766649, now seen corresponding path program 5 times [2022-04-06 20:24:57,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:57,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [708045573] [2022-04-06 20:24:57,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:24:57,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:24:57,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1812766649, now seen corresponding path program 6 times [2022-04-06 20:24:57,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:57,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121151844] [2022-04-06 20:24:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:57,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:57,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:57,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:57,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121151844] [2022-04-06 20:24:57,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121151844] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:24:57,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234353378] [2022-04-06 20:24:57,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:24:57,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:57,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:57,360 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 20:24:57,361 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 20:24:57,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:24:57,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:57,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:24:57,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:24:57,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:24:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:24:57,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234353378] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:24:57,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:24:57,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 7] total 14 [2022-04-06 20:24:57,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:57,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [708045573] [2022-04-06 20:24:57,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [708045573] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:57,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:57,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:24:57,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847282768] [2022-04-06 20:24:57,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:57,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:24:57,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:24:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:24:57,616 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:57,705 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-04-06 20:24:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:24:57,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:24:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:57,706 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:24:57,706 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 20:24:57,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:24:57,707 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:57,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 34 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:24:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 20:24:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-04-06 20:24:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-04-06 20:24:57,711 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2022-04-06 20:24:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:57,711 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-04-06 20:24:57,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-04-06 20:24:57,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:24:57,712 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:57,712 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:57,728 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 20:24:57,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:57,927 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash -612640362, now seen corresponding path program 7 times [2022-04-06 20:24:57,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:57,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354918938] [2022-04-06 20:24:57,929 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:24:57,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:24:57,929 INFO L85 PathProgramCache]: Analyzing trace with hash -612640362, now seen corresponding path program 8 times [2022-04-06 20:24:57,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:57,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232889866] [2022-04-06 20:24:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:57,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:57,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:57,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:57,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232889866] [2022-04-06 20:24:57,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232889866] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:24:57,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616245468] [2022-04-06 20:24:57,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:24:57,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:57,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:58,000 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 20:24:58,001 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 20:24:58,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:24:58,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:58,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:24:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:58,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:24:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:58,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616245468] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:24:58,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:24:58,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 20:24:58,164 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:58,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354918938] [2022-04-06 20:24:58,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354918938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:58,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:58,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:24:58,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008875429] [2022-04-06 20:24:58,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:58,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:24:58,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:58,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:24:58,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:24:58,165 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:58,238 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-04-06 20:24:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:24:58,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 20:24:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:58,239 INFO L225 Difference]: With dead ends: 30 [2022-04-06 20:24:58,239 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:24:58,239 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:24:58,239 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:58,240 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:24:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:24:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 20:24:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-04-06 20:24:58,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2022-04-06 20:24:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:58,253 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-04-06 20:24:58,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-04-06 20:24:58,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:24:58,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:58,254 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:58,272 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 20:24:58,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:58,464 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash 738463795, now seen corresponding path program 9 times [2022-04-06 20:24:58,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:58,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731405994] [2022-04-06 20:24:58,465 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:24:58,466 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:24:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash 738463795, now seen corresponding path program 10 times [2022-04-06 20:24:58,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:58,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411592726] [2022-04-06 20:24:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:58,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:58,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:58,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411592726] [2022-04-06 20:24:58,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411592726] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:24:58,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640004366] [2022-04-06 20:24:58,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:24:58,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:58,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:58,541 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 20:24:58,542 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 20:24:58,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:24:58,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:58,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:24:58,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:58,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:24:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:58,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640004366] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:24:58,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:24:58,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 19 [2022-04-06 20:24:58,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:58,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731405994] [2022-04-06 20:24:58,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731405994] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:58,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:58,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:24:58,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16011099] [2022-04-06 20:24:58,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:58,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:24:58,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:58,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:24:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:24:58,854 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:58,961 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-04-06 20:24:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:24:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 20:24:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:58,962 INFO L225 Difference]: With dead ends: 32 [2022-04-06 20:24:58,962 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 20:24:58,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:24:58,963 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:58,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:24:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 20:24:58,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 20:24:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-04-06 20:24:58,966 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2022-04-06 20:24:58,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:58,967 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-04-06 20:24:58,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-04-06 20:24:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:24:58,967 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:58,967 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:58,987 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 20:24:59,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:59,176 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2069435280, now seen corresponding path program 11 times [2022-04-06 20:24:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:59,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450713896] [2022-04-06 20:24:59,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:24:59,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:24:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash 2069435280, now seen corresponding path program 12 times [2022-04-06 20:24:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:59,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637160670] [2022-04-06 20:24:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:59,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:59,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:59,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:59,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637160670] [2022-04-06 20:24:59,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637160670] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:24:59,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906625061] [2022-04-06 20:24:59,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:24:59,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:59,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:59,274 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 20:24:59,275 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 20:24:59,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:24:59,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:59,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:24:59,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:24:59,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:24:59,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906625061] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:59,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:24:59,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-04-06 20:24:59,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:59,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450713896] [2022-04-06 20:24:59,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450713896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:59,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:59,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:24:59,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773477859] [2022-04-06 20:24:59,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:59,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:24:59,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:59,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:24:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:24:59,362 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:59,372 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-04-06 20:24:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:24:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:24:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:59,374 INFO L225 Difference]: With dead ends: 32 [2022-04-06 20:24:59,374 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 20:24:59,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:24:59,375 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:59,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:24:59,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 20:24:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-06 20:24:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:59,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-06 20:24:59,379 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2022-04-06 20:24:59,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:59,379 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-06 20:24:59,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:24:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-06 20:24:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:24:59,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:59,380 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:59,387 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 20:24:59,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:59,584 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:59,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:59,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1290036459, now seen corresponding path program 1 times [2022-04-06 20:24:59,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:59,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1373861569] [2022-04-06 20:24:59,587 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:24:59,588 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:24:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1290036459, now seen corresponding path program 2 times [2022-04-06 20:24:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:59,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456560376] [2022-04-06 20:24:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:59,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:24:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:24:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:59,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:59,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456560376] [2022-04-06 20:24:59,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456560376] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:24:59,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79968757] [2022-04-06 20:24:59,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:24:59,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:59,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:59,678 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 20:24:59,679 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 20:24:59,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:24:59,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:59,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:24:59,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:59,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:00,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79968757] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:00,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:00,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 23 [2022-04-06 20:25:00,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:00,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1373861569] [2022-04-06 20:25:00,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1373861569] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:00,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:00,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:25:00,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104300333] [2022-04-06 20:25:00,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:00,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:25:00,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:00,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:25:00,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:25:00,051 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:00,180 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-06 20:25:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:25:00,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:25:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:00,181 INFO L225 Difference]: With dead ends: 36 [2022-04-06 20:25:00,181 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:25:00,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:25:00,182 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:00,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 44 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:25:00,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 20:25:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-04-06 20:25:00,187 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2022-04-06 20:25:00,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:00,187 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-04-06 20:25:00,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-04-06 20:25:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:25:00,187 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:00,188 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:00,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 20:25:00,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:00,400 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash 421425608, now seen corresponding path program 3 times [2022-04-06 20:25:00,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:00,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [266795159] [2022-04-06 20:25:00,401 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:00,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash 421425608, now seen corresponding path program 4 times [2022-04-06 20:25:00,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:00,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115053589] [2022-04-06 20:25:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:00,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:00,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:00,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:00,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115053589] [2022-04-06 20:25:00,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115053589] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:00,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006865079] [2022-04-06 20:25:00,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:00,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:00,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:00,501 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 20:25:00,502 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 20:25:00,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:00,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:00,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:25:00,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:00,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:00,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006865079] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:00,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:00,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 21 [2022-04-06 20:25:00,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:00,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [266795159] [2022-04-06 20:25:00,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [266795159] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:00,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:00,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:25:00,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045709704] [2022-04-06 20:25:00,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:00,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:25:00,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:25:00,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:25:00,851 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:00,975 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-06 20:25:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:25:00,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:25:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:00,975 INFO L225 Difference]: With dead ends: 38 [2022-04-06 20:25:00,975 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 20:25:00,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:25:00,976 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:00,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 54 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 20:25:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 20:25:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-04-06 20:25:00,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2022-04-06 20:25:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:00,980 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-04-06 20:25:00,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-04-06 20:25:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:25:00,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:00,981 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:01,001 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 20:25:01,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 20:25:01,182 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:01,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:01,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1089946779, now seen corresponding path program 5 times [2022-04-06 20:25:01,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:01,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [877121006] [2022-04-06 20:25:01,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:01,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:01,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1089946779, now seen corresponding path program 6 times [2022-04-06 20:25:01,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:01,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896577668] [2022-04-06 20:25:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:01,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:01,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:01,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:01,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896577668] [2022-04-06 20:25:01,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896577668] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:01,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078251233] [2022-04-06 20:25:01,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:01,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:01,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:01,287 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 20:25:01,288 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 20:25:01,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:01,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:25:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:25:01,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:25:01,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078251233] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:01,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:01,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 8] total 20 [2022-04-06 20:25:01,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:01,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [877121006] [2022-04-06 20:25:01,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [877121006] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:01,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:01,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:25:01,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332035538] [2022-04-06 20:25:01,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:01,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:25:01,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:01,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:25:01,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:25:01,571 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:01,734 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-04-06 20:25:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:25:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:25:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:01,735 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:25:01,735 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:25:01,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:25:01,736 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:01,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:25:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 20:25:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-04-06 20:25:01,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2022-04-06 20:25:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:01,740 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-04-06 20:25:01,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-04-06 20:25:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:25:01,741 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:01,741 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:01,757 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 20:25:01,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:01,951 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1819864638, now seen corresponding path program 7 times [2022-04-06 20:25:01,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:01,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2021547490] [2022-04-06 20:25:01,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:01,954 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:01,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1819864638, now seen corresponding path program 8 times [2022-04-06 20:25:01,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:01,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445242072] [2022-04-06 20:25:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:01,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:02,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:02,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:02,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445242072] [2022-04-06 20:25:02,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445242072] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:02,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737986563] [2022-04-06 20:25:02,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:02,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:02,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:02,081 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 20:25:02,111 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 20:25:02,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:02,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:25:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:02,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:02,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737986563] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:02,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:02,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-04-06 20:25:02,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:02,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2021547490] [2022-04-06 20:25:02,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2021547490] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:02,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:02,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:25:02,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730099439] [2022-04-06 20:25:02,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:02,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:25:02,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:25:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:25:02,560 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:02,748 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-04-06 20:25:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:25:02,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:25:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:02,749 INFO L225 Difference]: With dead ends: 42 [2022-04-06 20:25:02,749 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 20:25:02,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=347, Invalid=843, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:25:02,750 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:02,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 44 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 20:25:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 20:25:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-04-06 20:25:02,754 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2022-04-06 20:25:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:02,754 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-04-06 20:25:02,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-04-06 20:25:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:25:02,755 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:02,755 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:02,777 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 20:25:02,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 20:25:02,959 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:02,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1103709407, now seen corresponding path program 9 times [2022-04-06 20:25:02,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:02,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2079047932] [2022-04-06 20:25:02,961 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:02,961 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:02,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1103709407, now seen corresponding path program 10 times [2022-04-06 20:25:02,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:02,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851348200] [2022-04-06 20:25:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:03,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:03,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:03,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851348200] [2022-04-06 20:25:03,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851348200] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:03,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243328067] [2022-04-06 20:25:03,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:03,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:03,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:03,115 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 20:25:03,116 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 20:25:03,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:03,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:25:03,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:03,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:03,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243328067] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:03,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:03,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 27 [2022-04-06 20:25:03,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:03,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2079047932] [2022-04-06 20:25:03,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2079047932] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:03,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:03,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:25:03,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255896749] [2022-04-06 20:25:03,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:03,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:25:03,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:25:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:25:03,609 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:03,829 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-04-06 20:25:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:25:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:25:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:03,830 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:25:03,830 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:25:03,830 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:25:03,831 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:03,831 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 69 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:25:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 20:25:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-04-06 20:25:03,835 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2022-04-06 20:25:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:03,835 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-04-06 20:25:03,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-04-06 20:25:03,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:25:03,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:03,836 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:03,853 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 20:25:04,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 20:25:04,051 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:04,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1749755068, now seen corresponding path program 11 times [2022-04-06 20:25:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:04,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [447283550] [2022-04-06 20:25:04,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:04,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:04,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1749755068, now seen corresponding path program 12 times [2022-04-06 20:25:04,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:04,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459875032] [2022-04-06 20:25:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:04,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:04,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:04,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459875032] [2022-04-06 20:25:04,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459875032] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256542424] [2022-04-06 20:25:04,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:04,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:04,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:04,220 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 20:25:04,221 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 20:25:04,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:04,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:04,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:25:04,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:25:04,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:25:04,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256542424] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:04,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:04,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4, 8] total 23 [2022-04-06 20:25:04,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:04,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [447283550] [2022-04-06 20:25:04,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [447283550] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:04,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:04,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:25:04,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701133660] [2022-04-06 20:25:04,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:04,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:25:04,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:04,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:25:04,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:25:04,544 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:04,776 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-04-06 20:25:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:25:04,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:25:04,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:04,777 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:25:04,777 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:25:04,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:25:04,778 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:04,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 44 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:25:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 20:25:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-04-06 20:25:04,782 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2022-04-06 20:25:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:04,782 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-04-06 20:25:04,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:04,782 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-04-06 20:25:04,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:25:04,782 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:04,782 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:04,788 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 20:25:04,982 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:25:04,983 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash -170622631, now seen corresponding path program 13 times [2022-04-06 20:25:04,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:04,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768070039] [2022-04-06 20:25:04,984 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:04,985 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:04,985 INFO L85 PathProgramCache]: Analyzing trace with hash -170622631, now seen corresponding path program 14 times [2022-04-06 20:25:04,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:04,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320740281] [2022-04-06 20:25:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:04,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:05,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:05,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:05,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320740281] [2022-04-06 20:25:05,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320740281] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:05,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152115801] [2022-04-06 20:25:05,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:05,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:05,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:05,150 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 20:25:05,152 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 20:25:05,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:05,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:05,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:25:05,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:05,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:05,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152115801] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:05,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:05,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2022-04-06 20:25:05,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:05,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768070039] [2022-04-06 20:25:05,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768070039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:05,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:05,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:25:05,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515635681] [2022-04-06 20:25:05,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:05,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:25:05,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:05,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:25:05,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:25:05,826 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:06,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:06,096 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-04-06 20:25:06,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:25:06,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:25:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:06,097 INFO L225 Difference]: With dead ends: 48 [2022-04-06 20:25:06,097 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:25:06,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=527, Invalid=1365, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:25:06,098 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:06,098 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 54 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:25:06,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 20:25:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-04-06 20:25:06,102 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2022-04-06 20:25:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:06,102 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-04-06 20:25:06,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:06,102 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-04-06 20:25:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:25:06,102 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:06,102 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:06,119 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 20:25:06,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 20:25:06,315 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1182345910, now seen corresponding path program 15 times [2022-04-06 20:25:06,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:06,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1872860993] [2022-04-06 20:25:06,317 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:06,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:06,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1182345910, now seen corresponding path program 16 times [2022-04-06 20:25:06,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:06,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475451536] [2022-04-06 20:25:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:06,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:06,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:06,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:06,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475451536] [2022-04-06 20:25:06,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475451536] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:06,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871863134] [2022-04-06 20:25:06,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:06,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:06,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:06,509 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 20:25:06,510 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 20:25:06,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:06,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:06,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:25:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:06,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:07,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871863134] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:07,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:07,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-04-06 20:25:07,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:07,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1872860993] [2022-04-06 20:25:07,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1872860993] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:07,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:07,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:25:07,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279230452] [2022-04-06 20:25:07,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:07,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:25:07,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:07,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:25:07,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=803, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:25:07,044 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:07,399 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-04-06 20:25:07,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:25:07,399 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:25:07,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:07,399 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:25:07,399 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 20:25:07,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=611, Invalid=1645, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:25:07,401 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:07,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 79 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:07,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 20:25:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-06 20:25:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-04-06 20:25:07,414 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2022-04-06 20:25:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:07,414 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-04-06 20:25:07,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-04-06 20:25:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:25:07,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:07,415 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:07,431 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 20:25:07,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:07,622 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash 10023123, now seen corresponding path program 17 times [2022-04-06 20:25:07,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:07,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2097814772] [2022-04-06 20:25:07,624 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:07,624 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:07,624 INFO L85 PathProgramCache]: Analyzing trace with hash 10023123, now seen corresponding path program 18 times [2022-04-06 20:25:07,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:07,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243806106] [2022-04-06 20:25:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:07,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:07,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:07,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:07,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243806106] [2022-04-06 20:25:07,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243806106] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:07,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626611779] [2022-04-06 20:25:07,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:07,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:07,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:07,825 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 20:25:07,827 