/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:00:38,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:00:38,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:00:38,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:00:38,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:00:38,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:00:38,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:00:38,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:00:38,560 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:00:38,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:00:38,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:00:38,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:00:38,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:00:38,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:00:38,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:00:38,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:00:38,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:00:38,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:00:38,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:00:38,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:00:38,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:00:38,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:00:38,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:00:38,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:00:38,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:00:38,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:00:38,564 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:00:38,564 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:00:38,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:00:38,564 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:00:38,564 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:00:38,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:00:38,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:00:38,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:00:38,800 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:00:38,801 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:00:38,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-03-20 18:00:38,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fb8ad18/b6e7866daee94e55a93468fd755285da/FLAGf945e8b31 [2022-03-20 18:00:39,322 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:00:39,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-03-20 18:00:39,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fb8ad18/b6e7866daee94e55a93468fd755285da/FLAGf945e8b31 [2022-03-20 18:00:39,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fb8ad18/b6e7866daee94e55a93468fd755285da [2022-03-20 18:00:39,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:00:39,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:00:39,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:00:39,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:00:39,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:00:39,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:00:39" (1/1) ... [2022-03-20 18:00:39,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2567427c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:39, skipping insertion in model container [2022-03-20 18:00:39,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:00:39" (1/1) ... [2022-03-20 18:00:39,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:00:39,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:00:39,982 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2022-03-20 18:00:40,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:00:40,007 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:00:40,018 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2022-03-20 18:00:40,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:00:40,034 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:00:40,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:40 WrapperNode [2022-03-20 18:00:40,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:00:40,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:00:40,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:00:40,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:00:40,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:40" (1/1) ... [2022-03-20 18:00:40,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:40" (1/1) ... [2022-03-20 18:00:40,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:40" (1/1) ... [2022-03-20 18:00:40,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:40" (1/1) ... [2022-03-20 18:00:40,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:40" (1/1) ... [2022-03-20 18:00:40,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:40" (1/1) ... [2022-03-20 18:00:40,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:40" (1/1) ... [2022-03-20 18:00:40,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:00:40,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:00:40,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:00:40,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:00:40,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:40" (1/1) ... [2022-03-20 18:00:40,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:00:40,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:40,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 18:00:40,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 18:00:40,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:00:40,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:00:40,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:00:40,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:00:40,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:00:40,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:00:40,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:00:40,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 18:00:40,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 18:00:40,209 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:00:40,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:00:40,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:00:40,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:00:40,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:00:40,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 18:00:40,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:00:40,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:00:40,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:00:40,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:00:40,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:00:40,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:00:40,273 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:00:40,275 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:00:40,434 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:00:40,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:00:40,444 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 18:00:40,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:00:40 BoogieIcfgContainer [2022-03-20 18:00:40,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:00:40,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:00:40,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:00:40,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:00:40,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:00:39" (1/3) ... [2022-03-20 18:00:40,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c5afef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:00:40, skipping insertion in model container [2022-03-20 18:00:40,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:00:40" (2/3) ... [2022-03-20 18:00:40,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c5afef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:00:40, skipping insertion in model container [2022-03-20 18:00:40,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:00:40" (3/3) ... [2022-03-20 18:00:40,466 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2022-03-20 18:00:40,480 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:00:40,480 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:00:40,563 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:00:40,577 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 18:00:40,577 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:00:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:00:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 18:00:40,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:40,622 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:40,622 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 1 times [2022-03-20 18:00:40,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:40,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925554274] [2022-03-20 18:00:40,658 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:00:40,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 2 times [2022-03-20 18:00:40,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:40,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851485479] [2022-03-20 18:00:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:40,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:40,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:40,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:40,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851485479] [2022-03-20 18:00:40,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851485479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:40,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:40,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:00:40,891 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:40,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925554274] [2022-03-20 18:00:40,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925554274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:40,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:40,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:00:40,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822482133] [2022-03-20 18:00:40,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:40,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 18:00:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 18:00:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 18:00:40,973 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-03-20 18:00:41,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:41,149 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-03-20 18:00:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 18:00:41,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 [2022-03-20 18:00:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:41,170 INFO L225 Difference]: With dead ends: 42 [2022-03-20 18:00:41,170 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 18:00:41,172 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 [2022-03-20 18:00:41,177 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:41,179 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 18:00:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 18:00:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2022-03-20 18:00:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-20 18:00:41,274 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-03-20 18:00:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:41,274 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-20 18:00:41,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-03-20 18:00:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-20 18:00:41,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 18:00:41,276 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:41,276 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:41,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:00:41,277 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:41,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:41,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 1 times [2022-03-20 18:00:41,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:41,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1269057918] [2022-03-20 18:00:41,282 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:00:41,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 2 times [2022-03-20 18:00:41,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:41,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289657574] [2022-03-20 18:00:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:41,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:41,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:41,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:41,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289657574] [2022-03-20 18:00:41,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289657574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:41,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:41,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:00:41,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:41,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1269057918] [2022-03-20 18:00:41,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1269057918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:41,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:41,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:00:41,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952400407] [2022-03-20 18:00:41,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:41,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 18:00:41,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 18:00:41,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 18:00:41,386 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2022-03-20 18:00:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:41,434 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-03-20 18:00:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 18:00:41,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2022-03-20 18:00:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:41,436 INFO L225 Difference]: With dead ends: 35 [2022-03-20 18:00:41,437 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 18:00:41,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 18:00:41,441 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 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 [2022-03-20 18:00:41,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 18:00:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-03-20 18:00:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:41,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-20 18:00:41,457 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-03-20 18:00:41,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:41,458 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-20 18:00:41,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2022-03-20 18:00:41,458 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-20 18:00:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 18:00:41,459 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:41,459 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:41,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 18:00:41,459 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 1 times [2022-03-20 18:00:41,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:41,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123825867] [2022-03-20 18:00:41,469 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:41,469 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:41,470 INFO L85 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 2 times [2022-03-20 18:00:41,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:41,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026387429] [2022-03-20 18:00:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:41,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:41,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:00:41,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:41,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026387429] [2022-03-20 18:00:41,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026387429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:41,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165830390] [2022-03-20 18:00:41,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:41,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:41,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:41,594 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:41,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 18:00:41,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 18:00:41,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:00:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 18:00:41,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:00:41,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165830390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:41,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 18:00:41,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-03-20 18:00:41,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:41,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123825867] [2022-03-20 18:00:41,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123825867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:41,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:41,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 18:00:41,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544156890] [2022-03-20 18:00:41,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:41,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 18:00:41,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 18:00:41,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 18:00:41,750 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:41,777 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-03-20 18:00:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 18:00:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2022-03-20 18:00:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:41,778 INFO L225 Difference]: With dead ends: 29 [2022-03-20 18:00:41,778 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 18:00:41,778 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 18:00:41,779 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:41,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 18:00:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-03-20 18:00:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-03-20 18:00:41,784 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-03-20 18:00:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:41,784 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-03-20 18:00:41,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:41,784 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-03-20 18:00:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 