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 20:25:07,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:07,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:07,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:25:07,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 20:25:07,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 20:25:08,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626611779] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:08,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:08,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 8] total 26 [2022-04-06 20:25:08,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:08,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2097814772] [2022-04-06 20:25:08,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2097814772] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:08,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:08,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:25:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759744008] [2022-04-06 20:25:08,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:08,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:25:08,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:08,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:25:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:25:08,171 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:08,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:08,503 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-04-06 20:25:08,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:25:08,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:25:08,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:08,503 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:25:08,504 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 20:25:08,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:25:08,504 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:08,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 54 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 20:25:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 20:25:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-04-06 20:25:08,508 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2022-04-06 20:25:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:08,508 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-04-06 20:25:08,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-04-06 20:25:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:25:08,509 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:08,509 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:08,514 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 20:25:08,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 20:25:08,715 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1310743632, now seen corresponding path program 19 times [2022-04-06 20:25:08,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:08,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1199640761] [2022-04-06 20:25:08,716 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:08,716 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1310743632, now seen corresponding path program 20 times [2022-04-06 20:25:08,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:08,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666195962] [2022-04-06 20:25:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:08,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:08,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:08,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:08,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666195962] [2022-04-06 20:25:08,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666195962] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:08,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059791132] [2022-04-06 20:25:08,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:08,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:08,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:08,949 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 20:25:08,950 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 20:25:08,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:08,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:08,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:25:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:09,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:09,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059791132] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:09,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:09,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2022-04-06 20:25:09,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:09,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1199640761] [2022-04-06 20:25:09,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1199640761] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:09,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:09,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:25:09,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695609846] [2022-04-06 20:25:09,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:09,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:25:09,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:25:09,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:25:09,601 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:09,920 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-04-06 20:25:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:25:09,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:25:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:09,921 INFO L225 Difference]: With dead ends: 54 [2022-04-06 20:25:09,921 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 20:25:09,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=761, Invalid=2101, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:25:09,922 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:09,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 20:25:09,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 20:25:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-04-06 20:25:09,930 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2022-04-06 20:25:09,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:09,931 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-04-06 20:25:09,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-04-06 20:25:09,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:25:09,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:09,943 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:09,959 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 20:25:10,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:25:10,144 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash 742724429, now seen corresponding path program 21 times [2022-04-06 20:25:10,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:10,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1238101843] [2022-04-06 20:25:10,145 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:10,145 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash 742724429, now seen corresponding path program 22 times [2022-04-06 20:25:10,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:10,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893636266] [2022-04-06 20:25:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:10,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:10,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:10,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893636266] [2022-04-06 20:25:10,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893636266] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:10,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041125380] [2022-04-06 20:25:10,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:10,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:10,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:10,385 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 20:25:10,394 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 20:25:10,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:10,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:10,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:25:10,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:10,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:11,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041125380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:11,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:11,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 39 [2022-04-06 20:25:11,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:11,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1238101843] [2022-04-06 20:25:11,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1238101843] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:11,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:11,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:25:11,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511249969] [2022-04-06 20:25:11,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:11,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:25:11,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:11,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:25:11,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:25:11,304 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:11,712 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-04-06 20:25:11,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:25:11,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:25:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:11,713 INFO L225 Difference]: With dead ends: 56 [2022-04-06 20:25:11,713 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 20:25:11,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=823, Invalid=2257, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:25:11,714 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:11,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 84 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 20:25:11,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 20:25:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-04-06 20:25:11,718 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2022-04-06 20:25:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:11,718 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-04-06 20:25:11,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-04-06 20:25:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:25:11,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:11,719 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:11,737 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 20:25:11,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:11,929 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1559425110, now seen corresponding path program 23 times [2022-04-06 20:25:11,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:11,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [689688002] [2022-04-06 20:25:11,931 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:11,931 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:11,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1559425110, now seen corresponding path program 24 times [2022-04-06 20:25:11,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:11,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924533165] [2022-04-06 20:25:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:11,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:12,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:12,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924533165] [2022-04-06 20:25:12,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924533165] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652843913] [2022-04-06 20:25:12,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:12,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:12,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:12,194 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 20:25:12,195 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 20:25:12,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:12,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:12,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:25:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 20:25:12,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 20:25:12,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652843913] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:12,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:12,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 8] total 29 [2022-04-06 20:25:12,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:12,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [689688002] [2022-04-06 20:25:12,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [689688002] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:12,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:12,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:25:12,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758540425] [2022-04-06 20:25:12,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:12,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:25:12,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:12,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:25:12,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:25:12,551 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:12,988 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-04-06 20:25:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:25:12,988 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:25:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:12,988 INFO L225 Difference]: With dead ends: 58 [2022-04-06 20:25:12,989 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:25:12,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=1835, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:25:12,990 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:12,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 39 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:25:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-06 20:25:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-04-06 20:25:12,994 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2022-04-06 20:25:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:12,994 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-04-06 20:25:12,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-04-06 20:25:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:25:12,995 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:12,995 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:13,011 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 20:25:13,210 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:13,211 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:13,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2016974649, now seen corresponding path program 25 times [2022-04-06 20:25:13,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:13,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122148940] [2022-04-06 20:25:13,213 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:13,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:13,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2016974649, now seen corresponding path program 26 times [2022-04-06 20:25:13,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:13,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840400417] [2022-04-06 20:25:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:13,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:13,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:13,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840400417] [2022-04-06 20:25:13,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840400417] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801471023] [2022-04-06 20:25:13,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:13,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:13,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:13,483 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 20:25:13,484 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 20:25:13,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:13,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:13,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:25:13,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:13,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:14,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801471023] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:14,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:14,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2022-04-06 20:25:14,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:14,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122148940] [2022-04-06 20:25:14,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122148940] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:14,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:14,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:25:14,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368937883] [2022-04-06 20:25:14,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:14,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:25:14,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:14,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:25:14,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:25:14,300 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:14,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:14,764 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2022-04-06 20:25:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:25:14,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:25:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:14,765 INFO L225 Difference]: With dead ends: 60 [2022-04-06 20:25:14,765 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:25:14,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1016, Invalid=2890, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:25:14,767 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:14,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 89 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:25:14,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 20:25:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-04-06 20:25:14,771 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2022-04-06 20:25:14,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:14,771 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-04-06 20:25:14,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-04-06 20:25:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:25:14,772 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:14,772 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:14,789 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 20:25:14,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:14,975 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:14,976 INFO L85 PathProgramCache]: Analyzing trace with hash 659549860, now seen corresponding path program 27 times [2022-04-06 20:25:14,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:14,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [331722586] [2022-04-06 20:25:14,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:14,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:14,977 INFO L85 PathProgramCache]: Analyzing trace with hash 659549860, now seen corresponding path program 28 times [2022-04-06 20:25:14,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:14,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169370798] [2022-04-06 20:25:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:14,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:15,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:15,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:15,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169370798] [2022-04-06 20:25:15,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169370798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:15,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72172091] [2022-04-06 20:25:15,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:15,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:15,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:15,237 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 20:25:15,238 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 20:25:15,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:15,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:15,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:25:15,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:15,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:16,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72172091] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:16,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:16,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 45 [2022-04-06 20:25:16,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:16,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [331722586] [2022-04-06 20:25:16,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [331722586] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:16,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:16,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:25:16,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455900926] [2022-04-06 20:25:16,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:16,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:25:16,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:16,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:25:16,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1431, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:25:16,356 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:16,878 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-04-06 20:25:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:25:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:25:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:16,880 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:25:16,880 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 20:25:16,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:25:16,882 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:16,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 109 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:25:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 20:25:16,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 20:25:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-04-06 20:25:16,886 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2022-04-06 20:25:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:16,886 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-04-06 20:25:16,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-04-06 20:25:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:25:16,887 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:16,887 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:16,906 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 20:25:17,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 20:25:17,087 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:17,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:17,088 INFO L85 PathProgramCache]: Analyzing trace with hash 114192705, now seen corresponding path program 29 times [2022-04-06 20:25:17,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:17,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [175366150] [2022-04-06 20:25:17,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:17,089 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:17,089 INFO L85 PathProgramCache]: Analyzing trace with hash 114192705, now seen corresponding path program 30 times [2022-04-06 20:25:17,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:17,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7411229] [2022-04-06 20:25:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:17,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:17,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:17,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:17,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7411229] [2022-04-06 20:25:17,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7411229] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:17,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909367357] [2022-04-06 20:25:17,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:17,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:17,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:17,395 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 20:25:17,395 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 20:25:17,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:17,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:17,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:25:17,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 20:25:17,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 20:25:17,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909367357] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:17,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:17,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 4, 8] total 32 [2022-04-06 20:25:17,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:17,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [175366150] [2022-04-06 20:25:17,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [175366150] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:17,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:17,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:25:17,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933020191] [2022-04-06 20:25:17,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:17,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:25:17,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:17,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:25:17,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:25:17,806 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:18,391 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-04-06 20:25:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:25:18,392 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:25:18,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:18,392 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:25:18,392 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 20:25:18,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=2378, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:25:18,394 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:18,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:25:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 20:25:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 20:25:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-04-06 20:25:18,398 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2022-04-06 20:25:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:18,398 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-04-06 20:25:18,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-04-06 20:25:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:25:18,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:18,398 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:18,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 20:25:18,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 20:25:18,607 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:18,608 INFO L85 PathProgramCache]: Analyzing trace with hash 11976862, now seen corresponding path program 31 times [2022-04-06 20:25:18,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:18,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1873961195] [2022-04-06 20:25:18,609 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:18,609 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash 11976862, now seen corresponding path program 32 times [2022-04-06 20:25:18,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:18,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42829870] [2022-04-06 20:25:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:18,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:18,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:18,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:18,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42829870] [2022-04-06 20:25:18,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42829870] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:18,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837462008] [2022-04-06 20:25:18,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:18,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:18,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:18,923 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 20:25:18,923 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 20:25:18,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:18,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:18,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:25:18,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:19,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:20,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837462008] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:20,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:20,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 49 [2022-04-06 20:25:20,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:20,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1873961195] [2022-04-06 20:25:20,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1873961195] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:20,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:20,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:25:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823297575] [2022-04-06 20:25:20,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:20,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:25:20,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:25:20,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1705, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:25:20,259 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:20,884 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-04-06 20:25:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:25:20,884 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:25:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:20,885 INFO L225 Difference]: With dead ends: 66 [2022-04-06 20:25:20,885 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:25:20,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1283, Invalid=3687, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:25:20,886 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:20,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 94 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:25:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:25:20,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 20:25:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-04-06 20:25:20,890 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2022-04-06 20:25:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:20,890 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-04-06 20:25:20,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-04-06 20:25:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:25:20,891 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:20,891 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:20,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 20:25:21,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:21,103 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash 566799547, now seen corresponding path program 33 times [2022-04-06 20:25:21,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:21,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [167304576] [2022-04-06 20:25:21,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:21,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:21,105 INFO L85 PathProgramCache]: Analyzing trace with hash 566799547, now seen corresponding path program 34 times [2022-04-06 20:25:21,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:21,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944104734] [2022-04-06 20:25:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:21,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:21,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:21,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944104734] [2022-04-06 20:25:21,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944104734] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:21,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18197342] [2022-04-06 20:25:21,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:21,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:21,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:21,444 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 20:25:21,445 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 20:25:21,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:21,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:25:21,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:21,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:22,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18197342] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:22,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:22,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-04-06 20:25:22,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:22,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [167304576] [2022-04-06 20:25:22,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [167304576] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:22,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:22,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:25:22,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906883239] [2022-04-06 20:25:22,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:22,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:25:22,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:22,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:25:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=1851, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:25:22,885 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:23,586 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-04-06 20:25:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:25:23,586 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:25:23,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:23,587 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:25:23,587 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 20:25:23,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1387, Invalid=4015, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:25:23,588 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:23,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 129 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:25:23,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 20:25:23,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-04-06 20:25:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-04-06 20:25:23,593 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2022-04-06 20:25:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:23,593 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-04-06 20:25:23,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-04-06 20:25:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:25:23,593 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:23,593 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:23,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 20:25:23,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:23,799 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:23,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:23,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1175455128, now seen corresponding path program 35 times [2022-04-06 20:25:23,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:23,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [787514096] [2022-04-06 20:25:23,801 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:23,801 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:23,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1175455128, now seen corresponding path program 36 times [2022-04-06 20:25:23,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:23,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245160998] [2022-04-06 20:25:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:23,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:24,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:24,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:24,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245160998] [2022-04-06 20:25:24,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245160998] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:24,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674451838] [2022-04-06 20:25:24,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:24,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:24,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:24,150 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 20:25:24,150 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 20:25:24,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:24,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:24,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:25:24,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 1 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-04-06 20:25:24,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 1 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-04-06 20:25:24,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674451838] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:24,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:24,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 4, 8] total 35 [2022-04-06 20:25:24,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [787514096] [2022-04-06 20:25:24,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [787514096] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:24,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:24,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:25:24,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397396435] [2022-04-06 20:25:24,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:24,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:25:24,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:25:24,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:25:24,556 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:25,255 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-04-06 20:25:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:25:25,256 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:25:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:25,256 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:25:25,256 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:25:25,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=429, Invalid=2993, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:25:25,257 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:25,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 84 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:25:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:25:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-04-06 20:25:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-04-06 20:25:25,261 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2022-04-06 20:25:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:25,262 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-04-06 20:25:25,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-04-06 20:25:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:25:25,262 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:25,262 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:25,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 20:25:25,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:25:25,466 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:25,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1977916213, now seen corresponding path program 37 times [2022-04-06 20:25:25,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:25,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1367484331] [2022-04-06 20:25:25,467 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:25,467 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1977916213, now seen corresponding path program 38 times [2022-04-06 20:25:25,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:25,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643319364] [2022-04-06 20:25:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:25,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:25,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:25,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:25,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643319364] [2022-04-06 20:25:25,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643319364] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:25,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373538735] [2022-04-06 20:25:25,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:25,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:25,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:25,828 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 20:25:25,829 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 20:25:25,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:25,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:25,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:25:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:26,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:27,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373538735] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:27,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:27,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2022-04-06 20:25:27,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:27,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1367484331] [2022-04-06 20:25:27,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1367484331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:27,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:27,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:25:27,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604057237] [2022-04-06 20:25:27,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:27,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:25:27,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:25:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=2244, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:25:27,050 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:27,799 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-04-06 20:25:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:25:27,799 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:25:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:27,800 INFO L225 Difference]: With dead ends: 72 [2022-04-06 20:25:27,800 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 20:25:27,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1634, Invalid=4846, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:25:27,801 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:27,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 104 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:25:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 20:25:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-04-06 20:25:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-04-06 20:25:27,807 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2022-04-06 20:25:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:27,807 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-04-06 20:25:27,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-04-06 20:25:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:25:27,807 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:27,808 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:27,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:28,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:25:28,015 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash 48905618, now seen corresponding path program 39 times [2022-04-06 20:25:28,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:28,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [901382884] [2022-04-06 20:25:28,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:28,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash 48905618, now seen corresponding path program 40 times [2022-04-06 20:25:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:28,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930764859] [2022-04-06 20:25:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:28,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:28,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:28,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:28,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930764859] [2022-04-06 20:25:28,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930764859] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:28,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676140359] [2022-04-06 20:25:28,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:28,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:28,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:28,435 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 20:25:28,436 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 20:25:28,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:28,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:28,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:25:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:28,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:30,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676140359] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:30,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:30,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 57 [2022-04-06 20:25:30,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:30,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [901382884] [2022-04-06 20:25:30,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [901382884] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:30,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:30,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:25:30,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37946230] [2022-04-06 20:25:30,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:30,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:25:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:30,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:25:30,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2325, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:25:30,173 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:30,932 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-04-06 20:25:30,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:25:30,933 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 20:25:30,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:30,933 INFO L225 Difference]: With dead ends: 74 [2022-04-06 20:25:30,933 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 20:25:30,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1723, Invalid=5083, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:25:30,934 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:30,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 54 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:25:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 20:25:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-04-06 20:25:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-04-06 20:25:30,938 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2022-04-06 20:25:30,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:30,938 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-04-06 20:25:30,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:30,938 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-04-06 20:25:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:25:30,939 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:30,939 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:30,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 20:25:31,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:25:31,155 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:31,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1695595695, now seen corresponding path program 41 times [2022-04-06 20:25:31,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:31,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1264927619] [2022-04-06 20:25:31,156 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:31,157 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:31,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1695595695, now seen corresponding path program 42 times [2022-04-06 20:25:31,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:31,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49698664] [2022-04-06 20:25:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:31,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:31,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:31,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49698664] [2022-04-06 20:25:31,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49698664] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:31,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508810671] [2022-04-06 20:25:31,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:31,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:31,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:31,591 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 20:25:31,592 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 20:25:31,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:31,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:31,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:25:31,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 20:25:31,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 20:25:32,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508810671] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:32,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:32,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 4, 8] total 38 [2022-04-06 20:25:32,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:32,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1264927619] [2022-04-06 20:25:32,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1264927619] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:32,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:32,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:25:32,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135389087] [2022-04-06 20:25:32,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:32,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:25:32,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:32,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:25:32,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:25:32,078 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:32,923 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2022-04-06 20:25:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:25:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:25:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:32,923 INFO L225 Difference]: With dead ends: 76 [2022-04-06 20:25:32,923 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 20:25:32,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=480, Invalid=3680, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:25:32,924 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:32,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 84 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:25:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 20:25:32,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-04-06 20:25:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-04-06 20:25:32,929 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2022-04-06 20:25:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:32,929 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-04-06 20:25:32,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-04-06 20:25:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:25:32,929 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:32,929 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:32,945 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 20:25:33,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:25:33,144 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash -678172532, now seen corresponding path program 43 times [2022-04-06 20:25:33,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:33,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [728872973] [2022-04-06 20:25:33,145 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:33,145 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:33,146 INFO L85 PathProgramCache]: Analyzing trace with hash -678172532, now seen corresponding path program 44 times [2022-04-06 20:25:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:33,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790758232] [2022-04-06 20:25:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:33,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:33,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:33,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790758232] [2022-04-06 20:25:33,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790758232] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:33,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003060955] [2022-04-06 20:25:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:33,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:33,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:33,578 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 20:25:33,579 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 20:25:33,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:33,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:33,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:25:33,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:33,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:35,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003060955] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:35,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:35,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 62 [2022-04-06 20:25:35,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:35,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [728872973] [2022-04-06 20:25:35,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [728872973] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:35,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:35,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:25:35,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314554155] [2022-04-06 20:25:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:35,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:25:35,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:25:35,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=2763, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:25:35,095 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:35,953 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2022-04-06 20:25:35,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:25:35,953 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:25:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:35,954 INFO L225 Difference]: With dead ends: 78 [2022-04-06 20:25:35,954 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:25:35,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1997, Invalid=6013, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:25:35,956 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:35,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 109 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:25:35,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:25:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 20:25:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-04-06 20:25:35,961 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2022-04-06 20:25:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:35,961 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-04-06 20:25:35,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-04-06 20:25:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:25:35,961 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:35,961 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:35,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 20:25:36,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:36,175 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:36,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:36,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1241804503, now seen corresponding path program 45 times [2022-04-06 20:25:36,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:36,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1170580864] [2022-04-06 20:25:36,177 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:36,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:36,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1241804503, now seen corresponding path program 46 times [2022-04-06 20:25:36,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:36,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064025742] [2022-04-06 20:25:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:36,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:36,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:36,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:36,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064025742] [2022-04-06 20:25:36,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064025742] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:36,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249502160] [2022-04-06 20:25:36,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:36,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:36,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:36,660 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 20:25:36,687 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 20:25:36,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:36,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:25:36,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:36,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:38,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249502160] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:38,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:38,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 32] total 63 [2022-04-06 20:25:38,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:38,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1170580864] [2022-04-06 20:25:38,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1170580864] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:38,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:38,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:25:38,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696849389] [2022-04-06 20:25:38,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:38,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:25:38,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:38,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:25:38,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=2853, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:25:38,737 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:39,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:39,708 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2022-04-06 20:25:39,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:25:39,709 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 20:25:39,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:39,711 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:25:39,711 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:25:39,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2095, Invalid=6277, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:25:39,713 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:39,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 129 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:25:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:25:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-04-06 20:25:39,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-04-06 20:25:39,718 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2022-04-06 20:25:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:39,718 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-04-06 20:25:39,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:39,718 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-04-06 20:25:39,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:25:39,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:39,718 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:39,735 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 20:25:39,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:39,931 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:39,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1726249338, now seen corresponding path program 47 times [2022-04-06 20:25:39,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:39,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2044655534] [2022-04-06 20:25:39,933 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:39,933 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:39,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1726249338, now seen corresponding path program 48 times [2022-04-06 20:25:39,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:39,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361377311] [2022-04-06 20:25:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:39,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:40,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:40,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:40,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361377311] [2022-04-06 20:25:40,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361377311] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:40,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273623189] [2022-04-06 20:25:40,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:40,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:40,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:40,410 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 20:25:40,410 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 20:25:40,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:40,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:40,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:25:40,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-04-06 20:25:40,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-04-06 20:25:40,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273623189] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:40,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:40,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 4, 8] total 41 [2022-04-06 20:25:40,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:40,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2044655534] [2022-04-06 20:25:40,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2044655534] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:40,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:40,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:25:40,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180610864] [2022-04-06 20:25:40,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:40,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:25:40,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:40,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:25:40,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:25:40,885 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:41,941 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-04-06 20:25:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:25:41,941 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 20:25:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:41,943 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:25:41,943 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 20:25:41,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=531, Invalid=4439, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:25:41,947 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:41,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 109 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:25:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 20:25:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-06 20:25:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-04-06 20:25:41,956 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2022-04-06 20:25:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:41,956 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-04-06 20:25:41,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-04-06 20:25:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 20:25:41,956 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:41,956 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:41,960 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 20:25:42,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 20:25:42,160 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:42,161 INFO L85 PathProgramCache]: Analyzing trace with hash 873699491, now seen corresponding path program 49 times [2022-04-06 20:25:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:42,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1155053205] [2022-04-06 20:25:42,162 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:42,162 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash 873699491, now seen corresponding path program 50 times [2022-04-06 20:25:42,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:42,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280336412] [2022-04-06 20:25:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:42,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:42,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:42,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:42,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280336412] [2022-04-06 20:25:42,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280336412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:42,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512224918] [2022-04-06 20:25:42,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:42,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:42,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:42,675 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 20:25:42,675 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 20:25:42,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:42,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:25:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:42,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:44,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512224918] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:44,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:44,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2022-04-06 20:25:44,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:44,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1155053205] [2022-04-06 20:25:44,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1155053205] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:44,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:44,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:25:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477363546] [2022-04-06 20:25:44,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:44,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:25:44,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:25:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=3336, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:25:44,401 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:45,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:45,427 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2022-04-06 20:25:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:25:45,428 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 20:25:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:45,428 INFO L225 Difference]: With dead ends: 84 [2022-04-06 20:25:45,428 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 20:25:45,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2396, Invalid=7306, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:25:45,430 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:45,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 54 Invalid, 1944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:25:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 20:25:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-04-06 20:25:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-04-06 20:25:45,434 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2022-04-06 20:25:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:45,435 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-04-06 20:25:45,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-04-06 20:25:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 20:25:45,435 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:45,435 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:45,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 20:25:45,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:45,636 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:45,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:45,636 INFO L85 PathProgramCache]: Analyzing trace with hash -246442112, now seen corresponding path program 51 times [2022-04-06 20:25:45,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:45,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1485857421] [2022-04-06 20:25:45,637 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:45,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:45,637 INFO L85 PathProgramCache]: Analyzing trace with hash -246442112, now seen corresponding path program 52 times [2022-04-06 20:25:45,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:45,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219617515] [2022-04-06 20:25:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:45,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:46,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:46,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:46,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219617515] [2022-04-06 20:25:46,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219617515] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:46,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875227506] [2022-04-06 20:25:46,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:46,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:46,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:46,155 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 20:25:46,155 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 20:25:46,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:46,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:25:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:46,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:48,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875227506] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:48,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:48,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 35] total 69 [2022-04-06 20:25:48,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:48,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1485857421] [2022-04-06 20:25:48,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1485857421] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:48,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:48,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:25:48,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258529309] [2022-04-06 20:25:48,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:48,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:25:48,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:25:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1257, Invalid=3435, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:25:48,522 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:49,596 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2022-04-06 20:25:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:25:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 20:25:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:49,597 INFO L225 Difference]: With dead ends: 86 [2022-04-06 20:25:49,597 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 20:25:49,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:25:49,598 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:49,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 74 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:25:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 20:25:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-04-06 20:25:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-04-06 20:25:49,604 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2022-04-06 20:25:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:49,604 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-04-06 20:25:49,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-04-06 20:25:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:25:49,604 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:49,604 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:49,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 20:25:49,805 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:49,805 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:49,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1334268701, now seen corresponding path program 53 times [2022-04-06 20:25:49,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:49,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1946025796] [2022-04-06 20:25:49,807 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:49,807 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:49,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1334268701, now seen corresponding path program 54 times [2022-04-06 20:25:49,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:49,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158402270] [2022-04-06 20:25:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:49,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:50,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:50,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:50,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158402270] [2022-04-06 20:25:50,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158402270] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:50,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762984469] [2022-04-06 20:25:50,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:50,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:50,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:50,344 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 20:25:50,344 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 20:25:50,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:50,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:50,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:25:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 20:25:50,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 20:25:50,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762984469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:50,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:50,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 4, 8] total 44 [2022-04-06 20:25:50,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:50,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1946025796] [2022-04-06 20:25:50,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1946025796] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:50,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:50,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:25:50,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779520033] [2022-04-06 20:25:50,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:50,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:25:50,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:50,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:25:50,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:25:50,821 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:51,990 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-04-06 20:25:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:25:51,990 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 20:25:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:51,991 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:25:51,991 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:25:51,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=582, Invalid=5270, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:25:51,992 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:51,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 49 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:25:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:25:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-04-06 20:25:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-04-06 20:25:52,001 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2022-04-06 20:25:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:52,001 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-04-06 20:25:52,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-04-06 20:25:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 20:25:52,001 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:52,001 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:52,017 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 20:25:52,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 20:25:52,202 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash -21062790, now seen corresponding path program 55 times [2022-04-06 20:25:52,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:52,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [405305131] [2022-04-06 20:25:52,204 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:52,204 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -21062790, now seen corresponding path program 56 times [2022-04-06 20:25:52,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:52,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223488880] [2022-04-06 20:25:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:52,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:52,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:52,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:52,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223488880] [2022-04-06 20:25:52,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223488880] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:52,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901761944] [2022-04-06 20:25:52,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:52,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:52,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:52,771 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 20:25:52,772 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 20:25:52,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:52,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:52,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:25:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:53,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:54,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901761944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:54,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:54,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 74 [2022-04-06 20:25:54,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:54,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [405305131] [2022-04-06 20:25:54,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [405305131] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:54,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:54,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:25:54,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103484513] [2022-04-06 20:25:54,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:54,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:25:54,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:25:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=3963, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:25:54,753 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:55,988 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2022-04-06 20:25:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:25:55,988 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 20:25:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:55,989 INFO L225 Difference]: With dead ends: 90 [2022-04-06 20:25:55,989 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 20:25:55,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2831, Invalid=8725, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:25:55,990 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:55,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 124 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:25:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 20:25:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-06 20:25:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-04-06 20:25:55,995 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2022-04-06 20:25:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:55,995 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-04-06 20:25:55,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-04-06 20:25:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 20:25:55,995 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:55,996 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:56,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 20:25:56,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 20:25:56,196 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1119534953, now seen corresponding path program 57 times [2022-04-06 20:25:56,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:56,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1099517435] [2022-04-06 20:25:56,200 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:56,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:56,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1119534953, now seen corresponding path program 58 times [2022-04-06 20:25:56,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:56,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159028592] [2022-04-06 20:25:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:56,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:56,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:56,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:56,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159028592] [2022-04-06 20:25:56,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159028592] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:56,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955250472] [2022-04-06 20:25:56,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:56,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:56,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:56,801 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 20:25:56,802 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 20:25:56,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:56,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:56,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:25:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:57,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:58,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955250472] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:58,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:58,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2022-04-06 20:25:58,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:58,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1099517435] [2022-04-06 20:25:58,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1099517435] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:58,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:58,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:25:58,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713907201] [2022-04-06 20:25:58,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:58,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:25:58,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:58,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:25:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1516, Invalid=4184, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:25:58,924 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:00,212 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-04-06 20:26:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:26:00,213 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 20:26:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:00,213 INFO L225 Difference]: With dead ends: 92 [2022-04-06 20:26:00,213 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 20:26:00,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2984, Invalid=9226, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:26:00,214 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:00,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 39 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:26:00,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 20:26:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 20:26:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-04-06 20:26:00,223 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2022-04-06 20:26:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:00,224 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-04-06 20:26:00,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-04-06 20:26:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:26:00,224 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:00,224 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:00,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:00,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 20:26:00,425 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:00,425 INFO L85 PathProgramCache]: Analyzing trace with hash -189328780, now seen corresponding path program 59 times [2022-04-06 20:26:00,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:00,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1552450184] [2022-04-06 20:26:00,426 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:00,426 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:00,426 INFO L85 PathProgramCache]: Analyzing trace with hash -189328780, now seen corresponding path program 60 times [2022-04-06 20:26:00,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:00,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332658780] [2022-04-06 20:26:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:00,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:01,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:01,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:01,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332658780] [2022-04-06 20:26:01,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332658780] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:01,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952280995] [2022-04-06 20:26:01,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:26:01,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:01,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:01,037 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:01,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:26:01,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:26:01,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:01,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:26:01,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:26:01,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:26:01,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952280995] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:01,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:01,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 4, 8] total 47 [2022-04-06 20:26:01,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1552450184] [2022-04-06 20:26:01,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1552450184] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:01,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:01,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:26:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483655932] [2022-04-06 20:26:01,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:01,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:26:01,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:01,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:26:01,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1885, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:26:01,562 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:02,941 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-04-06 20:26:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:26:02,942 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 20:26:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:02,942 INFO L225 Difference]: With dead ends: 94 [2022-04-06 20:26:02,942 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:26:02,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=633, Invalid=6173, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:26:02,943 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:02,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 2585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:26:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:26:02,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-06 20:26:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-04-06 20:26:02,949 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 83 [2022-04-06 20:26:02,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:02,949 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-04-06 20:26:02,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-04-06 20:26:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 20:26:02,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:02,950 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:02,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:03,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:03,153 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:03,154 INFO L85 PathProgramCache]: Analyzing trace with hash 385605905, now seen corresponding path program 61 times [2022-04-06 20:26:03,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:03,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1244475263] [2022-04-06 20:26:03,155 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:03,155 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:03,155 INFO L85 PathProgramCache]: Analyzing trace with hash 385605905, now seen corresponding path program 62 times [2022-04-06 20:26:03,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:03,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939835684] [2022-04-06 20:26:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:03,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:03,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:03,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939835684] [2022-04-06 20:26:03,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939835684] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:03,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970436405] [2022-04-06 20:26:03,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:26:03,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:03,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:03,826 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:03,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:26:03,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:26:03,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:03,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:26:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:04,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:06,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970436405] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:06,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:06,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2022-04-06 20:26:06,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1244475263] [2022-04-06 20:26:06,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1244475263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:06,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:06,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:26:06,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493432606] [2022-04-06 20:26:06,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:06,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:26:06,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:26:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1676, Invalid=4644, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:26:06,205 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:07,638 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-04-06 20:26:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:26:07,639 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 20:26:07,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:07,639 INFO L225 Difference]: With dead ends: 96 [2022-04-06 20:26:07,639 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 20:26:07,640 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3302, Invalid=10270, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:26:07,640 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2673 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:07,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 2748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2673 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:26:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 20:26:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-04-06 20:26:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-04-06 20:26:07,645 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2022-04-06 20:26:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:07,646 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-04-06 20:26:07,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-04-06 20:26:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 20:26:07,646 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:07,646 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:07,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 20:26:07,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:26:07,858 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1152942994, now seen corresponding path program 63 times [2022-04-06 20:26:07,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:07,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [175460557] [2022-04-06 20:26:07,860 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:07,860 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:07,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1152942994, now seen corresponding path program 64 times [2022-04-06 20:26:07,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:07,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824053448] [2022-04-06 20:26:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:07,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:08,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:08,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:08,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824053448] [2022-04-06 20:26:08,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824053448] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:08,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403012350] [2022-04-06 20:26:08,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:26:08,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:08,538 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:08,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:26:08,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:26:08,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:08,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:26:08,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:08,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:10,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403012350] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:10,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:10,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 82 [2022-04-06 20:26:10,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:10,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [175460557] [2022-04-06 20:26:10,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [175460557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:10,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:10,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:26:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243981834] [2022-04-06 20:26:10,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:10,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:26:10,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:26:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1759, Invalid=4883, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:26:10,924 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:12,476 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-04-06 20:26:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:26:12,477 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-04-06 20:26:12,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:12,477 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:26:12,477 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 20:26:12,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3467, Invalid=10813, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:26:12,479 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2964 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:12,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 169 Invalid, 3041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2964 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:26:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 20:26:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-06 20:26:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-04-06 20:26:12,484 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2022-04-06 20:26:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:12,484 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-04-06 20:26:12,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-04-06 20:26:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:26:12,485 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:12,485 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:12,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-04-06 20:26:12,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:26:12,686 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:12,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:12,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2065282187, now seen corresponding path program 65 times [2022-04-06 20:26:12,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:12,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1866893965] [2022-04-06 20:26:12,687 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:12,687 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:12,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2065282187, now seen corresponding path program 66 times [2022-04-06 20:26:12,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:12,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990671191] [2022-04-06 20:26:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:12,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:13,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:13,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990671191] [2022-04-06 20:26:13,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990671191] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:13,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835516967] [2022-04-06 20:26:13,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:26:13,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:13,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:13,402 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:13,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:26:13,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:26:13,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:26:13,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 20:26:13,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 