18:00:41,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:41,785 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:41,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:42,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:42,004 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash -62255392, now seen corresponding path program 1 times [2022-03-20 18:00:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:42,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [251170324] [2022-03-20 18:00:42,007 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:42,007 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:42,007 INFO L85 PathProgramCache]: Analyzing trace with hash -62255392, now seen corresponding path program 2 times [2022-03-20 18:00:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:42,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619067101] [2022-03-20 18:00:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:42,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:42,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 18:00:42,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:42,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619067101] [2022-03-20 18:00:42,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619067101] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:42,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301758364] [2022-03-20 18:00:42,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:42,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:42,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:42,114 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:42,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 18:00:42,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:42,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:42,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 18:00:42,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 18:00:42,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 18:00:42,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301758364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:42,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:42,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 18:00:42,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [251170324] [2022-03-20 18:00:42,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [251170324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:42,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:42,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 18:00:42,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271057402] [2022-03-20 18:00:42,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:42,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 18:00:42,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:42,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 18:00:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 18:00:42,386 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:42,506 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-03-20 18:00:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 18:00:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 21 [2022-03-20 18:00:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:42,508 INFO L225 Difference]: With dead ends: 44 [2022-03-20 18:00:42,508 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 18:00:42,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 18:00:42,514 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:42,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 18:00:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-03-20 18:00:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2022-03-20 18:00:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 18:00:42,526 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2022-03-20 18:00:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:42,527 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 18:00:42,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 18:00:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 18:00:42,536 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:42,536 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:42,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:42,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 18:00:42,752 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 3 times [2022-03-20 18:00:42,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:42,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [69915298] [2022-03-20 18:00:42,773 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:42,773 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 4 times [2022-03-20 18:00:42,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:42,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400357264] [2022-03-20 18:00:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:42,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:43,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 18:00:43,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:43,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400357264] [2022-03-20 18:00:43,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400357264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:43,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27344363] [2022-03-20 18:00:43,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:43,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:43,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:43,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:43,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 18:00:43,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:43,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:43,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:00:43,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 18:00:43,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 18:00:43,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27344363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:43,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:43,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-03-20 18:00:43,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:43,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [69915298] [2022-03-20 18:00:43,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [69915298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:43,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:43,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:00:43,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563727551] [2022-03-20 18:00:43,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:43,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 18:00:43,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 18:00:43,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:00:43,386 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 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) [2022-03-20 18:00:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:43,542 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-03-20 18:00:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 18:00:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 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 23 [2022-03-20 18:00:43,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:43,557 INFO L225 Difference]: With dead ends: 35 [2022-03-20 18:00:43,557 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 18:00:43,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:00:43,558 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:43,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 18:00:43,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-03-20 18:00:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-03-20 18:00:43,594 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2022-03-20 18:00:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:43,595 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-03-20 18:00:43,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 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) [2022-03-20 18:00:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-03-20 18:00:43,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 18:00:43,596 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:43,596 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:43,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:43,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:43,800 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2073673735, now seen corresponding path program 5 times [2022-03-20 18:00:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:43,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1386418238] [2022-03-20 18:00:43,802 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:43,802 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:43,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2073673735, now seen corresponding path program 6 times [2022-03-20 18:00:43,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:43,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616769853] [2022-03-20 18:00:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:43,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:44,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:44,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616769853] [2022-03-20 18:00:44,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616769853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:44,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309120676] [2022-03-20 18:00:44,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:44,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:44,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:44,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:44,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 18:00:44,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 18:00:44,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:00:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 18:00:44,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 18:00:44,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309120676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:44,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:44,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-03-20 18:00:44,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:44,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1386418238] [2022-03-20 18:00:44,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1386418238] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:44,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:44,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:00:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218177949] [2022-03-20 18:00:44,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:44,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 18:00:44,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 18:00:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:00:44,290 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:44,345 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-03-20 18:00:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 18:00:44,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 18:00:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:44,346 INFO L225 Difference]: With dead ends: 54 [2022-03-20 18:00:44,346 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 18:00:44,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-03-20 18:00:44,347 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:44,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 27 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 18:00:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-03-20 18:00:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-20 18:00:44,351 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2022-03-20 18:00:44,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:44,352 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-20 18:00:44,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-20 18:00:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 18:00:44,352 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:44,352 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:44,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:44,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:44,587 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:44,588 INFO L85 PathProgramCache]: Analyzing trace with hash -550585065, now seen corresponding path program 7 times [2022-03-20 18:00:44,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:44,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [546394470] [2022-03-20 18:00:44,589 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:44,589 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash -550585065, now seen corresponding path program 8 times [2022-03-20 18:00:44,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:44,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318103731] [2022-03-20 18:00:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:44,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:44,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:44,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:44,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318103731] [2022-03-20 18:00:44,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318103731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97972412] [2022-03-20 18:00:44,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:44,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:44,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:44,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:44,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 18:00:44,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:44,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 18:00:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:44,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:44,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97972412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:44,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:44,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-20 18:00:44,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:44,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [546394470] [2022-03-20 18:00:44,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [546394470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:44,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:44,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:00:44,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104910024] [2022-03-20 18:00:44,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:44,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 18:00:44,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:44,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 18:00:44,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:00:44,770 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:44,837 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-03-20 18:00:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 18:00:44,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 18:00:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:44,838 INFO L225 Difference]: With dead ends: 61 [2022-03-20 18:00:44,838 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 18:00:44,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:00:44,839 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:44,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 27 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 18:00:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2022-03-20 18:00:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-20 18:00:44,843 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2022-03-20 18:00:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:44,843 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-20 18:00:44,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-20 18:00:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 18:00:44,844 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:44,844 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:44,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:45,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:45,062 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:45,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1446221131, now seen corresponding path program 9 times [2022-03-20 18:00:45,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:45,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1167897381] [2022-03-20 18:00:45,064 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:45,064 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1446221131, now seen corresponding path program 10 times [2022-03-20 18:00:45,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:45,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329582696] [2022-03-20 18:00:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:45,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:45,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:45,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:45,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329582696] [2022-03-20 18:00:45,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329582696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:45,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987670568] [2022-03-20 18:00:45,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:45,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:45,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:45,136 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:45,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 18:00:45,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:45,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:45,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:00:45,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:45,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:45,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987670568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:45,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:45,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 18:00:45,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:45,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1167897381] [2022-03-20 18:00:45,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1167897381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:45,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:45,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:00:45,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632600408] [2022-03-20 18:00:45,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:45,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 