20:26:13,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835516967] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:13,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:13,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 4, 8] total 50 [2022-04-06 20:26:13,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:13,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1866893965] [2022-04-06 20:26:13,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1866893965] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:13,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:13,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:26:13,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330874043] [2022-04-06 20:26:13,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:13,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:26:13,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:26:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2152, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:26:13,958 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:15,595 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2022-04-06 20:26:15,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:26:15,596 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 20:26:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:15,596 INFO L225 Difference]: With dead ends: 100 [2022-04-06 20:26:15,596 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:26:15,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=684, Invalid=7148, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:26:15,599 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3121 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:15,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 174 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3121 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:26:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:26:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-04-06 20:26:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-04-06 20:26:15,605 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2022-04-06 20:26:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:15,605 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-04-06 20:26:15,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-04-06 20:26:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 20:26:15,605 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:15,605 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:15,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:15,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:15,806 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:15,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:15,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1891739288, now seen corresponding path program 67 times [2022-04-06 20:26:15,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:15,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [126673258] [2022-04-06 20:26:15,808 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:15,808 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:15,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1891739288, now seen corresponding path program 68 times [2022-04-06 20:26:15,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329066536] [2022-04-06 20:26:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:15,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:16,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:16,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:16,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329066536] [2022-04-06 20:26:16,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329066536] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:16,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773445710] [2022-04-06 20:26:16,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:26:16,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:16,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:16,543 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:16,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:26:16,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:26:16,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 20:26:16,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:16,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:20,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773445710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:20,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:20,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 43] total 85 [2022-04-06 20:26:20,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:20,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [126673258] [2022-04-06 20:26:20,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [126673258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:20,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:20,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:26:20,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873981744] [2022-04-06 20:26:20,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:20,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:26:20,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:20,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:26:20,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1889, Invalid=5251, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:26:20,049 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:21,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:21,717 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2022-04-06 20:26:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:26:21,718 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 20:26:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:21,718 INFO L225 Difference]: With dead ends: 102 [2022-04-06 20:26:21,718 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 20:26:21,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3767, Invalid=11733, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:26:21,719 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:21,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 84 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3168 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:26:21,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 20:26:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-04-06 20:26:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-04-06 20:26:21,725 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 91 [2022-04-06 20:26:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:21,725 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-04-06 20:26:21,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-04-06 20:26:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 20:26:21,726 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:21,726 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:21,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:21,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 20:26:21,933 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:21,934 INFO L85 PathProgramCache]: Analyzing trace with hash 751647493, now seen corresponding path program 69 times [2022-04-06 20:26:21,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:21,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [759052050] [2022-04-06 20:26:21,935 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:21,935 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash 751647493, now seen corresponding path program 70 times [2022-04-06 20:26:21,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:21,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059486769] [2022-04-06 20:26:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:21,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:22,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:22,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:22,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059486769] [2022-04-06 20:26:22,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059486769] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:22,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811458450] [2022-04-06 20:26:22,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:26:22,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:22,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:22,739 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:22,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:26:22,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:26:22,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:22,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 20:26:22,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:23,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:26,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811458450] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:26,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:26,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 44] total 87 [2022-04-06 20:26:26,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:26,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [759052050] [2022-04-06 20:26:26,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [759052050] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:26,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:26,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:26:26,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103903421] [2022-04-06 20:26:26,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:26,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:26:26,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:26:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1977, Invalid=5505, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:26:26,352 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:28,097 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2022-04-06 20:26:28,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:26:28,098 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 20:26:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:28,098 INFO L225 Difference]: With dead ends: 104 [2022-04-06 20:26:28,098 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 20:26:28,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3943, Invalid=12313, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:26:28,099 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3417 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 3500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:28,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 159 Invalid, 3500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3417 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:26:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 20:26:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-04-06 20:26:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-04-06 20:26:28,105 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2022-04-06 20:26:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:28,106 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-04-06 20:26:28,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:28,106 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-04-06 20:26:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:26:28,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:28,106 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:28,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 20:26:28,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:28,311 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1574295198, now seen corresponding path program 71 times [2022-04-06 20:26:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:28,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [801126758] [2022-04-06 20:26:28,313 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:28,313 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:28,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1574295198, now seen corresponding path program 72 times [2022-04-06 20:26:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:28,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385842403] [2022-04-06 20:26:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:29,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:29,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385842403] [2022-04-06 20:26:29,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385842403] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691411454] [2022-04-06 20:26:29,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:26:29,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:29,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:29,119 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:29,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:26:29,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:26:29,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:29,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:26:29,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-04-06 20:26:29,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-04-06 20:26:29,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691411454] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:29,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:29,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 4, 8] total 53 [2022-04-06 20:26:29,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:29,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [801126758] [2022-04-06 20:26:29,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [801126758] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:29,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:29,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:26:29,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488418577] [2022-04-06 20:26:29,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:29,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:26:29,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:29,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:26:29,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2437, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:26:29,697 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:31,494 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-04-06 20:26:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:26:31,494 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-04-06 20:26:31,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:31,495 INFO L225 Difference]: With dead ends: 106 [2022-04-06 20:26:31,495 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 20:26:31,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=735, Invalid=8195, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:26:31,496 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 3412 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:31,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 19 Invalid, 3497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3412 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:26:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 20:26:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-04-06 20:26:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-04-06 20:26:31,502 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2022-04-06 20:26:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:31,502 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-04-06 20:26:31,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-04-06 20:26:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 20:26:31,502 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:31,503 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:31,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:31,718 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:31,719 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:31,719 INFO L85 PathProgramCache]: Analyzing trace with hash 872739967, now seen corresponding path program 73 times [2022-04-06 20:26:31,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:31,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306932653] [2022-04-06 20:26:31,720 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:31,720 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash 872739967, now seen corresponding path program 74 times [2022-04-06 20:26:31,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:31,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348916145] [2022-04-06 20:26:31,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:31,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:32,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:32,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:32,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348916145] [2022-04-06 20:26:32,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348916145] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:32,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370343309] [2022-04-06 20:26:32,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:26:32,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:32,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:32,575 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:32,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:26:32,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:26:32,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:32,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:26:32,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:32,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:35,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370343309] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:35,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:35,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 92 [2022-04-06 20:26:35,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306932653] [2022-04-06 20:26:35,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306932653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:35,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:35,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:26:35,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284526240] [2022-04-06 20:26:35,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:35,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:26:35,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:35,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:26:35,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2204, Invalid=6168, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:26:35,661 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:37,569 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-04-06 20:26:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:26:37,569 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-04-06 20:26:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:37,570 INFO L225 Difference]: With dead ends: 108 [2022-04-06 20:26:37,570 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:26:37,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4352, Invalid=13738, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:26:37,571 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3783 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:37,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 189 Invalid, 3870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3783 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:26:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:26:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 20:26:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-04-06 20:26:37,577 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2022-04-06 20:26:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:37,577 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-04-06 20:26:37,577 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-04-06 20:26:37,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 20:26:37,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:37,578 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:37,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 20:26:37,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 20:26:37,786 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:37,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:37,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1168544676, now seen corresponding path program 75 times [2022-04-06 20:26:37,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:37,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [219218651] [2022-04-06 20:26:37,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:37,788 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:37,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1168544676, now seen corresponding path program 76 times [2022-04-06 20:26:37,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:37,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775958832] [2022-04-06 20:26:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:37,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:38,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:38,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:38,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775958832] [2022-04-06 20:26:38,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775958832] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:38,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599348846] [2022-04-06 20:26:38,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:26:38,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:38,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:38,677 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:38,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:26:38,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:26:38,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:38,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 20:26:38,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:39,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:41,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599348846] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:41,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:41,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2022-04-06 20:26:41,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:41,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [219218651] [2022-04-06 20:26:41,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [219218651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:41,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:41,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:26:41,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078123452] [2022-04-06 20:26:41,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:41,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:26:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:26:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2299, Invalid=6443, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:26:41,799 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:43,758 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2022-04-06 20:26:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:26:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-04-06 20:26:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:43,759 INFO L225 Difference]: With dead ends: 110 [2022-04-06 20:26:43,759 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 20:26:43,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4541, Invalid=14365, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:26:43,761 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 3996 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 4085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:43,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 224 Invalid, 4085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3996 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:26:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 20:26:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-06 20:26:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-04-06 20:26:43,767 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2022-04-06 20:26:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:43,767 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-04-06 20:26:43,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-04-06 20:26:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:26:43,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:43,768 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:43,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 20:26:43,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 20:26:43,984 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:43,985 INFO L85 PathProgramCache]: Analyzing trace with hash -43032327, now seen corresponding path program 77 times [2022-04-06 20:26:43,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:43,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907791735] [2022-04-06 20:26:43,990 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:43,990 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:43,990 INFO L85 PathProgramCache]: Analyzing trace with hash -43032327, now seen corresponding path program 78 times [2022-04-06 20:26:43,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:43,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657597081] [2022-04-06 20:26:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:43,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:44,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:44,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657597081] [2022-04-06 20:26:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657597081] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130901076] [2022-04-06 20:26:44,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:26:44,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:44,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:44,866 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:44,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:26:44,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:26:44,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:26:44,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-04-06 20:26:45,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-04-06 20:26:45,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130901076] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:45,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:45,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 4, 8] total 56 [2022-04-06 20:26:45,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:45,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907791735] [2022-04-06 20:26:45,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907791735] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:45,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:45,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:26:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796338680] [2022-04-06 20:26:45,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:45,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:26:45,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:45,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:26:45,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2740, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:26:45,446 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:47,526 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2022-04-06 20:26:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:26:47,526 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-06 20:26:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:47,527 INFO L225 Difference]: With dead ends: 112 [2022-04-06 20:26:47,527 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 20:26:47,527 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=786, Invalid=9314, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:26:47,528 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 4177 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 4177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:47,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 229 Invalid, 4268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 4177 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:26:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 20:26:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-04-06 20:26:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-04-06 20:26:47,534 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2022-04-06 20:26:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:47,534 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-04-06 20:26:47,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-04-06 20:26:47,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 20:26:47,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:47,535 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:47,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:47,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 20:26:47,735 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash -757423530, now seen corresponding path program 79 times [2022-04-06 20:26:47,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:47,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1745766468] [2022-04-06 20:26:47,737 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:47,737 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash -757423530, now seen corresponding path program 80 times [2022-04-06 20:26:47,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:47,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266918531] [2022-04-06 20:26:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:47,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:48,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:48,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:48,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266918531] [2022-04-06 20:26:48,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266918531] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:48,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619729580] [2022-04-06 20:26:48,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:26:48,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:48,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:48,625 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:48,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:26:48,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:26:48,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:48,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:26:48,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:48,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:51,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619729580] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:51,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:51,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 98 [2022-04-06 20:26:51,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:51,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1745766468] [2022-04-06 20:26:51,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1745766468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:51,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:51,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:26:51,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332366445] [2022-04-06 20:26:51,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:51,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:26:51,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:51,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:26:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2495, Invalid=7011, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:26:51,986 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:54,113 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2022-04-06 20:26:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:26:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 20:26:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:54,114 INFO L225 Difference]: With dead ends: 114 [2022-04-06 20:26:54,114 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 20:26:54,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4931, Invalid=15661, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 20:26:54,118 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4338 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 4431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:54,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 214 Invalid, 4431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4338 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:26:54,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 20:26:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-04-06 20:26:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-04-06 20:26:54,129 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2022-04-06 20:26:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:54,129 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-04-06 20:26:54,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-04-06 20:26:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 20:26:54,129 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:54,129 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:54,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:54,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:54,339 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash -92602253, now seen corresponding path program 81 times [2022-04-06 20:26:54,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:54,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [771875567] [2022-04-06 20:26:54,341 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:54,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:54,341 INFO L85 PathProgramCache]: Analyzing trace with hash -92602253, now seen corresponding path program 82 times [2022-04-06 20:26:54,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:54,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574899631] [2022-04-06 20:26:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:54,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:55,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:55,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:55,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574899631] [2022-04-06 20:26:55,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574899631] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:55,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217515480] [2022-04-06 20:26:55,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:26:55,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:55,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:55,311 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:55,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:26:55,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:26:55,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 20:26:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:55,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217515480] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:59,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:59,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 50] total 99 [2022-04-06 20:26:59,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:59,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [771875567] [2022-04-06 20:26:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [771875567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:59,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:59,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:26:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194351052] [2022-04-06 20:26:59,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:59,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:26:59,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:26:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2547, Invalid=7155, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:26:59,952 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:02,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:02,102 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2022-04-06 20:27:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:27:02,102 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-04-06 20:27:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:02,103 INFO L225 Difference]: With dead ends: 116 [2022-04-06 20:27:02,103 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 20:27:02,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5083, Invalid=16087, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 20:27:02,105 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4359 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 4454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:02,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 79 Invalid, 4454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4359 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:27:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 20:27:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-04-06 20:27:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-04-06 20:27:02,121 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2022-04-06 20:27:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:02,121 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-04-06 20:27:02,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-04-06 20:27:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:27:02,121 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:02,122 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:02,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 20:27:02,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 20:27:02,322 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1149482160, now seen corresponding path program 83 times [2022-04-06 20:27:02,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:02,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698097705] [2022-04-06 20:27:02,323 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:02,324 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:02,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1149482160, now seen corresponding path program 84 times [2022-04-06 20:27:02,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:02,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726235099] [2022-04-06 20:27:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:02,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:03,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:03,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726235099] [2022-04-06 20:27:03,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726235099] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:03,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715979439] [2022-04-06 20:27:03,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:27:03,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:03,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:03,310 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:03,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:27:03,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:27:03,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:03,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:27:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 1 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-04-06 20:27:03,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 1 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-04-06 20:27:03,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715979439] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:03,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:03,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 4, 8] total 59 [2022-04-06 20:27:03,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:03,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698097705] [2022-04-06 20:27:03,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698097705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:03,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:03,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:27:03,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856792820] [2022-04-06 20:27:03,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:03,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:27:03,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:27:03,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=3061, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:27:03,930 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:06,238 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2022-04-06 20:27:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:27:06,238 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-04-06 20:27:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:06,239 INFO L225 Difference]: With dead ends: 118 [2022-04-06 20:27:06,239 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 20:27:06,240 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=837, Invalid=10505, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:27:06,240 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 4648 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 4745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 4648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:06,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 164 Invalid, 4745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 4648 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:27:06,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 20:27:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-04-06 20:27:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-04-06 20:27:06,247 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2022-04-06 20:27:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:06,247 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-04-06 20:27:06,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-04-06 20:27:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 20:27:06,248 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:06,248 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:06,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:06,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 20:27:06,452 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:06,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:06,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1096176365, now seen corresponding path program 85 times [2022-04-06 20:27:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:06,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [756976227] [2022-04-06 20:27:06,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:06,454 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:06,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1096176365, now seen corresponding path program 86 times [2022-04-06 20:27:06,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:06,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576324488] [2022-04-06 20:27:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:06,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:07,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:07,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:07,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576324488] [2022-04-06 20:27:07,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576324488] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:07,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971024592] [2022-04-06 20:27:07,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:27:07,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:07,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:07,467 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:07,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:27:07,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:27:07,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:07,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:27:07,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:07,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:11,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971024592] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:11,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:11,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 104 [2022-04-06 20:27:11,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:11,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [756976227] [2022-04-06 20:27:11,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [756976227] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:11,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:11,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:27:11,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486111849] [2022-04-06 20:27:11,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:11,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:27:11,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:11,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:27:11,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2804, Invalid=7908, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:27:11,265 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:13,631 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2022-04-06 20:27:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:27:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-04-06 20:27:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:13,632 INFO L225 Difference]: With dead ends: 120 [2022-04-06 20:27:13,632 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 20:27:13,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5546, Invalid=17710, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 20:27:13,633 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4815 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 4914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:13,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 144 Invalid, 4914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4815 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:27:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 20:27:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-04-06 20:27:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-04-06 20:27:13,640 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2022-04-06 20:27:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:13,640 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-04-06 20:27:13,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-04-06 20:27:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 20:27:13,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:13,641 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:13,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:13,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:13,858 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:13,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1194530998, now seen corresponding path program 87 times [2022-04-06 20:27:13,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:13,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350882760] [2022-04-06 20:27:13,859 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:13,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:13,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1194530998, now seen corresponding path program 88 times [2022-04-06 20:27:13,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:13,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827523928] [2022-04-06 20:27:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:13,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:14,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:14,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:14,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827523928] [2022-04-06 20:27:14,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827523928] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:14,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678537879] [2022-04-06 20:27:14,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:27:14,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:14,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:14,926 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:14,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:27:15,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:27:15,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:15,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 20:27:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:15,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:20,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678537879] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:20,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:20,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 105 [2022-04-06 20:27:20,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:20,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350882760] [2022-04-06 20:27:20,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350882760] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:20,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:20,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:27:20,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59445713] [2022-04-06 20:27:20,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:20,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:27:20,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:20,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:27:20,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2859, Invalid=8061, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:27:20,057 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:22,491 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2022-04-06 20:27:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:27:22,491 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-04-06 20:27:22,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:22,507 INFO L225 Difference]: With dead ends: 122 [2022-04-06 20:27:22,508 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 20:27:22,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5707, Invalid=18163, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 20:27:22,512 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 4914 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 5015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:22,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 64 Invalid, 5015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4914 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:27:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 20:27:22,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-04-06 20:27:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-04-06 20:27:22,519 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2022-04-06 20:27:22,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:22,519 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-04-06 20:27:22,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:22,520 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-04-06 20:27:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:27:22,520 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:22,520 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:22,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 20:27:22,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 20:27:22,735 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 753916007, now seen corresponding path program 89 times [2022-04-06 20:27:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:22,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95466317] [2022-04-06 20:27:22,737 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:22,737 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:22,737 INFO L85 PathProgramCache]: Analyzing trace with hash 753916007, now seen corresponding path program 90 times [2022-04-06 20:27:22,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:22,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259208014] [2022-04-06 20:27:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:22,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:23,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:23,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:23,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259208014] [2022-04-06 20:27:23,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259208014] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:23,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888150547] [2022-04-06 20:27:23,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:27:23,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:23,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:23,806 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:23,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:27:23,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:27:23,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:23,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:27:23,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 1 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:27:24,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 1 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:27:24,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888150547] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:24,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:24,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 4, 8] total 62 [2022-04-06 20:27:24,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:24,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95466317] [2022-04-06 20:27:24,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95466317] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:24,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:24,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:27:24,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071714640] [2022-04-06 20:27:24,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:24,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:27:24,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:24,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:27:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3400, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:27:24,424 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:27,038 INFO L93 Difference]: Finished difference Result 124 states and 127 transitions. [2022-04-06 20:27:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:27:27,038 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-04-06 20:27:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:27,039 INFO L225 Difference]: With dead ends: 124 [2022-04-06 20:27:27,039 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 20:27:27,039 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=888, Invalid=11768, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:27:27,040 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 5323 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 5426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 5323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:27,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 239 Invalid, 5426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 5323 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:27:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 20:27:27,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-04-06 20:27:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2022-04-06 20:27:27,046 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2022-04-06 20:27:27,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:27,047 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2022-04-06 20:27:27,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:27,047 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2022-04-06 20:27:27,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 20:27:27,047 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:27,047 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:27,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 20:27:27,249 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:27,250 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:27,250 INFO L85 PathProgramCache]: Analyzing trace with hash 605746756, now seen corresponding path program 91 times [2022-04-06 20:27:27,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:27,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813792960] [2022-04-06 20:27:27,252 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:27,252 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash 605746756, now seen corresponding path program 92 times [2022-04-06 20:27:27,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:27,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292066188] [2022-04-06 20:27:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:27,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:28,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:28,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:28,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292066188] [2022-04-06 20:27:28,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292066188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:28,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790223182] [2022-04-06 20:27:28,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:27:28,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:28,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:28,374 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:28,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:27:28,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:27:28,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:28,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 20:27:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:28,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:32,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790223182] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:32,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:32,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 110 [2022-04-06 20:27:32,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:32,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813792960] [2022-04-06 20:27:32,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813792960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:32,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:32,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:27:32,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611972330] [2022-04-06 20:27:32,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:32,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:27:32,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:27:32,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3131, Invalid=8859, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:27:32,474 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:35,101 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2022-04-06 20:27:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:27:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-04-06 20:27:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:35,102 INFO L225 Difference]: With dead ends: 126 [2022-04-06 20:27:35,102 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 20:27:35,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=6197, Invalid=19885, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 20:27:35,106 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 5529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:35,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 154 Invalid, 5529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 5424 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:27:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 20:27:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-04-06 20:27:35,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-04-06 20:27:35,114 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2022-04-06 20:27:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:35,114 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-04-06 20:27:35,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-04-06 20:27:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 20:27:35,115 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:35,115 INFO L499 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:35,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:35,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 20:27:35,332 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:35,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:35,332 INFO L85 PathProgramCache]: Analyzing trace with hash -50982687, now seen corresponding path program 93 times [2022-04-06 20:27:35,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:35,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1043514007] [2022-04-06 20:27:35,333 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:35,334 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:35,334 INFO L85 PathProgramCache]: Analyzing trace with hash -50982687, now seen corresponding path program 94 times [2022-04-06 20:27:35,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:35,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015524853] [2022-04-06 20:27:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:35,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:36,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:36,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015524853] [2022-04-06 20:27:36,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015524853] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831641102] [2022-04-06 20:27:36,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:27:36,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:36,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:36,502 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:36,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:27:36,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:27:36,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:36,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 20:27:36,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:36,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:42,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831641102] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:42,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:42,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 56] total 111 [2022-04-06 20:27:42,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:42,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1043514007] [2022-04-06 20:27:42,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1043514007] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:42,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:42,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:27:42,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119406903] [2022-04-06 20:27:42,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:42,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:27:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:27:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3189, Invalid=9021, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:27:42,289 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:45,004 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2022-04-06 20:27:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:27:45,005 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-04-06 20:27:45,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:45,005 INFO L225 Difference]: With dead ends: 128 [2022-04-06 20:27:45,005 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 20:27:45,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=6367, Invalid=20365, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 20:27:45,006 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 5661 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 5768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 5661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:45,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 179 Invalid, 5768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 5661 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:27:45,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 20:27:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-04-06 20:27:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-04-06 20:27:45,014 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2022-04-06 20:27:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:45,014 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-04-06 20:27:45,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-04-06 20:27:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:27:45,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:45,014 INFO L499 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:45,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 20:27:45,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 20:27:45,215 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash 192215102, now seen corresponding path program 95 times [2022-04-06 20:27:45,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:45,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [738702612] [2022-04-06 20:27:45,216 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:45,216 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:45,216 INFO L85 PathProgramCache]: Analyzing trace with hash 192215102, now seen corresponding path program 96 times [2022-04-06 20:27:45,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:45,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337420946] [2022-04-06 20:27:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:45,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:46,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:46,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:46,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337420946] [2022-04-06 20:27:46,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337420946] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:46,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59003620] [2022-04-06 20:27:46,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:27:46,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:46,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:46,450 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:46,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:27:46,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:27:46,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:27:46,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 1 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2022-04-06 20:27:46,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 1 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2022-04-06 20:27:47,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59003620] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:47,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:47,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 4, 8] total 65 [2022-04-06 20:27:47,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:47,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [738702612] [2022-04-06 20:27:47,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [738702612] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:47,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:47,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:27:47,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014177251] [2022-04-06 20:27:47,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:47,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:27:47,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:47,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:27:47,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=3757, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:27:47,141 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:50,004 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2022-04-06 20:27:50,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:27:50,004 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-04-06 20:27:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:50,005 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:27:50,005 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 20:27:50,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=939, Invalid=13103, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 20:27:50,006 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 5956 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 6065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 5956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:50,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 249 Invalid, 6065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 5956 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:27:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 20:27:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-04-06 20:27:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-04-06 20:27:50,017 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 119 [2022-04-06 20:27:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:50,017 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-04-06 20:27:50,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-04-06 20:27:50,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 20:27:50,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:50,017 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:50,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:50,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:50,218 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:50,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1977056347, now seen corresponding path program 97 times [2022-04-06 20:27:50,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:50,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [226866224] [2022-04-06 20:27:50,219 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:50,219 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1977056347, now seen corresponding path program 98 times [2022-04-06 20:27:50,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:50,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141805055] [2022-04-06 20:27:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:50,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:51,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:51,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141805055] [2022-04-06 20:27:51,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141805055] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734308304] [2022-04-06 20:27:51,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:27:51,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:51,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:51,443 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:51,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:27:51,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:27:51,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:51,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 113 conjunts are in the unsatisfiable core [2022-04-06 20:27:51,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:51,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:56,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734308304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:56,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:56,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 116 [2022-04-06 20:27:56,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:56,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [226866224] [2022-04-06 20:27:56,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [226866224] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:56,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:56,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:27:56,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374291576] [2022-04-06 20:27:56,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:56,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:27:56,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:27:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3476, Invalid=9864, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:27:56,042 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:59,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:59,063 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2022-04-06 20:27:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:27:59,063 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-04-06 20:27:59,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:59,064 INFO L225 Difference]: With dead ends: 132 [2022-04-06 20:27:59,064 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 20:27:59,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6884, Invalid=22186, Unknown=0, NotChecked=0, Total=29070 [2022-04-06 20:27:59,065 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 6165 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 6276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 6165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:59,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 244 Invalid, 6276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 6165 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:27:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 20:27:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-04-06 20:27:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-04-06 20:27:59,073 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 121 [2022-04-06 20:27:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:59,073 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-04-06 20:27:59,073 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-04-06 20:27:59,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 20:27:59,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:59,073 INFO L499 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:59,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:59,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:59,290 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:59,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:59,290 INFO L85 PathProgramCache]: Analyzing trace with hash -777425608, now seen corresponding path program 99 times [2022-04-06 20:27:59,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:59,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [379571696] [2022-04-06 20:27:59,291 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:59,291 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:59,291 INFO L85 PathProgramCache]: Analyzing trace with hash -777425608, now seen corresponding path program 100 times [2022-04-06 20:27:59,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:59,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990573199] [2022-04-06 20:27:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:59,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:00,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:00,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:00,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990573199] [2022-04-06 20:28:00,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990573199] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:00,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907407800] [2022-04-06 20:28:00,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:00,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:00,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:00,566 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:00,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:28:00,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:00,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:00,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 20:28:00,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:01,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:05,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907407800] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:05,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:05,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 118 [2022-04-06 20:28:05,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:05,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [379571696] [2022-04-06 20:28:05,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [379571696] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:05,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:05,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:28:05,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832029424] [2022-04-06 20:28:05,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:05,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:28:05,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:05,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:28:05,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3595, Invalid=10211, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:28:05,369 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:08,453 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2022-04-06 20:28:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:28:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-04-06 20:28:08,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:08,454 INFO L225 Difference]: With dead ends: 134 [2022-04-06 20:28:08,454 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 20:28:08,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=7121, Invalid=22981, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 20:28:08,456 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 6444 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 6557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 6444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:08,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 294 Invalid, 6557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 6444 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:28:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 20:28:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-04-06 20:28:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-04-06 20:28:08,463 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2022-04-06 20:28:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:08,463 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-04-06 20:28:08,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-04-06 20:28:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:28:08,464 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:08,464 INFO L499 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:08,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:08,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:08,677 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:08,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:08,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2134730027, now seen corresponding path program 101 times [2022-04-06 20:28:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:08,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113651627] [2022-04-06 20:28:08,678 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:08,678 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2134730027, now seen corresponding path program 102 times [2022-04-06 20:28:08,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:08,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311865121] [2022-04-06 20:28:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:08,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:09,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:09,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:09,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311865121] [2022-04-06 20:28:09,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311865121] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:09,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549014987] [2022-04-06 20:28:09,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:09,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:09,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:09,961 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:09,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:28:09,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:28:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:09,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:28:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 1 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-04-06 20:28:10,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 1 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-04-06 20:28:10,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549014987] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:10,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:10,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 4, 8] total 68 [2022-04-06 20:28:10,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:10,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113651627] [2022-04-06 20:28:10,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113651627] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:10,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:10,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:28:10,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62963722] [2022-04-06 20:28:10,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:10,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:28:10,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:10,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:28:10,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=4132, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:28:10,653 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:13,850 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2022-04-06 20:28:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:28:13,850 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-04-06 20:28:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:13,850 INFO L225 Difference]: With dead ends: 136 [2022-04-06 20:28:13,850 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 20:28:13,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=990, Invalid=14510, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:28:13,851 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 6553 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 6668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 6553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:13,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 199 Invalid, 6668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 6553 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:28:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 20:28:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-04-06 20:28:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-04-06 20:28:13,859 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2022-04-06 20:28:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:13,859 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-04-06 20:28:13,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-04-06 20:28:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 20:28:13,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:13,859 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:13,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 20:28:14,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 20:28:14,071 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:14,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash -834218702, now seen corresponding path program 103 times [2022-04-06 20:28:14,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:14,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [208771108] [2022-04-06 20:28:14,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:14,073 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:14,073 INFO L85 PathProgramCache]: Analyzing trace with hash -834218702, now seen corresponding path program 104 times [2022-04-06 20:28:14,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:14,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292359551] [2022-04-06 20:28:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:14,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:15,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:15,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:15,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292359551] [2022-04-06 20:28:15,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292359551] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:15,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501678320] [2022-04-06 20:28:15,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:15,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:15,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:15,399 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:15,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:28:15,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:15,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 118 conjunts are in the unsatisfiable core [2022-04-06 20:28:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:15,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:22,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501678320] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:22,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:22,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 61] total 121 [2022-04-06 20:28:22,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:22,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [208771108] [2022-04-06 20:28:22,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [208771108] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:22,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:22,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:28:22,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989384092] [2022-04-06 20:28:22,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:22,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:28:22,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:22,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:28:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3779, Invalid=10741, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:28:22,145 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:25,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:25,318 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2022-04-06 20:28:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:28:25,319 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-04-06 20:28:25,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:25,319 INFO L225 Difference]: With dead ends: 138 [2022-04-06 20:28:25,319 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 20:28:25,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=7547, Invalid=24315, Unknown=0, NotChecked=0, Total=31862 [2022-04-06 20:28:25,321 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6642 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 6759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 6642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:25,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 84 Invalid, 6759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 6642 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:28:25,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 20:28:25,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-04-06 20:28:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-04-06 20:28:25,328 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2022-04-06 20:28:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:25,328 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-04-06 20:28:25,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-04-06 20:28:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 20:28:25,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:25,329 INFO L499 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:25,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 20:28:25,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:28:25,539 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash -878318513, now seen corresponding path program 105 times [2022-04-06 20:28:25,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:25,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1077126340] [2022-04-06 20:28:25,541 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:25,541 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:25,541 INFO L85 PathProgramCache]: Analyzing trace with hash -878318513, now seen corresponding path program 106 times [2022-04-06 20:28:25,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:25,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969748781] [2022-04-06 20:28:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:25,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:26,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:26,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:26,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969748781] [2022-04-06 20:28:26,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969748781] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:26,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84002110] [2022-04-06 20:28:26,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:26,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:26,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:26,910 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:26,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:28:27,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:27,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:27,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 121 conjunts are in the unsatisfiable core [2022-04-06 20:28:27,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:27,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:32,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84002110] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:32,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:32,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 124 [2022-04-06 20:28:32,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:32,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1077126340] [2022-04-06 20:28:32,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1077126340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:32,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:32,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:28:32,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042488013] [2022-04-06 20:28:32,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:32,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:28:32,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:32,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:28:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3964, Invalid=11288, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:28:32,164 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:35,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:35,488 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2022-04-06 20:28:35,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:28:35,488 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-04-06 20:28:35,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:35,488 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:28:35,488 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 20:28:35,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=7856, Invalid=25450, Unknown=0, NotChecked=0, Total=33306 [2022-04-06 20:28:35,490 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 6909 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 7028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 6909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:35,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 114 Invalid, 7028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 6909 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:28:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 20:28:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-04-06 20:28:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-04-06 20:28:35,497 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2022-04-06 20:28:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:35,498 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-04-06 20:28:35,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-04-06 20:28:35,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 20:28:35,498 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:35,498 INFO L499 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:35,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 20:28:35,698 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:35,699 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:35,699 INFO L85 PathProgramCache]: Analyzing trace with hash -308563924, now seen corresponding path program 107 times [2022-04-06 20:28:35,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:35,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [392317243] [2022-04-06 20:28:35,700 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:35,700 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:35,700 INFO L85 PathProgramCache]: Analyzing trace with hash -308563924, now seen corresponding path program 108 times [2022-04-06 20:28:35,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:35,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258228300] [2022-04-06 20:28:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:35,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:37,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:37,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:37,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258228300] [2022-04-06 20:28:37,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258228300] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:37,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102465911] [2022-04-06 20:28:37,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:37,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:37,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:37,142 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:37,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:28:37,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:28:37,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:37,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:28:37,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 177 proven. 1 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2022-04-06 20:28:37,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 177 proven. 