18:00:45,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:45,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 18:00:45,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 18:00:45,361 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:45,448 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-03-20 18:00:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:00:45,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 18:00:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:45,449 INFO L225 Difference]: With dead ends: 68 [2022-03-20 18:00:45,449 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 18:00:45,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-03-20 18:00:45,450 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:45,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 32 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:00:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 18:00:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2022-03-20 18:00:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-20 18:00:45,455 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 31 [2022-03-20 18:00:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:45,455 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-20 18:00:45,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-20 18:00:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 18:00:45,456 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:45,456 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:45,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:45,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:45,657 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1135945939, now seen corresponding path program 11 times [2022-03-20 18:00:45,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:45,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1377425811] [2022-03-20 18:00:45,659 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:45,659 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1135945939, now seen corresponding path program 12 times [2022-03-20 18:00:45,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:45,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873961755] [2022-03-20 18:00:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:45,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:45,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:45,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:45,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873961755] [2022-03-20 18:00:45,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873961755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:45,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418192838] [2022-03-20 18:00:45,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:45,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:45,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:45,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:45,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 18:00:45,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:00:45,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:45,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:00:45,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 18:00:45,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 18:00:46,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418192838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:46,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:46,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-20 18:00:46,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:46,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1377425811] [2022-03-20 18:00:46,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1377425811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:46,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:46,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:00:46,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415628998] [2022-03-20 18:00:46,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:46,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 18:00:46,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:46,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 18:00:46,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-03-20 18:00:46,065 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2022-03-20 18:00:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:46,180 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-03-20 18:00:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 18:00:46,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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 33 [2022-03-20 18:00:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:46,181 INFO L225 Difference]: With dead ends: 75 [2022-03-20 18:00:46,181 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 18:00:46,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-03-20 18:00:46,182 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:46,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 18:00:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2022-03-20 18:00:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-20 18:00:46,191 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 33 [2022-03-20 18:00:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:46,191 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-20 18:00:46,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2022-03-20 18:00:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-20 18:00:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 18:00:46,194 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:46,194 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:46,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:46,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:46,412 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:46,413 INFO L85 PathProgramCache]: Analyzing trace with hash 107403121, now seen corresponding path program 13 times [2022-03-20 18:00:46,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:46,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [787068028] [2022-03-20 18:00:46,414 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:46,414 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:46,414 INFO L85 PathProgramCache]: Analyzing trace with hash 107403121, now seen corresponding path program 14 times [2022-03-20 18:00:46,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:46,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51204855] [2022-03-20 18:00:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:46,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:46,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:46,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:46,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51204855] [2022-03-20 18:00:46,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51204855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:46,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550489728] [2022-03-20 18:00:46,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:46,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:46,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:46,562 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:46,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 18:00:46,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:46,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:46,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 18:00:46,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:46,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:46,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550489728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:46,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:46,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 18:00:46,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:46,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [787068028] [2022-03-20 18:00:46,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [787068028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:46,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:46,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:00:46,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176694009] [2022-03-20 18:00:46,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:46,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:00:46,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:00:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:00:46,822 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:46,934 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-03-20 18:00:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:00:46,935 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 35 [2022-03-20 18:00:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:46,935 INFO L225 Difference]: With dead ends: 82 [2022-03-20 18:00:46,935 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 18:00:46,936 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:00:46,936 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 158 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:46,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 22 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 18:00:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2022-03-20 18:00:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:46,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-03-20 18:00:46,941 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 35 [2022-03-20 18:00:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:46,942 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-03-20 18:00:46,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-03-20 18:00:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 18:00:46,942 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:46,942 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:46,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:47,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 18:00:47,156 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:47,156 INFO L85 PathProgramCache]: Analyzing trace with hash -479766897, now seen corresponding path program 15 times [2022-03-20 18:00:47,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:47,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2102804234] [2022-03-20 18:00:47,157 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:47,158 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash -479766897, now seen corresponding path program 16 times [2022-03-20 18:00:47,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:47,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474762834] [2022-03-20 18:00:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:47,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:47,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:47,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:47,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474762834] [2022-03-20 18:00:47,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474762834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:47,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285850573] [2022-03-20 18:00:47,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:47,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:47,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:47,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:47,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 18:00:47,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:47,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 18:00:47,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:47,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:47,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285850573] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:47,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:47,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-20 18:00:47,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:47,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2102804234] [2022-03-20 18:00:47,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2102804234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:47,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:47,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:00:47,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180414772] [2022-03-20 18:00:47,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:47,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:00:47,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:47,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:00:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-20 18:00:47,591 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:47,753 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2022-03-20 18:00:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 18:00:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 18:00:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:47,754 INFO L225 Difference]: With dead ends: 89 [2022-03-20 18:00:47,754 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 18:00:47,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:00:47,755 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:47,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 37 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 18:00:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2022-03-20 18:00:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-03-20 18:00:47,761 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2022-03-20 18:00:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:47,761 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-03-20 18:00:47,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-03-20 18:00:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 18:00:47,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:47,762 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:47,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:47,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:47,983 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2109438419, now seen corresponding path program 17 times [2022-03-20 18:00:47,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:47,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1258182293] [2022-03-20 18:00:47,985 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:47,986 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:47,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2109438419, now seen corresponding path program 18 times [2022-03-20 18:00:47,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:47,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144304787] [2022-03-20 18:00:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:47,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:48,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:48,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:48,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144304787] [2022-03-20 18:00:48,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144304787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:48,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207300028] [2022-03-20 18:00:48,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:48,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:48,124 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:48,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 18:00:48,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:00:48,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:00:48,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 18:00:48,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 18:00:48,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207300028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:48,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:48,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-03-20 18:00:48,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1258182293] [2022-03-20 18:00:48,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1258182293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:48,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:48,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 18:00:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760905211] [2022-03-20 18:00:48,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:48,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 18:00:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 18:00:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:00:48,362 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:48,559 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-03-20 18:00:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 18:00:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 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 39 [2022-03-20 18:00:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:48,560 INFO L225 Difference]: With dead ends: 96 [2022-03-20 18:00:48,560 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 18:00:48,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:00:48,561 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:48,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 22 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 18:00:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2022-03-20 18:00:48,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-03-20 18:00:48,567 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2022-03-20 18:00:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:48,567 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-03-20 18:00:48,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-03-20 18:00:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 18:00:48,568 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:48,568 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:48,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:48,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 18:00:48,795 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:48,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:48,796 INFO L85 PathProgramCache]: Analyzing trace with hash -560708021, now seen corresponding path program 19 times [2022-03-20 18:00:48,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:48,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [664894793] [2022-03-20 18:00:48,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:48,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash -560708021, now seen corresponding path program 20 times [2022-03-20 18:00:48,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:48,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38026414] [2022-03-20 