1 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2022-04-06 20:28:37,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102465911] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:37,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:37,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 4, 8] total 71 [2022-04-06 20:28:37,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:37,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [392317243] [2022-04-06 20:28:37,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [392317243] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:37,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:37,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:28:37,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387692895] [2022-04-06 20:28:37,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:37,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:28:37,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:37,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:28:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=4525, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:28:37,954 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:41,485 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2022-04-06 20:28:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:28:41,486 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-04-06 20:28:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:41,486 INFO L225 Difference]: With dead ends: 142 [2022-04-06 20:28:41,486 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 20:28:41,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1041, Invalid=15989, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 20:28:41,488 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7276 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 7397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 7276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:41,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 224 Invalid, 7397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 7276 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:28:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 20:28:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-04-06 20:28:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-04-06 20:28:41,495 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2022-04-06 20:28:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:41,495 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-04-06 20:28:41,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-04-06 20:28:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 20:28:41,496 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:41,496 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:41,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:41,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:41,700 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:41,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1764749513, now seen corresponding path program 109 times [2022-04-06 20:28:41,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:41,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1997453813] [2022-04-06 20:28:41,701 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:41,701 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:41,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1764749513, now seen corresponding path program 110 times [2022-04-06 20:28:41,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:41,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904073405] [2022-04-06 20:28:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:41,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:43,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:43,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:43,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904073405] [2022-04-06 20:28:43,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904073405] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:43,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963234913] [2022-04-06 20:28:43,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:43,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:43,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:43,149 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:43,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:28:43,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:43,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:43,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 124 conjunts are in the unsatisfiable core [2022-04-06 20:28:43,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:43,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:50,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963234913] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:50,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:50,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 64] total 127 [2022-04-06 20:28:50,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:50,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1997453813] [2022-04-06 20:28:50,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1997453813] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:50,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:50,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:28:50,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266244470] [2022-04-06 20:28:50,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:50,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:28:50,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:50,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:28:50,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4157, Invalid=11845, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:28:50,533 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:54,105 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2022-04-06 20:28:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:28:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-04-06 20:28:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:54,106 INFO L225 Difference]: With dead ends: 144 [2022-04-06 20:28:54,106 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 20:28:54,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=8303, Invalid=26853, Unknown=0, NotChecked=0, Total=35156 [2022-04-06 20:28:54,108 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 7539 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 7662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 7539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:54,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 244 Invalid, 7662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 7539 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:28:54,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 20:28:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-04-06 20:28:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-04-06 20:28:54,116 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 133 [2022-04-06 20:28:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:54,116 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-04-06 20:28:54,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-04-06 20:28:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 20:28:54,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:54,117 INFO L499 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:54,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:54,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:54,319 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1354137126, now seen corresponding path program 111 times [2022-04-06 20:28:54,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:54,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1250439768] [2022-04-06 20:28:54,320 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:54,320 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1354137126, now seen corresponding path program 112 times [2022-04-06 20:28:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:54,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270966111] [2022-04-06 20:28:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:55,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:55,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:55,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270966111] [2022-04-06 20:28:55,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270966111] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:55,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256843726] [2022-04-06 20:28:55,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:55,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:55,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:55,803 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:55,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:28:55,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:55,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:55,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 126 conjunts are in the unsatisfiable core [2022-04-06 20:28:55,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:56,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:03,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256843726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:03,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:03,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 65] total 129 [2022-04-06 20:29:03,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:03,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1250439768] [2022-04-06 20:29:03,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1250439768] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:03,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:03,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:29:03,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052982496] [2022-04-06 20:29:03,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:03,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:29:03,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:03,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:29:03,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4287, Invalid=12225, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 20:29:03,398 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:06,953 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2022-04-06 20:29:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:29:06,953 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-04-06 20:29:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:06,954 INFO L225 Difference]: With dead ends: 146 [2022-04-06 20:29:06,954 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 20:29:06,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=8563, Invalid=27727, Unknown=0, NotChecked=0, Total=36290 [2022-04-06 20:29:06,956 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7542 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 7542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:06,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 44 Invalid, 7667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 7542 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:29:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 20:29:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-04-06 20:29:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-04-06 20:29:06,963 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2022-04-06 20:29:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:06,964 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-04-06 20:29:06,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:06,964 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-04-06 20:29:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 20:29:06,964 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:06,964 INFO L499 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:06,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 20:29:07,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:07,165 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:07,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1892624451, now seen corresponding path program 113 times [2022-04-06 20:29:07,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:07,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2032120183] [2022-04-06 20:29:07,166 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:07,166 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1892624451, now seen corresponding path program 114 times [2022-04-06 20:29:07,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:07,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952563269] [2022-04-06 20:29:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:07,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:08,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:08,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:08,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952563269] [2022-04-06 20:29:08,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952563269] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:08,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113087852] [2022-04-06 20:29:08,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:08,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:08,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:08,698 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:08,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:29:08,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:29:08,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:08,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:29:08,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 186 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2022-04-06 20:29:09,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 186 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2022-04-06 20:29:09,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113087852] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:09,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:09,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 4, 8] total 74 [2022-04-06 20:29:09,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:09,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2032120183] [2022-04-06 20:29:09,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2032120183] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:09,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:09,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:29:09,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409867116] [2022-04-06 20:29:09,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:09,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:29:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:29:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=4936, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:29:09,467 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:13,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:13,182 INFO L93 Difference]: Finished difference Result 148 states and 151 transitions. [2022-04-06 20:29:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:29:13,183 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-04-06 20:29:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:13,183 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:29:13,183 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:29:13,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1092, Invalid=17540, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:29:13,185 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7771 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 7898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 7771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:13,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 29 Invalid, 7898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 7771 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:29:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:29:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-04-06 20:29:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2022-04-06 20:29:13,193 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2022-04-06 20:29:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:13,193 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2022-04-06 20:29:13,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2022-04-06 20:29:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 20:29:13,193 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:13,193 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:13,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:13,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 20:29:13,394 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash -312099040, now seen corresponding path program 115 times [2022-04-06 20:29:13,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:13,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [359748183] [2022-04-06 20:29:13,395 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:13,395 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:13,395 INFO L85 PathProgramCache]: Analyzing trace with hash -312099040, now seen corresponding path program 116 times [2022-04-06 20:29:13,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:13,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613623343] [2022-04-06 20:29:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:13,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:14,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:14,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:14,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613623343] [2022-04-06 20:29:14,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613623343] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:14,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538887890] [2022-04-06 20:29:14,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:14,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:14,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:14,980 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:14,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:29:15,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:15,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:15,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 131 conjunts are in the unsatisfiable core [2022-04-06 20:29:15,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:15,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:20,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538887890] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:20,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:20,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 134 [2022-04-06 20:29:20,947 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:20,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [359748183] [2022-04-06 20:29:20,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [359748183] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:20,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:20,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:29:20,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238281776] [2022-04-06 20:29:20,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:20,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:29:20,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:29:20,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4619, Invalid=13203, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 20:29:20,949 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:24,769 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2022-04-06 20:29:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:29:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-04-06 20:29:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:24,770 INFO L225 Difference]: With dead ends: 150 [2022-04-06 20:29:24,770 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 20:29:24,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=9161, Invalid=29845, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 20:29:24,772 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8058 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 8058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:24,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 59 Invalid, 8187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 8058 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:29:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 20:29:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-04-06 20:29:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-04-06 20:29:24,780 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 139 [2022-04-06 20:29:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:24,780 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-04-06 20:29:24,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-04-06 20:29:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 20:29:24,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:24,781 INFO L499 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:24,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:24,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:24,981 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:24,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1632496963, now seen corresponding path program 117 times [2022-04-06 20:29:24,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:24,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [864118235] [2022-04-06 20:29:24,982 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:24,983 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1632496963, now seen corresponding path program 118 times [2022-04-06 20:29:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:24,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083916013] [2022-04-06 20:29:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:24,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:26,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:26,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:26,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083916013] [2022-04-06 20:29:26,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083916013] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:26,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508526890] [2022-04-06 20:29:26,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:26,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:26,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:26,624 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:26,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:29:26,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:26,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:26,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 132 conjunts are in the unsatisfiable core [2022-04-06 20:29:26,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:27,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:34,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508526890] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:34,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:34,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 68] total 135 [2022-04-06 20:29:34,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:34,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [864118235] [2022-04-06 20:29:34,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [864118235] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:34,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:34,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:29:34,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723676733] [2022-04-06 20:29:34,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:34,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:29:34,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:34,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:29:34,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4689, Invalid=13401, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:29:34,958 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:38,876 INFO L93 Difference]: Finished difference Result 152 states and 155 transitions. [2022-04-06 20:29:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:29:38,877 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-04-06 20:29:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:38,877 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:29:38,877 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 20:29:38,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=9367, Invalid=30433, Unknown=0, NotChecked=0, Total=39800 [2022-04-06 20:29:38,880 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8313 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 8313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:38,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 59 Invalid, 8444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 8313 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:29:38,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 20:29:38,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-04-06 20:29:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2022-04-06 20:29:38,894 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2022-04-06 20:29:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:38,894 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2022-04-06 20:29:38,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2022-04-06 20:29:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:29:38,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:38,895 INFO L499 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:38,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:39,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 20:29:39,095 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash 775418650, now seen corresponding path program 119 times [2022-04-06 20:29:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:39,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [985122926] [2022-04-06 20:29:39,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:39,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:39,097 INFO L85 PathProgramCache]: Analyzing trace with hash 775418650, now seen corresponding path program 120 times [2022-04-06 20:29:39,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:39,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630815981] [2022-04-06 20:29:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:39,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:40,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:40,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:40,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630815981] [2022-04-06 20:29:40,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630815981] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:40,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295501071] [2022-04-06 20:29:40,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:40,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:40,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:40,768 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:40,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:29:40,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:29:40,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:40,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:29:40,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 195 proven. 1 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2022-04-06 20:29:41,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 195 proven. 1 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2022-04-06 20:29:41,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295501071] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:41,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:41,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 4, 8] total 77 [2022-04-06 20:29:41,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:41,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [985122926] [2022-04-06 20:29:41,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [985122926] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:41,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:41,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:29:41,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39759005] [2022-04-06 20:29:41,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:41,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:29:41,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:41,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:29:41,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=5365, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:29:41,558 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:45,662 INFO L93 Difference]: Finished difference Result 154 states and 157 transitions. [2022-04-06 20:29:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:29:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-04-06 20:29:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:45,663 INFO L225 Difference]: With dead ends: 154 [2022-04-06 20:29:45,663 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 20:29:45,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1143, Invalid=19163, Unknown=0, NotChecked=0, Total=20306 [2022-04-06 20:29:45,664 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 8740 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 8873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 8740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:45,664 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 199 Invalid, 8873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 8740 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:29:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 20:29:45,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-04-06 20:29:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2022-04-06 20:29:45,672 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2022-04-06 20:29:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:45,672 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2022-04-06 20:29:45,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2022-04-06 20:29:45,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 20:29:45,673 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:45,673 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:45,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:45,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 20:29:45,883 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:45,884 INFO L85 PathProgramCache]: Analyzing trace with hash -205049801, now seen corresponding path program 121 times [2022-04-06 20:29:45,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:45,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668536502] [2022-04-06 20:29:45,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:45,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:45,885 INFO L85 PathProgramCache]: Analyzing trace with hash -205049801, now seen corresponding path program 122 times [2022-04-06 20:29:45,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:45,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677261825] [2022-04-06 20:29:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:45,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:47,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:47,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:47,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677261825] [2022-04-06 20:29:47,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677261825] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:47,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762183611] [2022-04-06 20:29:47,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:47,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:47,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:47,596 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:47,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:29:47,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:47,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:47,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 136 conjunts are in the unsatisfiable core [2022-04-06 20:29:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:48,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:56,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762183611] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:56,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:56,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 70] total 139 [2022-04-06 20:29:56,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:56,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668536502] [2022-04-06 20:29:56,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668536502] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:56,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:56,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:29:56,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298982286] [2022-04-06 20:29:56,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:56,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:29:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:56,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:29:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4967, Invalid=14215, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:29:56,487 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:00,691 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2022-04-06 20:30:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:30:00,691 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-04-06 20:30:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:00,692 INFO L225 Difference]: With dead ends: 156 [2022-04-06 20:30:00,692 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 20:30:00,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2417 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=9923, Invalid=32307, Unknown=0, NotChecked=0, Total=42230 [2022-04-06 20:30:00,693 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9051 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 9186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 9051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:00,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 239 Invalid, 9186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 9051 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:30:00,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 20:30:00,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-04-06 20:30:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-04-06 20:30:00,702 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2022-04-06 20:30:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:00,702 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-04-06 20:30:00,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-04-06 20:30:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 20:30:00,702 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:00,703 INFO L499 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:00,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:00,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:30:00,923 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:00,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:00,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1837393388, now seen corresponding path program 123 times [2022-04-06 20:30:00,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:00,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1847820375] [2022-04-06 20:30:00,925 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:00,925 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1837393388, now seen corresponding path program 124 times [2022-04-06 20:30:00,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:00,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865453417] [2022-04-06 20:30:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:02,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:02,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:02,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865453417] [2022-04-06 20:30:02,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865453417] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:02,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066485093] [2022-04-06 20:30:02,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:02,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:02,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:02,710 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:02,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:30:02,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:02,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:02,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 139 conjunts are in the unsatisfiable core [2022-04-06 20:30:02,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:03,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:09,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066485093] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:09,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:09,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 142 [2022-04-06 20:30:09,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1847820375] [2022-04-06 20:30:09,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1847820375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:09,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:09,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:30:09,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133190169] [2022-04-06 20:30:09,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:09,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:30:09,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:09,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:30:09,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5179, Invalid=14843, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:30:09,668 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:14,069 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2022-04-06 20:30:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:30:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-04-06 20:30:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:14,072 INFO L225 Difference]: With dead ends: 158 [2022-04-06 20:30:14,072 INFO L226 Difference]: Without dead ends: 150 [2022-04-06 20:30:14,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2422 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=10277, Invalid=33613, Unknown=0, NotChecked=0, Total=43890 [2022-04-06 20:30:14,075 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 9348 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 9485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 9348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:14,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 264 Invalid, 9485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 9348 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:30:14,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-04-06 20:30:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-04-06 20:30:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2022-04-06 20:30:14,096 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2022-04-06 20:30:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:14,096 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2022-04-06 20:30:14,097 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2022-04-06 20:30:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 20:30:14,097 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:14,097 INFO L499 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:14,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:14,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:30:14,311 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1438449841, now seen corresponding path program 125 times [2022-04-06 20:30:14,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:14,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806139431] [2022-04-06 20:30:14,312 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:14,313 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1438449841, now seen corresponding path program 126 times [2022-04-06 20:30:14,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:14,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545553114] [2022-04-06 20:30:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:14,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:16,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545553114] [2022-04-06 20:30:16,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545553114] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758063742] [2022-04-06 20:30:16,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:30:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:16,112 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:16,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:30:16,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:30:16,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:16,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:30:16,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 204 proven. 1 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2022-04-06 20:30:16,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 204 proven. 1 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2022-04-06 20:30:16,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758063742] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:16,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:16,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 4, 8] total 80 [2022-04-06 20:30:16,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:16,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806139431] [2022-04-06 20:30:16,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806139431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:16,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:16,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:30:16,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55573050] [2022-04-06 20:30:16,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:16,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:30:16,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:30:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=5812, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:30:16,923 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:21,417 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2022-04-06 20:30:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:30:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-04-06 20:30:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:21,418 INFO L225 Difference]: With dead ends: 160 [2022-04-06 20:30:21,418 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 20:30:21,419 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1194, Invalid=20858, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 20:30:21,419 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 9649 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 9788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 9649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:21,419 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 289 Invalid, 9788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 9649 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:30:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 20:30:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-04-06 20:30:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-04-06 20:30:21,427 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 149 [2022-04-06 20:30:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:21,427 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-04-06 20:30:21,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-04-06 20:30:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 20:30:21,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:21,428 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:21,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:21,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:21,642 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:21,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1312764942, now seen corresponding path program 127 times [2022-04-06 20:30:21,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:21,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [621508363] [2022-04-06 20:30:21,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:21,644 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1312764942, now seen corresponding path program 128 times [2022-04-06 20:30:21,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:21,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998611345] [2022-04-06 20:30:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:21,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:23,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:23,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:23,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998611345] [2022-04-06 20:30:23,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998611345] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:23,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656610420] [2022-04-06 20:30:23,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:23,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:23,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:23,537 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:23,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:30:23,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:23,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 143 conjunts are in the unsatisfiable core [2022-04-06 20:30:23,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:24,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:30,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656610420] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:30,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:30,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 146 [2022-04-06 20:30:30,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:30,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [621508363] [2022-04-06 20:30:30,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [621508363] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:30,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:30,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:30:30,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625500167] [2022-04-06 20:30:30,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:30,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:30:30,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:30,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:30:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5471, Invalid=15699, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 20:30:30,602 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:35,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:35,170 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2022-04-06 20:30:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:30:35,170 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-04-06 20:30:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:35,171 INFO L225 Difference]: With dead ends: 162 [2022-04-06 20:30:35,171 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 20:30:35,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2563 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=10859, Invalid=35581, Unknown=0, NotChecked=0, Total=46440 [2022-04-06 20:30:35,173 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 9864 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 10005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 9864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:35,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 239 Invalid, 10005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 9864 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:30:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 20:30:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-04-06 20:30:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-04-06 20:30:35,181 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 151 [2022-04-06 20:30:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:35,181 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-04-06 20:30:35,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-04-06 20:30:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 20:30:35,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:35,182 INFO L499 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:35,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:35,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:35,382 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:35,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:35,383 INFO L85 PathProgramCache]: Analyzing trace with hash 788661291, now seen corresponding path program 129 times [2022-04-06 20:30:35,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:35,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [494860280] [2022-04-06 20:30:35,384 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:35,384 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:35,384 INFO L85 PathProgramCache]: Analyzing trace with hash 788661291, now seen corresponding path program 130 times [2022-04-06 20:30:35,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:35,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584556900] [2022-04-06 20:30:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:35,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:37,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:37,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:37,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584556900] [2022-04-06 20:30:37,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584556900] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:37,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769031867] [2022-04-06 20:30:37,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:37,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:37,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:37,335 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:37,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:30:37,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:37,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:37,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 145 conjunts are in the unsatisfiable core [2022-04-06 20:30:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:37,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:44,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769031867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:44,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:44,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 148 [2022-04-06 20:30:44,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [494860280] [2022-04-06 20:30:44,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [494860280] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:44,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:44,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:30:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973152711] [2022-04-06 20:30:44,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:44,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:30:44,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:44,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:30:44,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5620, Invalid=16136, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:30:44,611 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:49,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:49,329 INFO L93 Difference]: Finished difference Result 164 states and 167 transitions. [2022-04-06 20:30:49,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:30:49,329 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-04-06 20:30:49,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:49,330 INFO L225 Difference]: With dead ends: 164 [2022-04-06 20:30:49,330 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 20:30:49,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2635 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=11156, Invalid=36586, Unknown=0, NotChecked=0, Total=47742 [2022-04-06 20:30:49,332 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 10191 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 10334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 10191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:49,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 279 Invalid, 10334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 10191 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 20:30:49,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 20:30:49,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-04-06 20:30:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-04-06 20:30:49,340 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2022-04-06 20:30:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:49,340 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-04-06 20:30:49,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-04-06 20:30:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 20:30:49,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:49,341 INFO L499 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:49,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 20:30:49,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:49,543 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:49,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash -363773688, now seen corresponding path program 131 times [2022-04-06 20:30:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:49,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [921153175] [2022-04-06 20:30:49,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:49,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:49,545 INFO L85 PathProgramCache]: Analyzing trace with hash -363773688, now seen corresponding path program 132 times [2022-04-06 20:30:49,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:49,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494847502] [2022-04-06 20:30:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:49,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:51,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:51,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:51,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494847502] [2022-04-06 20:30:51,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494847502] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:51,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920825754] [2022-04-06 20:30:51,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:30:51,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:51,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:51,503 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:51,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:30:51,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:30:51,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:51,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:30:51,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 213 proven. 1 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2022-04-06 20:30:51,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 213 proven. 