18:00:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:48,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:48,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:48,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:48,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38026414] [2022-03-20 18:00:48,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38026414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:48,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103690054] [2022-03-20 18:00:48,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:48,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:48,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:48,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:48,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 18:00:48,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:48,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 18:00:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:48,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:49,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103690054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:49,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:49,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-20 18:00:49,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:49,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [664894793] [2022-03-20 18:00:49,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [664894793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:49,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:49,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:00:49,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229938102] [2022-03-20 18:00:49,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:49,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:00:49,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:00:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:00:49,188 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:49,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:49,368 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2022-03-20 18:00:49,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:00:49,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 41 [2022-03-20 18:00:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:49,369 INFO L225 Difference]: With dead ends: 103 [2022-03-20 18:00:49,369 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 18:00:49,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:00:49,370 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:49,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 37 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 18:00:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 44. [2022-03-20 18:00:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-03-20 18:00:49,377 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 41 [2022-03-20 18:00:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:49,377 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-03-20 18:00:49,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-03-20 18:00:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 18:00:49,377 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:49,377 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:49,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:49,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 18:00:49,595 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1710520041, now seen corresponding path program 21 times [2022-03-20 18:00:49,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:49,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1624914158] [2022-03-20 18:00:49,597 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:49,597 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1710520041, now seen corresponding path program 22 times [2022-03-20 18:00:49,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:49,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335055300] [2022-03-20 18:00:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:49,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:49,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:49,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:49,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335055300] [2022-03-20 18:00:49,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335055300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:49,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548170160] [2022-03-20 18:00:49,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:49,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:49,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:49,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:49,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 18:00:49,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:49,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:49,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 18:00:49,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:49,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:49,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548170160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:49,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:49,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 18:00:49,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1624914158] [2022-03-20 18:00:49,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1624914158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:49,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:49,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:00:49,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886627222] [2022-03-20 18:00:49,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:49,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:00:49,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:00:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:00:49,957 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:50,195 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2022-03-20 18:00:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:00:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-20 18:00:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:50,196 INFO L225 Difference]: With dead ends: 110 [2022-03-20 18:00:50,196 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 18:00:50,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:00:50,197 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 224 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:50,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 27 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 18:00:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2022-03-20 18:00:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-03-20 18:00:50,204 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2022-03-20 18:00:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:50,204 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-03-20 18:00:50,204 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-03-20 18:00:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 18:00:50,204 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:50,204 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:50,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:50,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 18:00:50,423 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1777666041, now seen corresponding path program 23 times [2022-03-20 18:00:50,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:50,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [947218228] [2022-03-20 18:00:50,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:50,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1777666041, now seen corresponding path program 24 times [2022-03-20 18:00:50,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:50,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186731658] [2022-03-20 18:00:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:50,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:50,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:50,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:50,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186731658] [2022-03-20 18:00:50,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186731658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:50,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311765140] [2022-03-20 18:00:50,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:50,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:50,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:50,532 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:50,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 18:00:50,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:00:50,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:50,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:00:50,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 18:00:50,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 18:00:50,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311765140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:50,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:50,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 21 [2022-03-20 18:00:50,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:50,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [947218228] [2022-03-20 18:00:50,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [947218228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:50,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:50,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:00:50,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254985397] [2022-03-20 18:00:50,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:50,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:00:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:00:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2022-03-20 18:00:50,794 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:51,011 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2022-03-20 18:00:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:00:51,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 45 [2022-03-20 18:00:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:51,012 INFO L225 Difference]: With dead ends: 117 [2022-03-20 18:00:51,012 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 18:00:51,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=680, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:00:51,013 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:51,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 27 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 18:00:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2022-03-20 18:00:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-03-20 18:00:51,020 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2022-03-20 18:00:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:51,020 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-03-20 18:00:51,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-03-20 18:00:51,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 18:00:51,021 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:51,021 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:51,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:51,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 18:00:51,238 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:51,238 INFO L85 PathProgramCache]: Analyzing trace with hash 444967333, now seen corresponding path program 25 times [2022-03-20 18:00:51,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:51,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1808853873] [2022-03-20 18:00:51,240 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:51,240 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash 444967333, now seen corresponding path program 26 times [2022-03-20 18:00:51,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:51,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514089567] [2022-03-20 18:00:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:51,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:51,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:51,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514089567] [2022-03-20 18:00:51,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514089567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:51,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704376313] [2022-03-20 18:00:51,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:51,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:51,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:51,344 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:51,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 18:00:51,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:51,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:51,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 18:00:51,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:51,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:51,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704376313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:51,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:51,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-20 18:00:51,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:51,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1808853873] [2022-03-20 18:00:51,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1808853873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:51,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:51,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:00:51,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621261101] [2022-03-20 18:00:51,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:51,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:00:51,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:51,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:00:51,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:00:51,702 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:51,955 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2022-03-20 18:00:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:00:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 47 [2022-03-20 18:00:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:51,956 INFO L225 Difference]: With dead ends: 124 [2022-03-20 18:00:51,956 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 18:00:51,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 18:00:51,957 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 241 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:51,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 32 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 18:00:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 50. [2022-03-20 18:00:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-03-20 18:00:51,966 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 47 [2022-03-20 18:00:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:51,966 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-03-20 18:00:51,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-03-20 18:00:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 18:00:51,967 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:51,967 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:51,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:52,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:52,183 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1796893635, now seen corresponding path program 27 times [2022-03-20 18:00:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:52,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [584200101] [2022-03-20 18:00:52,185 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:52,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:52,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1796893635, now seen corresponding path program 28 times [2022-03-20 18:00:52,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:52,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001517454] [2022-03-20 18:00:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:52,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:52,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:52,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:52,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001517454] [2022-03-20 18:00:52,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001517454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:52,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219415377] [2022-03-20 18:00:52,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:52,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:52,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:52,340 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:52,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 18:00:52,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:52,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:52,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 18:00:52,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:52,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:52,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219415377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:52,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:52,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 18:00:52,753 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:52,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [584200101] [2022-03-20 18:00:52,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [584200101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:52,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:52,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:00:52,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697450445] [2022-03-20 18:00:52,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:52,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:00:52,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:52,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:00:52,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:00:52,754 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:53,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:53,042 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2022-03-20 18:00:53,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:00:53,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 49 [2022-03-20 18:00:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:53,043 INFO L225 Difference]: With dead ends: 131 [2022-03-20 18:00:53,043 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 18:00:53,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:00:53,044 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 311 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:53,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 32 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:53,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 18:00:53,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2022-03-20 18:00:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-03-20 18:00:53,052 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 49 [2022-03-20 18:00:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:53,052 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-03-20 18:00:53,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-03-20 18:00:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 18:00:53,052 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:53,053 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:53,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:53,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 18:00:53,266 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:53,267 INFO L85 PathProgramCache]: Analyzing trace with hash -377020831, now seen corresponding path program 29 times [2022-03-20 18:00:53,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:53,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2062945815] [2022-03-20 18:00:53,268 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:53,268 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:53,268 INFO L85 PathProgramCache]: Analyzing trace with hash -377020831, now seen corresponding path program 30 times [2022-03-20 18:00:53,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:53,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628127872] [2022-03-20 18:00:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:53,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:53,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:53,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:53,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628127872] [2022-03-20 18:00:53,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628127872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:53,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11275705] [2022-03-20 18:00:53,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:53,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:53,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:53,399 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:53,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 18:00:53,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:00:53,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:53,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:00:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 18:00:53,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 18:00:53,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11275705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:53,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:53,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 24 [2022-03-20 18:00:53,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:53,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2062945815] [2022-03-20 18:00:53,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2062945815] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:53,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:53,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:00:53,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26383747] [2022-03-20 18:00:53,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:53,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:00:53,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:53,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:00:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:00:53,636 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:54,160 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2022-03-20 18:00:54,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 18:00:54,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 18:00:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:54,161 INFO L225 Difference]: With dead ends: 138 [2022-03-20 18:00:54,161 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 18:00:54,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=532, Invalid=950, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:00:54,162 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 334 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:54,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 27 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:00:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 18:00:54,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 54. [2022-03-20 18:00:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-03-20 18:00:54,170 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 51 [2022-03-20 18:00:54,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:54,170 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-03-20 18:00:54,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-03-20 18:00:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 18:00:54,170 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:54,170 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:54,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:54,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 18:00:54,378 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:54,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:54,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2140250495, now seen corresponding path program 31 times [2022-03-20 18:00:54,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:54,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [627388115] [2022-03-20 18:00:54,380 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:54,380 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2140250495, now seen corresponding path program 32 times [2022-03-20 18:00:54,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:54,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732609596] [2022-03-20 18:00:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:54,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:54,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:54,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732609596] [2022-03-20 18:00:54,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732609596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:54,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455475913] [2022-03-20 18:00:54,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:54,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:54,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:54,556 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:54,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 18:00:54,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 18:00:54,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:54,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:55,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455475913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:55,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:55,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 18:00:55,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:55,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [627388115] [2022-03-20 18:00:55,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [627388115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:55,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:55,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:00:55,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29563755] [2022-03-20 18:00:55,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:55,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 18:00:55,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:55,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 18:00:55,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:00:55,039 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:55,375 INFO L93 Difference]: Finished difference Result 145 states and 181 transitions. [2022-03-20 18:00:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:00:55,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 53 [2022-03-20 18:00:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:55,376 INFO L225 Difference]: With dead ends: 145 [2022-03-20 18:00:55,376 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 18:00:55,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:00:55,377 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 294 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:55,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 37 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 18:00:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 56. [2022-03-20 18:00:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-03-20 18:00:55,385 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 53 [2022-03-20 18:00:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:55,386 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-03-20 18:00:55,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-03-20 18:00:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 18:00:55,386 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:55,386 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:55,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:55,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:55,592 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1123560163, now seen corresponding path program 33 times [2022-03-20 18:00:55,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:55,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [836130305] [2022-03-20 18:00:55,594 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:55,594 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:55,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1123560163, now seen corresponding path program 34 times [2022-03-20 18:00:55,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:55,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464765181] [2022-03-20 18:00:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:55,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:55,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:55,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464765181] [2022-03-20 18:00:55,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464765181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:55,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055332362] [2022-03-20 18:00:55,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:00:55,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:55,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:55,844 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:55,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 18:00:55,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:00:55,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:55,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 18:00:55,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:56,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:56,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055332362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:56,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:56,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-20 18:00:56,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:56,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [836130305] [2022-03-20 18:00:56,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [836130305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:56,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:56,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:00:56,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450164854] [2022-03-20 18:00:56,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:56,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:00:56,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:56,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:00:56,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:00:56,486 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:56,852 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-03-20 18:00:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:00:56,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 55 [2022-03-20 18:00:56,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:56,853 INFO L225 Difference]: With dead ends: 152 [2022-03-20 18:00:56,853 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 18:00:56,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 18:00:56,856 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 319 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:56,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 32 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:00:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 18:00:56,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 58. [2022-03-20 18:00:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-03-20 18:00:56,871 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 55 [2022-03-20 18:00:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:56,871 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-03-20 18:00:56,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-03-20 18:00:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 18:00:56,872 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:56,872 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:56,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:57,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:57,090 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1975490875, now seen corresponding path program 35 times [2022-03-20 18:00:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:57,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1305873587] [2022-03-20 18:00:57,099 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:57,100 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1975490875, now seen corresponding path program 36 times [2022-03-20 18:00:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:57,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263266082] [2022-03-20 18:00:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:57,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:57,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:57,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:57,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263266082] [2022-03-20 18:00:57,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263266082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:57,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722249098] [2022-03-20 18:00:57,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:00:57,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:57,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:57,289 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:57,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 18:00:57,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:00:57,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:57,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:00:57,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 18:00:57,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 18:00:57,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722249098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:57,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:57,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 27 [2022-03-20 18:00:57,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:57,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1305873587] [2022-03-20 18:00:57,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1305873587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:57,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:57,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:00:57,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348814896] [2022-03-20 18:00:57,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:57,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:00:57,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:57,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:00:57,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:00:57,561 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:58,002 INFO L93 Difference]: Finished difference Result 159 states and 199 transitions. [2022-03-20 18:00:58,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:00:58,003 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 57 [2022-03-20 18:00:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:58,004 INFO L225 Difference]: With dead ends: 159 [2022-03-20 18:00:58,004 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 18:00:58,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=715, Invalid=1265, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:00:58,005 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 346 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:58,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 32 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:00:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 18:00:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 60. [2022-03-20 18:00:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-03-20 18:00:58,016 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 57 [2022-03-20 18:00:58,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:58,017 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-03-20 18:00:58,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-03-20 18:00:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 18:00:58,021 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:58,021 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:58,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 18:00:58,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:58,239 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:00:58,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:00:58,239 INFO L85 PathProgramCache]: Analyzing trace with hash -543765031, now seen corresponding path program 37 times [2022-03-20 18:00:58,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:58,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1603707662] [2022-03-20 18:00:58,240 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:00:58,240 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:00:58,241 INFO L85 PathProgramCache]: Analyzing trace with hash -543765031, now seen corresponding path program 38 times [2022-03-20 18:00:58,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:00:58,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757036784] [2022-03-20 