1 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2022-04-06 20:30:52,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920825754] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:52,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:52,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 4, 8] total 83 [2022-04-06 20:30:52,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:52,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [921153175] [2022-04-06 20:30:52,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [921153175] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:52,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:52,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:30:52,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810106070] [2022-04-06 20:30:52,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:52,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:30:52,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:52,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:30:52,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=6277, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:30:52,400 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:57,191 INFO L93 Difference]: Finished difference Result 166 states and 169 transitions. [2022-04-06 20:30:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:30:57,191 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-04-06 20:30:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:57,192 INFO L225 Difference]: With dead ends: 166 [2022-04-06 20:30:57,192 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 20:30:57,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1245, Invalid=22625, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 20:30:57,194 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 10282 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 10427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 10282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:57,194 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 119 Invalid, 10427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 10282 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 20:30:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 20:30:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-04-06 20:30:57,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:57,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2022-04-06 20:30:57,208 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 155 [2022-04-06 20:30:57,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:57,208 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2022-04-06 20:30:57,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2022-04-06 20:30:57,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 20:30:57,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:57,208 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:57,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:57,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 20:30:57,409 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:57,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:57,409 INFO L85 PathProgramCache]: Analyzing trace with hash 247773861, now seen corresponding path program 133 times [2022-04-06 20:30:57,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:57,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1913636933] [2022-04-06 20:30:57,410 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:57,410 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash 247773861, now seen corresponding path program 134 times [2022-04-06 20:30:57,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:57,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058451680] [2022-04-06 20:30:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:57,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:59,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:59,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:59,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058451680] [2022-04-06 20:30:59,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058451680] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:59,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924686531] [2022-04-06 20:30:59,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:59,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:59,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:59,402 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:59,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:30:59,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:59,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:59,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 149 conjunts are in the unsatisfiable core [2022-04-06 20:30:59,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:59,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:07,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924686531] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:07,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:07,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 152 [2022-04-06 20:31:07,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:07,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1913636933] [2022-04-06 20:31:07,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1913636933] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:07,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:07,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:31:07,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952794479] [2022-04-06 20:31:07,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:07,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:31:07,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:07,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:31:07,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5924, Invalid=17028, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 20:31:07,043 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:12,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:12,031 INFO L93 Difference]: Finished difference Result 168 states and 171 transitions. [2022-04-06 20:31:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:31:12,031 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-04-06 20:31:12,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:12,032 INFO L225 Difference]: With dead ends: 168 [2022-04-06 20:31:12,032 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 20:31:12,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2782 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=11762, Invalid=38638, Unknown=0, NotChecked=0, Total=50400 [2022-04-06 20:31:12,034 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 10653 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 10800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 10653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:12,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 189 Invalid, 10800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 10653 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:31:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 20:31:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-04-06 20:31:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-04-06 20:31:12,043 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 157 [2022-04-06 20:31:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:12,043 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-04-06 20:31:12,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:12,043 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-04-06 20:31:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 20:31:12,044 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:12,044 INFO L499 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:12,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:12,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:12,259 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash -465551102, now seen corresponding path program 135 times [2022-04-06 20:31:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:12,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [275083989] [2022-04-06 20:31:12,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:12,261 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash -465551102, now seen corresponding path program 136 times [2022-04-06 20:31:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:12,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967240500] [2022-04-06 20:31:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:12,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:14,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:14,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967240500] [2022-04-06 20:31:14,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967240500] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:14,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697143448] [2022-04-06 20:31:14,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:31:14,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:14,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:14,299 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:14,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:31:14,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:31:14,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:14,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 151 conjunts are in the unsatisfiable core [2022-04-06 20:31:14,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:14,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:22,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697143448] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:22,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:22,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 154 [2022-04-06 20:31:22,169 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:22,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [275083989] [2022-04-06 20:31:22,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [275083989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:22,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:22,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:31:22,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341493219] [2022-04-06 20:31:22,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:22,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:31:22,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:31:22,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6079, Invalid=17483, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 20:31:22,171 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:27,241 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-04-06 20:31:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:31:27,241 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-04-06 20:31:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:27,242 INFO L225 Difference]: With dead ends: 170 [2022-04-06 20:31:27,242 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 20:31:27,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2857 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=12071, Invalid=39685, Unknown=0, NotChecked=0, Total=51756 [2022-04-06 20:31:27,244 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 10854 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 11003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 10854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:27,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 114 Invalid, 11003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 10854 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:31:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 20:31:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-04-06 20:31:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2022-04-06 20:31:27,253 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2022-04-06 20:31:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:27,253 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2022-04-06 20:31:27,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2022-04-06 20:31:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 20:31:27,254 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:27,254 INFO L499 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:27,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 20:31:27,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:27,467 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1223926815, now seen corresponding path program 137 times [2022-04-06 20:31:27,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:27,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1620120265] [2022-04-06 20:31:27,469 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:27,469 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1223926815, now seen corresponding path program 138 times [2022-04-06 20:31:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:27,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209020599] [2022-04-06 20:31:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:29,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:29,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:29,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209020599] [2022-04-06 20:31:29,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209020599] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:29,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850217371] [2022-04-06 20:31:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:31:29,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:29,572 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:29,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:31:29,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:31:29,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:29,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:31:29,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 222 proven. 1 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2022-04-06 20:31:29,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 222 proven. 1 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2022-04-06 20:31:30,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850217371] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:30,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:30,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 4, 8] total 86 [2022-04-06 20:31:30,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:30,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1620120265] [2022-04-06 20:31:30,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1620120265] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:30,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:30,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:31:30,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739996162] [2022-04-06 20:31:30,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:30,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:31:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:31:30,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=6760, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:31:30,461 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:35,724 INFO L93 Difference]: Finished difference Result 172 states and 175 transitions. [2022-04-06 20:31:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:31:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-04-06 20:31:35,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:35,731 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:31:35,731 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 20:31:35,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1296, Invalid=24464, Unknown=0, NotChecked=0, Total=25760 [2022-04-06 20:31:35,732 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 11413 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 11564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 11413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:35,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 334 Invalid, 11564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 11413 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 20:31:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 20:31:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-04-06 20:31:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2022-04-06 20:31:35,741 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2022-04-06 20:31:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:35,741 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2022-04-06 20:31:35,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2022-04-06 20:31:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 20:31:35,742 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:35,742 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:35,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:35,953 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 20:31:35,954 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1314567164, now seen corresponding path program 139 times [2022-04-06 20:31:35,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:35,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063514116] [2022-04-06 20:31:35,955 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:35,955 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1314567164, now seen corresponding path program 140 times [2022-04-06 20:31:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:35,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389432019] [2022-04-06 20:31:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:35,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:38,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:38,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389432019] [2022-04-06 20:31:38,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389432019] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:38,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529300882] [2022-04-06 20:31:38,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:31:38,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:38,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:38,100 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:38,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:31:38,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:31:38,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:38,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 154 conjunts are in the unsatisfiable core [2022-04-06 20:31:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:38,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:49,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529300882] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:49,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:49,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 79] total 157 [2022-04-06 20:31:49,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:49,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063514116] [2022-04-06 20:31:49,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063514116] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:49,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:49,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:31:49,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425242602] [2022-04-06 20:31:49,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:49,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:31:49,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:31:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6317, Invalid=18175, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:31:49,361 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:54,828 INFO L93 Difference]: Finished difference Result 174 states and 177 transitions. [2022-04-06 20:31:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:31:54,828 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-04-06 20:31:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:54,829 INFO L225 Difference]: With dead ends: 174 [2022-04-06 20:31:54,829 INFO L226 Difference]: Without dead ends: 166 [2022-04-06 20:31:54,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 249 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=12623, Invalid=41433, Unknown=0, NotChecked=0, Total=54056 [2022-04-06 20:31:54,831 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 11664 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 11817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 11664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:54,831 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 294 Invalid, 11817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 11664 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:31:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-04-06 20:31:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-04-06 20:31:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-04-06 20:31:54,841 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2022-04-06 20:31:54,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:54,841 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-04-06 20:31:54,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-04-06 20:31:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 20:31:54,842 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:54,842 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:54,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 20:31:55,042 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 20:31:55,042 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:55,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1774370663, now seen corresponding path program 141 times [2022-04-06 20:31:55,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:55,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1523616319] [2022-04-06 20:31:55,044 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:55,044 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:55,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1774370663, now seen corresponding path program 142 times [2022-04-06 20:31:55,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:55,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582505222] [2022-04-06 20:31:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:55,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:57,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:57,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:57,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582505222] [2022-04-06 20:31:57,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582505222] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:57,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80107743] [2022-04-06 20:31:57,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:31:57,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:57,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:57,247 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:57,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:31:57,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:31:57,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 157 conjunts are in the unsatisfiable core [2022-04-06 20:31:57,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:57,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:05,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80107743] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:05,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:05,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 160 [2022-04-06 20:32:05,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:05,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1523616319] [2022-04-06 20:32:05,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1523616319] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:05,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:05,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 20:32:05,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849159627] [2022-04-06 20:32:05,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:05,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 20:32:05,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:05,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 20:32:05,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6556, Invalid=18884, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:32:05,746 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:11,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:11,403 INFO L93 Difference]: Finished difference Result 176 states and 179 transitions. [2022-04-06 20:32:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:32:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-04-06 20:32:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:11,404 INFO L225 Difference]: With dead ends: 176 [2022-04-06 20:32:11,405 INFO L226 Difference]: Without dead ends: 168 [2022-04-06 20:32:11,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 251 SyntacticMatches, 2 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3088 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=13022, Invalid=42910, Unknown=0, NotChecked=0, Total=55932 [2022-04-06 20:32:11,407 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 11967 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 12122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 11967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:11,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 294 Invalid, 12122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 11967 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 20:32:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-06 20:32:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-04-06 20:32:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2022-04-06 20:32:11,416 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2022-04-06 20:32:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:11,416 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2022-04-06 20:32:11,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2022-04-06 20:32:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 20:32:11,416 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:11,417 INFO L499 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:11,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-06 20:32:11,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:11,622 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:11,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:11,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1873746422, now seen corresponding path program 143 times [2022-04-06 20:32:11,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:11,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1038842482] [2022-04-06 20:32:11,624 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:11,624 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1873746422, now seen corresponding path program 144 times [2022-04-06 20:32:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:11,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640501919] [2022-04-06 20:32:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:11,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:13,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:13,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:13,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640501919] [2022-04-06 20:32:13,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640501919] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:13,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058237238] [2022-04-06 20:32:13,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:13,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:13,875 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:13,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:32:13,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:32:13,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:13,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:32:13,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 231 proven. 1 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2022-04-06 20:32:14,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 231 proven. 1 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2022-04-06 20:32:14,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058237238] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:14,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:14,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 4, 8] total 89 [2022-04-06 20:32:14,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:14,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1038842482] [2022-04-06 20:32:14,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1038842482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:14,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:14,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 20:32:14,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006449784] [2022-04-06 20:32:14,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:14,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 20:32:14,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:14,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 20:32:14,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=7261, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:32:14,827 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:20,543 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2022-04-06 20:32:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:32:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-04-06 20:32:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:20,544 INFO L225 Difference]: With dead ends: 178 [2022-04-06 20:32:20,544 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 20:32:20,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1347, Invalid=26375, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 20:32:20,546 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 12172 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 12329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 12172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:20,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 209 Invalid, 12329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 12172 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 20:32:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 20:32:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-04-06 20:32:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2022-04-06 20:32:20,555 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 167 [2022-04-06 20:32:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:20,555 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2022-04-06 20:32:20,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2022-04-06 20:32:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 20:32:20,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:20,556 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:20,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:20,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:20,760 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1274015725, now seen corresponding path program 145 times [2022-04-06 20:32:20,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:20,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [663778980] [2022-04-06 20:32:20,761 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:20,761 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:20,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1274015725, now seen corresponding path program 146 times [2022-04-06 20:32:20,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:20,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338015094] [2022-04-06 20:32:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:20,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:23,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:23,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:23,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338015094] [2022-04-06 20:32:23,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338015094] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:23,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447937804] [2022-04-06 20:32:23,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:23,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:23,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:23,211 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:23,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:32:23,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:23,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:23,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 161 conjunts are in the unsatisfiable core [2022-04-06 20:32:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:23,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:32,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447937804] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:32,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:32,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 164 [2022-04-06 20:32:32,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:32,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [663778980] [2022-04-06 20:32:32,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [663778980] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:32,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:32,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 20:32:32,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498077649] [2022-04-06 20:32:32,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:32,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 20:32:32,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:32,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 20:32:32,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6884, Invalid=19848, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 20:32:32,164 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:38,017 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2022-04-06 20:32:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:32:38,017 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-04-06 20:32:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:38,018 INFO L225 Difference]: With dead ends: 180 [2022-04-06 20:32:38,018 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 20:32:38,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=13676, Invalid=45130, Unknown=0, NotChecked=0, Total=58806 [2022-04-06 20:32:38,020 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 12471 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 12630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 12471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:38,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 199 Invalid, 12630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 12471 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:32:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 20:32:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-04-06 20:32:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-04-06 20:32:38,029 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 169 [2022-04-06 20:32:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:38,030 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-04-06 20:32:38,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-04-06 20:32:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 20:32:38,030 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:38,030 INFO L499 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:38,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:38,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:38,247 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:38,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:38,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1678504688, now seen corresponding path program 147 times [2022-04-06 20:32:38,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:38,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1689029386] [2022-04-06 20:32:38,248 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:38,249 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1678504688, now seen corresponding path program 148 times [2022-04-06 20:32:38,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:38,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865456499] [2022-04-06 20:32:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:38,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:40,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:40,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:40,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865456499] [2022-04-06 20:32:40,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865456499] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:40,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625944887] [2022-04-06 20:32:40,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:40,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:40,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:40,608 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:40,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:32:40,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:40,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 162 conjunts are in the unsatisfiable core [2022-04-06 20:32:40,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:41,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:53,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625944887] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:53,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:53,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 83] total 165 [2022-04-06 20:32:53,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:53,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1689029386] [2022-04-06 20:32:53,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1689029386] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:53,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:53,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 20:32:53,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502148083] [2022-04-06 20:32:53,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:53,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 20:32:53,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:53,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 20:32:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6969, Invalid=20091, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 20:32:53,122 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:59,086 INFO L93 Difference]: Finished difference Result 182 states and 185 transitions. [2022-04-06 20:32:59,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 20:32:59,086 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-04-06 20:32:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:59,087 INFO L225 Difference]: With dead ends: 182 [2022-04-06 20:32:59,087 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 20:32:59,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 261 SyntacticMatches, 2 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3405 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=13927, Invalid=45853, Unknown=0, NotChecked=0, Total=59780 [2022-04-06 20:32:59,090 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 12594 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 12755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 12594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:59,090 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 39 Invalid, 12755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 12594 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:32:59,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 20:32:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-04-06 20:32:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2022-04-06 20:32:59,099 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2022-04-06 20:32:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:59,099 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2022-04-06 20:32:59,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2022-04-06 20:32:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:32:59,100 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:59,100 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:59,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:59,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:59,316 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash 77238925, now seen corresponding path program 149 times [2022-04-06 20:32:59,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:59,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1933704584] [2022-04-06 20:32:59,318 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:59,318 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:59,318 INFO L85 PathProgramCache]: Analyzing trace with hash 77238925, now seen corresponding path program 150 times [2022-04-06 20:32:59,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:59,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333156036] [2022-04-06 20:32:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:59,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:01,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:01,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333156036] [2022-04-06 20:33:01,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333156036] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606719101] [2022-04-06 20:33:01,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:01,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:01,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:01,764 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:01,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:33:01,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:33:01,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:01,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:33:01,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 240 proven. 1 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2022-04-06 20:33:02,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 240 proven. 1 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2022-04-06 20:33:02,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606719101] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:02,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:02,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 4, 8] total 92 [2022-04-06 20:33:02,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1933704584] [2022-04-06 20:33:02,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1933704584] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:02,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:02,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 20:33:02,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886774725] [2022-04-06 20:33:02,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:02,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 20:33:02,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:02,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 20:33:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=7780, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:33:02,696 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:08,852 INFO L93 Difference]: Finished difference Result 184 states and 187 transitions. [2022-04-06 20:33:08,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 20:33:08,852 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-04-06 20:33:08,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:08,853 INFO L225 Difference]: With dead ends: 184 [2022-04-06 20:33:08,853 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 20:33:08,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3251 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1398, Invalid=28358, Unknown=0, NotChecked=0, Total=29756 [2022-04-06 20:33:08,854 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 12985 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 13148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 12985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:08,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 99 Invalid, 13148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 12985 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:33:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 20:33:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-04-06 20:33:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2022-04-06 20:33:08,868 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2022-04-06 20:33:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:08,868 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2022-04-06 20:33:08,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2022-04-06 20:33:08,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 20:33:08,869 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:08,869 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:08,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:09,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:09,085 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1140867350, now seen corresponding path program 151 times [2022-04-06 20:33:09,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:09,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [507550687] [2022-04-06 20:33:09,086 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:09,086 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:09,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1140867350, now seen corresponding path program 152 times [2022-04-06 20:33:09,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:09,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973317209] [2022-04-06 20:33:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:09,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:11,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:11,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973317209] [2022-04-06 20:33:11,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973317209] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:11,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375881373] [2022-04-06 20:33:11,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:11,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:11,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:11,577 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:11,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:33:11,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:11,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:11,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 167 conjunts are in the unsatisfiable core [2022-04-06 20:33:11,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:12,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:21,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375881373] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:21,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:21,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 170 [2022-04-06 20:33:21,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:21,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [507550687] [2022-04-06 20:33:21,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [507550687] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:21,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:21,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 20:33:21,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531788584] [2022-04-06 20:33:21,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:21,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 20:33:21,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 20:33:21,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7391, Invalid=21339, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 20:33:21,186 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:27,533 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2022-04-06 20:33:27,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 20:33:27,533 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-04-06 20:33:27,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:27,534 INFO L225 Difference]: With dead ends: 186 [2022-04-06 20:33:27,534 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 20:33:27,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=14687, Invalid=48565, Unknown=0, NotChecked=0, Total=63252 [2022-04-06 20:33:27,537 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 13500 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 13665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 13500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:27,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 259 Invalid, 13665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 13500 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 20:33:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 20:33:27,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-04-06 20:33:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-04-06 20:33:27,546 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 175 [2022-04-06 20:33:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:27,546 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-04-06 20:33:27,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:27,547 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-04-06 20:33:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 20:33:27,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:27,547 INFO L499 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:27,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:27,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 20:33:27,748 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:27,748 INFO L85 PathProgramCache]: Analyzing trace with hash 785074183, now seen corresponding path program 153 times [2022-04-06 20:33:27,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:27,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [909590267] [2022-04-06 20:33:27,749 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:27,749 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash 785074183, now seen corresponding path program 154 times [2022-04-06 20:33:27,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:27,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553012608] [2022-04-06 20:33:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:30,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:30,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:30,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553012608] [2022-04-06 20:33:30,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553012608] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:30,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993368541] [2022-04-06 20:33:30,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:30,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:30,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:30,276 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:30,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:33:30,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:30,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:30,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 172 conjunts are in the unsatisfiable core [2022-04-06 20:33:30,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:31,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:42,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993368541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:42,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:42,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 89] total 175 [2022-04-06 20:33:42,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:42,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [909590267] [2022-04-06 20:33:42,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [909590267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:42,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:42,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 20:33:42,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84921560] [2022-04-06 20:33:42,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:42,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 20:33:42,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:42,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 20:33:42,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7571, Invalid=22879, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:33:42,236 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:48,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:48,801 INFO L93 Difference]: Finished difference Result 188 states and 191 transitions. [2022-04-06 20:33:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 20:33:48,802 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-04-06 20:33:48,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:48,802 INFO L225 Difference]: With dead ends: 188 [2022-04-06 20:33:48,802 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 20:33:48,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=15039, Invalid=51267, Unknown=0, NotChecked=0, Total=66306 [2022-04-06 20:33:48,805 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 13947 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 14114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 13947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:48,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 359 Invalid, 14114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 13947 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:33:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 20:33:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-04-06 20:33:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-04-06 20:33:48,814 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2022-04-06 20:33:48,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:48,814 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-04-06 20:33:48,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:48,814 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-04-06 20:33:48,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 20:33:48,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:48,815 INFO L499 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:48,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 20:33:49,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:49,015 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash 483982820, now seen corresponding path program 155 times [2022-04-06 20:33:49,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:49,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2073769481] [2022-04-06 20:33:49,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:49,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash 483982820, now seen corresponding path program 156 times [2022-04-06 20:33:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:49,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564768529] [2022-04-06 20:33:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:51,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:51,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:51,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564768529] [2022-04-06 20:33:51,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564768529] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:51,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409945936] [2022-04-06 20:33:51,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:51,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:51,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:51,617 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:51,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:33:51,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:33:51,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:51,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:33:51,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 249 proven. 