18:00:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:00:58,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:00:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:58,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:00:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:00:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:58,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:00:58,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757036784] [2022-03-20 18:00:58,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757036784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:00:58,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763658405] [2022-03-20 18:00:58,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:00:58,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:00:58,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:00:58,454 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:00:58,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 18:00:58,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:00:58,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:00:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 18:00:58,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:00:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:58,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:00:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:00:59,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763658405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:00:59,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:00:59,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-20 18:00:59,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:00:59,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1603707662] [2022-03-20 18:00:59,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1603707662] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:00:59,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:00:59,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:00:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947016324] [2022-03-20 18:00:59,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:00:59,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:00:59,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:00:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:00:59,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:00:59,213 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:00:59,769 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2022-03-20 18:00:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:00:59,770 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 59 [2022-03-20 18:00:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:00:59,771 INFO L225 Difference]: With dead ends: 166 [2022-03-20 18:00:59,771 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 18:00:59,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 18:00:59,773 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 344 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:00:59,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 32 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:00:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 18:00:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 62. [2022-03-20 18:00:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-03-20 18:00:59,785 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2022-03-20 18:00:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:00:59,785 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-03-20 18:00:59,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:00:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-03-20 18:00:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 18:00:59,786 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:00:59,786 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:00:59,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:00,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 18:01:00,003 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:00,003 INFO L85 PathProgramCache]: Analyzing trace with hash 812864247, now seen corresponding path program 39 times [2022-03-20 18:01:00,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:00,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1012613685] [2022-03-20 18:01:00,004 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:00,004 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:00,005 INFO L85 PathProgramCache]: Analyzing trace with hash 812864247, now seen corresponding path program 40 times [2022-03-20 18:01:00,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:00,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515381785] [2022-03-20 18:01:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:00,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:00,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:00,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:00,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515381785] [2022-03-20 18:01:00,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515381785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:00,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555019193] [2022-03-20 18:01:00,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:00,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:00,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:00,226 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:00,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 18:01:00,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:00,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:00,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 18:01:00,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:00,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:00,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555019193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:00,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:00,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-20 18:01:00,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1012613685] [2022-03-20 18:01:00,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1012613685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:00,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:00,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:01:00,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156203634] [2022-03-20 18:01:00,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:00,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 18:01:00,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:00,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 18:01:00,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:01:00,881 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2022-03-20 18:01:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:01,315 INFO L93 Difference]: Finished difference Result 173 states and 217 transitions. [2022-03-20 18:01:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 18:01:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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 61 [2022-03-20 18:01:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:01,323 INFO L225 Difference]: With dead ends: 173 [2022-03-20 18:01:01,323 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 18:01:01,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:01:01,324 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 461 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:01,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 32 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 18:01:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 64. [2022-03-20 18:01:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-03-20 18:01:01,335 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2022-03-20 18:01:01,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:01,335 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-03-20 18:01:01,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2022-03-20 18:01:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-03-20 18:01:01,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 18:01:01,336 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:01,336 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:01,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:01,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-20 18:01:01,538 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1136457579, now seen corresponding path program 41 times [2022-03-20 18:01:01,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:01,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1034951553] [2022-03-20 18:01:01,540 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:01,540 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1136457579, now seen corresponding path program 42 times [2022-03-20 18:01:01,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:01,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233245721] [2022-03-20 18:01:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:01,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:01,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:01,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:01,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233245721] [2022-03-20 18:01:01,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233245721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:01,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300444679] [2022-03-20 18:01:01,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:01,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:01,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:01,772 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:01,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 18:01:01,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:01:01,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:01,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:01:01,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 18:01:01,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 18:01:02,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300444679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:02,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:02,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 30 [2022-03-20 18:01:02,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:02,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1034951553] [2022-03-20 18:01:02,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1034951553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:02,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:02,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:01:02,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404789944] [2022-03-20 18:01:02,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:02,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:01:02,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:02,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:01:02,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:01:02,049 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2022-03-20 18:01:02,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:02,580 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2022-03-20 18:01:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:01:02,582 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 63 [2022-03-20 18:01:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:02,582 INFO L225 Difference]: With dead ends: 180 [2022-03-20 18:01:02,582 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 18:01:02,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=925, Invalid=1625, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:01:02,583 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 433 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:02,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 32 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 18:01:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 66. [2022-03-20 18:01:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-03-20 18:01:02,596 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2022-03-20 18:01:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:02,596 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-03-20 18:01:02,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2022-03-20 18:01:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-03-20 18:01:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 18:01:02,596 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:02,596 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:02,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 18:01:02,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:02,798 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1828991309, now seen corresponding path program 43 times [2022-03-20 18:01:02,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:02,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843359561] [2022-03-20 18:01:02,799 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:02,800 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1828991309, now seen corresponding path program 44 times [2022-03-20 18:01:02,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:02,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453805062] [2022-03-20 18:01:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:02,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:02,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:02,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:02,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453805062] [2022-03-20 18:01:02,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453805062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:02,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912314689] [2022-03-20 18:01:02,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:02,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:03,004 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:03,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 18:01:03,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:03,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:03,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 18:01:03,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:03,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:03,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912314689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:03,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:03,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-20 18:01:03,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:03,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843359561] [2022-03-20 18:01:03,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843359561] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:03,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:03,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 18:01:03,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135207439] [2022-03-20 18:01:03,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:03,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 18:01:03,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 18:01:03,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:01:03,588 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:04,065 INFO L93 Difference]: Finished difference Result 187 states and 235 transitions. [2022-03-20 18:01:04,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:01:04,065 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 65 [2022-03-20 18:01:04,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:04,066 INFO L225 Difference]: With dead ends: 187 [2022-03-20 18:01:04,066 INFO L226 Difference]: Without dead ends: 170 [2022-03-20 18:01:04,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:01:04,069 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 474 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:04,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 32 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:01:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-20 18:01:04,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 68. [2022-03-20 18:01:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-03-20 18:01:04,088 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 65 [2022-03-20 18:01:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:04,088 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-03-20 18:01:04,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-03-20 18:01:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 18:01:04,089 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:04,089 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:04,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:04,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:04,300 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:04,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1633974959, now seen corresponding path program 45 times [2022-03-20 18:01:04,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:04,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138326709] [2022-03-20 18:01:04,302 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:04,302 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1633974959, now seen corresponding path program 46 times [2022-03-20 18:01:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:04,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288714885] [2022-03-20 18:01:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:04,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:04,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:04,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:04,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288714885] [2022-03-20 18:01:04,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288714885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:04,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744100229] [2022-03-20 18:01:04,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:04,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:04,515 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:04,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 18:01:04,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:04,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:04,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 18:01:04,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:04,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:05,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744100229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:05,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:05,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-20 18:01:05,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:05,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [138326709] [2022-03-20 