1 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2022-04-06 20:33:52,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 249 proven. 1 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2022-04-06 20:33:52,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409945936] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:52,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:52,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 4, 8] total 95 [2022-04-06 20:33:52,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:52,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2073769481] [2022-04-06 20:33:52,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2073769481] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:52,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:52,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 20:33:52,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375041029] [2022-04-06 20:33:52,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:52,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 20:33:52,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 20:33:52,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=8317, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:33:52,671 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:59,319 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2022-04-06 20:33:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:33:59,319 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-04-06 20:33:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:59,320 INFO L225 Difference]: With dead ends: 190 [2022-04-06 20:33:59,320 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 20:33:59,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3497 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1449, Invalid=30413, Unknown=0, NotChecked=0, Total=31862 [2022-04-06 20:33:59,321 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 14338 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 14507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 14338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:59,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 409 Invalid, 14507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 14338 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 20:33:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 20:33:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-04-06 20:33:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2022-04-06 20:33:59,332 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 179 [2022-04-06 20:33:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:59,332 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2022-04-06 20:33:59,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2022-04-06 20:33:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 20:33:59,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:59,333 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:59,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 20:33:59,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:59,533 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1102008191, now seen corresponding path program 157 times [2022-04-06 20:33:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:59,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519514375] [2022-04-06 20:33:59,535 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:59,535 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:59,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1102008191, now seen corresponding path program 158 times [2022-04-06 20:33:59,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:59,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490281840] [2022-04-06 20:33:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:59,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:02,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:02,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490281840] [2022-04-06 20:34:02,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490281840] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939619711] [2022-04-06 20:34:02,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:02,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:02,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:02,196 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:02,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:34:02,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:02,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:02,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 172 conjunts are in the unsatisfiable core [2022-04-06 20:34:02,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:02,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:16,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939619711] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:16,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:16,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 88] total 175 [2022-04-06 20:34:16,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:16,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519514375] [2022-04-06 20:34:16,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519514375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:16,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:16,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 20:34:16,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238094384] [2022-04-06 20:34:16,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:16,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 20:34:16,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:16,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 20:34:16,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7829, Invalid=22621, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:34:16,412 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:23,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:23,112 INFO L93 Difference]: Finished difference Result 192 states and 195 transitions. [2022-04-06 20:34:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 20:34:23,112 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-04-06 20:34:23,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:23,113 INFO L225 Difference]: With dead ends: 192 [2022-04-06 20:34:23,113 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 20:34:23,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 276 SyntacticMatches, 2 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3830 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=15647, Invalid=51693, Unknown=0, NotChecked=0, Total=67340 [2022-04-06 20:34:23,116 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 14277 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 14448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 14277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:23,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 79 Invalid, 14448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 14277 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 20:34:23,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 20:34:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-04-06 20:34:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-04-06 20:34:23,125 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 181 [2022-04-06 20:34:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:23,125 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-04-06 20:34:23,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-04-06 20:34:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 20:34:23,126 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:23,126 INFO L499 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:23,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 20:34:23,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:23,342 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:23,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash -525979682, now seen corresponding path program 159 times [2022-04-06 20:34:23,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:23,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713961934] [2022-04-06 20:34:23,343 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:23,343 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:23,344 INFO L85 PathProgramCache]: Analyzing trace with hash -525979682, now seen corresponding path program 160 times [2022-04-06 20:34:23,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:23,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777075404] [2022-04-06 20:34:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:23,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:26,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:26,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777075404] [2022-04-06 20:34:26,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777075404] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746040117] [2022-04-06 20:34:26,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:26,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:26,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:26,073 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:26,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:34:26,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:26,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 174 conjunts are in the unsatisfiable core [2022-04-06 20:34:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:26,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:40,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746040117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:40,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:40,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 89] total 177 [2022-04-06 20:34:40,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:40,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713961934] [2022-04-06 20:34:40,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713961934] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:40,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:40,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 20:34:40,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742905011] [2022-04-06 20:34:40,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:40,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 20:34:40,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:40,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 20:34:40,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8007, Invalid=23145, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 20:34:40,161 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:47,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:47,069 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2022-04-06 20:34:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 20:34:47,070 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-04-06 20:34:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:47,070 INFO L225 Difference]: With dead ends: 194 [2022-04-06 20:34:47,070 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 20:34:47,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 279 SyntacticMatches, 2 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=16003, Invalid=52903, Unknown=0, NotChecked=0, Total=68906 [2022-04-06 20:34:47,073 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 14748 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 14921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 14748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:47,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 189 Invalid, 14921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 14748 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 20:34:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 20:34:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-04-06 20:34:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2022-04-06 20:34:47,086 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2022-04-06 20:34:47,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:47,086 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2022-04-06 20:34:47,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:47,086 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2022-04-06 20:34:47,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 20:34:47,087 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:47,087 INFO L499 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:47,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:47,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:47,303 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:47,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1013363717, now seen corresponding path program 161 times [2022-04-06 20:34:47,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:47,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [73595491] [2022-04-06 20:34:47,305 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:47,305 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:47,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1013363717, now seen corresponding path program 162 times [2022-04-06 20:34:47,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:47,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202083990] [2022-04-06 20:34:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:47,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:50,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:50,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:50,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202083990] [2022-04-06 20:34:50,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202083990] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:50,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556426877] [2022-04-06 20:34:50,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:50,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:50,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:50,037 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:50,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:34:50,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:34:50,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:50,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:34:50,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 258 proven. 1 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2022-04-06 20:34:50,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 258 proven. 1 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2022-04-06 20:34:51,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556426877] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:51,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:51,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 4, 8] total 98 [2022-04-06 20:34:51,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:51,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [73595491] [2022-04-06 20:34:51,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [73595491] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:51,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:51,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 20:34:51,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224336244] [2022-04-06 20:34:51,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:51,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 20:34:51,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:51,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 20:34:51,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=8872, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:34:51,051 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:57,984 INFO L93 Difference]: Finished difference Result 196 states and 199 transitions. [2022-04-06 20:34:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 20:34:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-04-06 20:34:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:57,985 INFO L225 Difference]: With dead ends: 196 [2022-04-06 20:34:57,985 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 20:34:57,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 364 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1500, Invalid=32540, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 20:34:57,986 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14917 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 15092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 14917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:57,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 44 Invalid, 15092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 14917 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 20:34:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 20:34:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-04-06 20:34:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2022-04-06 20:34:57,996 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2022-04-06 20:34:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:57,996 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2022-04-06 20:34:57,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2022-04-06 20:34:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 20:34:57,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:57,997 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:58,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:58,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:58,201 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1237986088, now seen corresponding path program 163 times [2022-04-06 20:34:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:58,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [867287632] [2022-04-06 20:34:58,203 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:58,203 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1237986088, now seen corresponding path program 164 times [2022-04-06 20:34:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:58,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312937359] [2022-04-06 20:34:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:00,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:00,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:00,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312937359] [2022-04-06 20:35:00,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312937359] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:00,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578414098] [2022-04-06 20:35:00,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:00,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:00,993 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:00,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:35:01,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:01,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:01,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 179 conjunts are in the unsatisfiable core [2022-04-06 20:35:01,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:01,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:11,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578414098] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:11,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:11,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 182 [2022-04-06 20:35:11,800 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:11,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [867287632] [2022-04-06 20:35:11,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [867287632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:11,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:11,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 20:35:11,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742382345] [2022-04-06 20:35:11,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:11,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 20:35:11,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 20:35:11,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8459, Invalid=24483, Unknown=0, NotChecked=0, Total=32942 [2022-04-06 20:35:11,802 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:18,878 INFO L93 Difference]: Finished difference Result 198 states and 201 transitions. [2022-04-06 20:35:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 20:35:18,878 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-04-06 20:35:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:18,879 INFO L225 Difference]: With dead ends: 198 [2022-04-06 20:35:18,879 INFO L226 Difference]: Without dead ends: 190 [2022-04-06 20:35:18,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4012 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=16817, Invalid=55813, Unknown=0, NotChecked=0, Total=72630 [2022-04-06 20:35:18,881 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 15402 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 15579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 15402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:18,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 159 Invalid, 15579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 15402 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 20:35:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-04-06 20:35:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-04-06 20:35:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2022-04-06 20:35:18,891 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 187 [2022-04-06 20:35:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:18,891 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2022-04-06 20:35:18,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2022-04-06 20:35:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 20:35:18,891 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:18,892 INFO L499 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:18,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 20:35:19,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 20:35:19,092 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:19,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1943247477, now seen corresponding path program 165 times [2022-04-06 20:35:19,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:19,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [310949058] [2022-04-06 20:35:19,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:19,093 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:19,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1943247477, now seen corresponding path program 166 times [2022-04-06 20:35:19,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:19,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115595423] [2022-04-06 20:35:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:19,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:21,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:21,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:21,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115595423] [2022-04-06 20:35:21,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115595423] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:21,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871976826] [2022-04-06 20:35:21,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:21,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:21,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:21,945 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:21,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:35:22,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:22,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:22,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 180 conjunts are in the unsatisfiable core [2022-04-06 20:35:22,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:22,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:37,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871976826] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:37,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:37,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 92] total 183 [2022-04-06 20:35:37,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:37,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [310949058] [2022-04-06 20:35:37,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [310949058] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:37,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:37,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 20:35:37,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245062056] [2022-04-06 20:35:37,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:37,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 20:35:37,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 20:35:37,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8553, Invalid=24753, Unknown=0, NotChecked=0, Total=33306 [2022-04-06 20:35:37,052 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:44,299 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2022-04-06 20:35:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 20:35:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-04-06 20:35:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:44,300 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:35:44,300 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 20:35:44,303 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 288 SyntacticMatches, 2 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4188 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=17095, Invalid=56617, Unknown=0, NotChecked=0, Total=73712 [2022-04-06 20:35:44,303 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 15747 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 15926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 15747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:44,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 154 Invalid, 15926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 15747 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 20:35:44,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 20:35:44,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-04-06 20:35:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2022-04-06 20:35:44,313 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2022-04-06 20:35:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:44,313 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2022-04-06 20:35:44,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2022-04-06 20:35:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 20:35:44,314 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:44,324 INFO L499 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:44,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:44,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:44,525 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:44,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1091988690, now seen corresponding path program 167 times [2022-04-06 20:35:44,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:44,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [242588812] [2022-04-06 20:35:44,526 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:44,526 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:44,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1091988690, now seen corresponding path program 168 times [2022-04-06 20:35:44,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:44,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240277931] [2022-04-06 20:35:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:44,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:47,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:47,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:47,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240277931] [2022-04-06 20:35:47,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240277931] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:47,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392166164] [2022-04-06 20:35:47,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:47,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:47,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:47,519 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:47,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:35:47,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:35:47,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:47,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:35:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 267 proven. 1 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-04-06 20:35:47,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 267 proven. 1 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-04-06 20:35:48,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392166164] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:48,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:48,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 4, 8] total 101 [2022-04-06 20:35:48,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:48,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [242588812] [2022-04-06 20:35:48,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [242588812] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:48,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:48,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 20:35:48,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730003532] [2022-04-06 20:35:48,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:48,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 20:35:48,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:48,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 20:35:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=9445, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:35:48,512 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:55,864 INFO L93 Difference]: Finished difference Result 202 states and 205 transitions. [2022-04-06 20:35:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 20:35:55,864 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-04-06 20:35:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:55,865 INFO L225 Difference]: With dead ends: 202 [2022-04-06 20:35:55,865 INFO L226 Difference]: Without dead ends: 194 [2022-04-06 20:35:55,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 376 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4016 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1551, Invalid=34739, Unknown=0, NotChecked=0, Total=36290 [2022-04-06 20:35:55,866 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 16042 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 16223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 16042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:55,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 104 Invalid, 16223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 16042 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 20:35:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-04-06 20:35:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-04-06 20:35:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2022-04-06 20:35:55,876 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2022-04-06 20:35:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:55,877 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2022-04-06 20:35:55,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2022-04-06 20:35:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 20:35:55,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:55,877 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:55,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-06 20:35:56,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:56,078 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:56,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:56,078 INFO L85 PathProgramCache]: Analyzing trace with hash -923919377, now seen corresponding path program 169 times [2022-04-06 20:35:56,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:56,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2026183328] [2022-04-06 20:35:56,079 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:56,079 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:56,079 INFO L85 PathProgramCache]: Analyzing trace with hash -923919377, now seen corresponding path program 170 times [2022-04-06 20:35:56,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:56,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312538669] [2022-04-06 20:35:56,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:56,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:59,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:59,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:59,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312538669] [2022-04-06 20:35:59,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312538669] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:59,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711224321] [2022-04-06 20:35:59,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:59,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:59,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:59,020 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:59,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:35:59,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:59,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:59,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 185 conjunts are in the unsatisfiable core [2022-04-06 20:35:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:59,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:10,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711224321] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:10,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:10,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 188 [2022-04-06 20:36:10,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:10,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2026183328] [2022-04-06 20:36:10,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2026183328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:10,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:10,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 20:36:10,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169881570] [2022-04-06 20:36:10,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:10,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 20:36:10,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 20:36:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9020, Invalid=26136, Unknown=0, NotChecked=0, Total=35156 [2022-04-06 20:36:10,577 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:18,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:18,141 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2022-04-06 20:36:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 20:36:18,141 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-04-06 20:36:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:18,142 INFO L225 Difference]: With dead ends: 204 [2022-04-06 20:36:18,142 INFO L226 Difference]: Without dead ends: 196 [2022-04-06 20:36:18,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 293 SyntacticMatches, 2 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4285 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=17936, Invalid=59626, Unknown=0, NotChecked=0, Total=77562 [2022-04-06 20:36:18,144 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 16383 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 16566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 16383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:18,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 89 Invalid, 16566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 16383 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 20:36:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-04-06 20:36:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-04-06 20:36:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-04-06 20:36:18,154 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 193 [2022-04-06 20:36:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:18,154 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-04-06 20:36:18,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:18,155 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-04-06 20:36:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 20:36:18,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:18,155 INFO L499 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:18,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 20:36:18,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:18,356 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:18,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1181321268, now seen corresponding path program 171 times [2022-04-06 20:36:18,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:18,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408840533] [2022-04-06 20:36:18,357 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:18,357 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1181321268, now seen corresponding path program 172 times [2022-04-06 20:36:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:18,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003637425] [2022-04-06 20:36:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:18,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:21,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:21,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:21,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003637425] [2022-04-06 20:36:21,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003637425] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:21,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587526270] [2022-04-06 20:36:21,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:21,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:21,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:21,416 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:21,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:36:21,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:21,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:21,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 186 conjunts are in the unsatisfiable core [2022-04-06 20:36:21,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:22,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:37,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587526270] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:37,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:37,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 95] total 189 [2022-04-06 20:36:37,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408840533] [2022-04-06 20:36:37,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408840533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:37,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:37,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 20:36:37,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344629388] [2022-04-06 20:36:37,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:37,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 20:36:37,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 20:36:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9117, Invalid=26415, Unknown=0, NotChecked=0, Total=35532 [2022-04-06 20:36:37,302 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:45,077 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2022-04-06 20:36:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 20:36:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-04-06 20:36:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:45,078 INFO L225 Difference]: With dead ends: 206 [2022-04-06 20:36:45,078 INFO L226 Difference]: Without dead ends: 198 [2022-04-06 20:36:45,080 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 297 SyntacticMatches, 2 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4467 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=18223, Invalid=60457, Unknown=0, NotChecked=0, Total=78680 [2022-04-06 20:36:45,080 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 16956 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 17141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 16956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:45,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 264 Invalid, 17141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 16956 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 20:36:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-04-06 20:36:45,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-04-06 20:36:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 193 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2022-04-06 20:36:45,090 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2022-04-06 20:36:45,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:45,091 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2022-04-06 20:36:45,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2022-04-06 20:36:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 20:36:45,091 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:45,091 INFO L499 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:45,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-04-06 20:36:45,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:45,297 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:45,297 INFO L85 PathProgramCache]: Analyzing trace with hash 563564649, now seen corresponding path program 173 times [2022-04-06 20:36:45,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:45,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1634266975] [2022-04-06 20:36:45,298 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:45,298 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash 563564649, now seen corresponding path program 174 times [2022-04-06 20:36:45,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:45,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145572905] [2022-04-06 20:36:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:45,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:48,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:48,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:48,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145572905] [2022-04-06 20:36:48,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145572905] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:48,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127067114] [2022-04-06 20:36:48,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:48,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:48,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:48,378 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:48,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:36:48,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:36:48,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:48,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:36:48,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 276 proven. 1 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-04-06 20:36:48,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 276 proven. 1 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-04-06 20:36:49,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127067114] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:49,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:49,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 4, 8] total 104 [2022-04-06 20:36:49,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:49,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1634266975] [2022-04-06 20:36:49,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1634266975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:49,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:49,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 20:36:49,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153812497] [2022-04-06 20:36:49,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:49,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 20:36:49,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:49,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 20:36:49,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=10036, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:36:49,534 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:57,424 INFO L93 Difference]: Finished difference Result 208 states and 211 transitions. [2022-04-06 20:36:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 20:36:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-04-06 20:36:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:57,425 INFO L225 Difference]: With dead ends: 208 [2022-04-06 20:36:57,425 INFO L226 Difference]: Without dead ends: 200 [2022-04-06 20:36:57,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4289 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1602, Invalid=37010, Unknown=0, NotChecked=0, Total=38612 [2022-04-06 20:36:57,426 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 17077 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 17264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 17077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:57,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 59 Invalid, 17264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 17077 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-04-06 20:36:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-04-06 20:36:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-04-06 20:36:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2022-04-06 20:36:57,437 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2022-04-06 20:36:57,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:57,437 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2022-04-06 20:36:57,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:57,437 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2022-04-06 20:36:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 20:36:57,446 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:57,446 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:57,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:57,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:57,647 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1933281850, now seen corresponding path program 175 times [2022-04-06 20:36:57,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:57,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323500287] [2022-04-06 20:36:57,648 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:57,649 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:57,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1933281850, now seen corresponding path program 176 times [2022-04-06 20:36:57,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:57,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692210660] [2022-04-06 20:36:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:57,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:00,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:00,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692210660] [2022-04-06 20:37:00,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692210660] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057655381] [2022-04-06 20:37:00,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:00,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:00,788 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:00,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:37:00,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:00,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:00,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 190 conjunts are in the unsatisfiable core [2022-04-06 20:37:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:01,555 INFO L328 TraceCheckSpWp]: Computing backward predicates...