18:01:05,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [138326709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:05,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:05,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:01:05,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572569499] [2022-03-20 18:01:05,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:05,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:01:05,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:01:05,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:01:05,301 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2022-03-20 18:01:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:05,855 INFO L93 Difference]: Finished difference Result 194 states and 244 transitions. [2022-03-20 18:01:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 18:01:05,855 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 67 [2022-03-20 18:01:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:05,856 INFO L225 Difference]: With dead ends: 194 [2022-03-20 18:01:05,856 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 18:01:05,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 18:01:05,857 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:05,857 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 52 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 18:01:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 70. [2022-03-20 18:01:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-03-20 18:01:05,873 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2022-03-20 18:01:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:05,873 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-03-20 18:01:05,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2022-03-20 18:01:05,874 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-03-20 18:01:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 18:01:05,874 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:05,874 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:05,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:06,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 18:01:06,078 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:06,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:06,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1093143663, now seen corresponding path program 47 times [2022-03-20 18:01:06,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:06,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [885652856] [2022-03-20 18:01:06,081 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:06,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:06,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1093143663, now seen corresponding path program 48 times [2022-03-20 18:01:06,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:06,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331041225] [2022-03-20 18:01:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:06,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:06,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:06,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331041225] [2022-03-20 18:01:06,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331041225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:06,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647712823] [2022-03-20 18:01:06,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:06,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:06,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:06,352 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:06,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 18:01:06,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:01:06,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:06,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:01:06,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-20 18:01:06,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-20 18:01:06,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647712823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:06,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:06,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 33 [2022-03-20 18:01:06,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:06,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [885652856] [2022-03-20 18:01:06,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [885652856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:06,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:06,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 18:01:06,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581800888] [2022-03-20 18:01:06,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:06,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 18:01:06,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:06,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 18:01:06,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:01:06,703 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:07,394 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2022-03-20 18:01:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 18:01:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 69 [2022-03-20 18:01:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:07,395 INFO L225 Difference]: With dead ends: 201 [2022-03-20 18:01:07,395 INFO L226 Difference]: Without dead ends: 184 [2022-03-20 18:01:07,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:01:07,396 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 517 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:07,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 47 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-20 18:01:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 72. [2022-03-20 18:01:07,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:07,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-03-20 18:01:07,412 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2022-03-20 18:01:07,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:07,413 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-03-20 18:01:07,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-03-20 18:01:07,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 18:01:07,413 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:07,413 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:07,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:07,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 18:01:07,615 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:07,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1924088845, now seen corresponding path program 49 times [2022-03-20 18:01:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:07,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [572857125] [2022-03-20 18:01:07,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:07,617 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1924088845, now seen corresponding path program 50 times [2022-03-20 18:01:07,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:07,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009615608] [2022-03-20 18:01:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:07,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:07,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:07,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:07,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009615608] [2022-03-20 18:01:07,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009615608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:07,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813417183] [2022-03-20 18:01:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:07,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:07,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:07,901 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:07,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 18:01:08,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:08,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:08,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 18:01:08,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:08,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:08,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813417183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:08,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:08,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-20 18:01:08,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:08,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [572857125] [2022-03-20 18:01:08,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [572857125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:08,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:08,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 18:01:08,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745904967] [2022-03-20 18:01:08,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:08,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 18:01:08,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:08,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 18:01:08,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:01:08,935 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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) [2022-03-20 18:01:09,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:09,683 INFO L93 Difference]: Finished difference Result 208 states and 262 transitions. [2022-03-20 18:01:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 18:01:09,693 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 71 [2022-03-20 18:01:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:09,694 INFO L225 Difference]: With dead ends: 208 [2022-03-20 18:01:09,694 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 18:01:09,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 18:01:09,695 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 451 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:09,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 57 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:09,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 18:01:09,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 74. [2022-03-20 18:01:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-03-20 18:01:09,712 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2022-03-20 18:01:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:09,713 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-03-20 18:01:09,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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) [2022-03-20 18:01:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-03-20 18:01:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 18:01:09,713 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:09,713 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:09,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:09,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 18:01:09,931 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:09,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:09,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1598491691, now seen corresponding path program 51 times [2022-03-20 18:01:09,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:09,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [55026247] [2022-03-20 18:01:09,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:09,932 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:09,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1598491691, now seen corresponding path program 52 times [2022-03-20 18:01:09,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:09,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694454399] [2022-03-20 18:01:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:09,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:10,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:10,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694454399] [2022-03-20 18:01:10,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694454399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:10,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82157164] [2022-03-20 18:01:10,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:10,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:10,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:10,196 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:10,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 18:01:10,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:10,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:10,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 18:01:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:10,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:11,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82157164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:11,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:11,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-20 18:01:11,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:11,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [55026247] [2022-03-20 18:01:11,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [55026247] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:11,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:11,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:01:11,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324016699] [2022-03-20 18:01:11,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:11,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 18:01:11,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:11,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 18:01:11,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:01:11,182 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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) [2022-03-20 18:01:12,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:12,022 INFO L93 Difference]: Finished difference Result 215 states and 271 transitions. [2022-03-20 18:01:12,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:01:12,022 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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 73 [2022-03-20 18:01:12,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:12,023 INFO L225 Difference]: With dead ends: 215 [2022-03-20 18:01:12,023 INFO L226 Difference]: Without dead ends: 198 [2022-03-20 18:01:12,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:01:12,025 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 560 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:12,025 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 32 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-03-20 18:01:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 76. [2022-03-20 18:01:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-03-20 18:01:12,044 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 73 [2022-03-20 18:01:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:12,044 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-03-20 18:01:12,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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) [2022-03-20 18:01:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-03-20 18:01:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 18:01:12,045 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:12,045 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:12,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:12,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 18:01:12,262 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:12,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2062727991, now seen corresponding path program 53 times [2022-03-20 18:01:12,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:12,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1305536105] [2022-03-20 18:01:12,264 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:12,264 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:12,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2062727991, now seen corresponding path program 54 times [2022-03-20 18:01:12,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:12,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114877748] [2022-03-20 18:01:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:12,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:12,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:12,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:12,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114877748] [2022-03-20 18:01:12,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114877748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:12,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391226810] [2022-03-20 18:01:12,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:12,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:12,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:12,585 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:12,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 18:01:12,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:01:12,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:12,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:01:12,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 18:01:12,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 18:01:12,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391226810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:12,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:12,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 36 [2022-03-20 18:01:12,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1305536105] [2022-03-20 18:01:12,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1305536105] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:12,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:12,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 18:01:12,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613087369] [2022-03-20 18:01:12,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:12,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 18:01:12,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 18:01:12,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:01:12,980 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-20 18:01:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:13,920 INFO L93 Difference]: Finished difference Result 222 states and 280 transitions. [2022-03-20 18:01:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 18:01:13,920 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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 75 [2022-03-20 18:01:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:13,921 INFO L225 Difference]: With dead ends: 222 [2022-03-20 18:01:13,921 INFO L226 Difference]: Without dead ends: 205 [2022-03-20 18:01:13,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1426, Invalid=2480, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 18:01:13,922 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 593 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:13,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 32 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-20 18:01:13,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 78. [2022-03-20 18:01:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-03-20 18:01:13,943 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2022-03-20 18:01:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:13,944 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-03-20 18:01:13,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 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) [2022-03-20 18:01:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-03-20 18:01:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 18:01:13,944 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:13,944 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:13,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:14,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:14,162 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:14,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:14,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1378340327, now seen corresponding path program 55 times [2022-03-20 18:01:14,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:14,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005908643] [2022-03-20 18:01:14,163 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:14,163 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:14,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1378340327, now seen corresponding path program 56 times [2022-03-20 18:01:14,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:14,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637882848] [2022-03-20 18:01:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:14,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:14,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:14,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637882848] [2022-03-20 18:01:14,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637882848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077782087] [2022-03-20 18:01:14,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:14,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:14,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:14,503 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:14,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 18:01:14,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:14,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:14,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 18:01:14,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:14,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:15,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077782087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:15,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:15,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-20 18:01:15,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:15,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005908643] [2022-03-20 18:01:15,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005908643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:15,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:15,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:01:15,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232996337] [2022-03-20 18:01:15,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:15,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 18:01:15,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:15,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 18:01:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:01:15,638 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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) [2022-03-20 18:01:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:16,672 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2022-03-20 18:01:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:01:16,672 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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 77 [2022-03-20 18:01:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:16,673 INFO L225 Difference]: With dead ends: 229 [2022-03-20 18:01:16,673 INFO L226 Difference]: Without dead ends: 212 [2022-03-20 18:01:16,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:01:16,674 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 641 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:16,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 32 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-20 18:01:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 80. [2022-03-20 18:01:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-03-20 18:01:16,695 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2022-03-20 18:01:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:16,695 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-03-20 18:01:16,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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) [2022-03-20 18:01:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-03-20 18:01:16,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 18:01:16,696 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:16,696 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:16,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:16,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:16,913 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:16,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:16,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1120176005, now seen corresponding path program 57 times [2022-03-20 18:01:16,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:16,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [112818169] [2022-03-20 18:01:16,915 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:16,915 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:16,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1120176005, now seen corresponding path program 58 times [2022-03-20 18:01:16,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:16,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477147016] [2022-03-20 18:01:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:16,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:17,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:17,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477147016] [2022-03-20 18:01:17,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477147016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126178696] [2022-03-20 18:01:17,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:17,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:17,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:17,273 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:17,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 18:01:17,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:17,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:17,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 18:01:17,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:17,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:18,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126178696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:18,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:18,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-20 18:01:18,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:18,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [112818169] [2022-03-20 18:01:18,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [112818169] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:18,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:18,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:01:18,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698334951] [2022-03-20 18:01:18,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:18,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:01:18,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:18,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:01:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:01:18,509 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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) [2022-03-20 18:01:19,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:19,838 INFO L93 Difference]: Finished difference Result 236 states and 298 transitions. [2022-03-20 18:01:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 18:01:19,838 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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 79 [2022-03-20 18:01:19,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:19,839 INFO L225 Difference]: With dead ends: 236 [2022-03-20 18:01:19,839 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 18:01:19,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 18:01:19,842 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 792 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:19,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 22 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:01:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 18:01:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 82. [2022-03-20 18:01:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-03-20 18:01:19,891 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2022-03-20 18:01:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:19,912 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-03-20 18:01:19,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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) [2022-03-20 18:01:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-03-20 18:01:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 18:01:19,912 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:19,912 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:19,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:20,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-20 18:01:20,113 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:20,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:20,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2132365731, now seen corresponding path program 59 times [2022-03-20 18:01:20,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:20,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [120763623] [2022-03-20 18:01:20,115 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:20,115 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:20,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2132365731, now seen corresponding path program 60 times [2022-03-20 18:01:20,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:20,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667317654] [2022-03-20 18:01:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:20,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:20,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:20,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:20,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667317654] [2022-03-20 18:01:20,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667317654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:20,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457613987] [2022-03-20 18:01:20,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:20,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:20,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:20,672 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:20,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 18:01:20,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:01:20,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:20,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:01:20,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 18:01:20,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 18:01:21,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457613987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:21,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:21,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 39 [2022-03-20 18:01:21,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:21,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [120763623] [2022-03-20 18:01:21,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [120763623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:21,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:21,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:01:21,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467256352] [2022-03-20 18:01:21,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:21,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 18:01:21,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 18:01:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:01:21,057 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 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) [2022-03-20 18:01:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:22,287 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2022-03-20 18:01:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 18:01:22,288 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 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 81 [2022-03-20 18:01:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:22,288 INFO L225 Difference]: With dead ends: 243 [2022-03-20 18:01:22,288 INFO L226 Difference]: Without dead ends: 226 [2022-03-20 18:01:22,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1717, Invalid=2975, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 18:01:22,289 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 667 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:22,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 37 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-20 18:01:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 84. [2022-03-20 18:01:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-03-20 18:01:22,313 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 81 [2022-03-20 18:01:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:22,313 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-03-20 18:01:22,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 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) [2022-03-20 18:01:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-03-20 18:01:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 18:01:22,313 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:22,313 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:22,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:22,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:22,518 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:22,519 INFO L85 PathProgramCache]: Analyzing trace with hash -110883775, now seen corresponding path program 61 times [2022-03-20 18:01:22,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:22,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2098635164] [2022-03-20 18:01:22,520 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:22,520 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash -110883775, now seen corresponding path program 62 times [2022-03-20 18:01:22,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:22,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117439390] [2022-03-20 18:01:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:22,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:23,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117439390] [2022-03-20 18:01:23,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117439390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:23,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256547366] [2022-03-20 18:01:23,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:23,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:23,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:23,109 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:23,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 18:01:23,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:23,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:23,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 18:01:23,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:23,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:24,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256547366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:24,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:24,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-20 18:01:24,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2098635164] [2022-03-20 18:01:24,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2098635164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:24,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:24,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 18:01:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830075211] [2022-03-20 18:01:24,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:24,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 18:01:24,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 18:01:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 18:01:24,564 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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) [2022-03-20 18:01:25,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:25,728 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2022-03-20 18:01:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:01:25,728 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 83 [2022-03-20 18:01:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:25,729 INFO L225 Difference]: With dead ends: 250 [2022-03-20 18:01:25,729 INFO L226 Difference]: Without dead ends: 233 [2022-03-20 18:01:25,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 18:01:25,730 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 856 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:25,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 27 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:01:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-20 18:01:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 86. [2022-03-20 18:01:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-03-20 18:01:25,764 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2022-03-20 18:01:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:25,764 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-03-20 18:01:25,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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) [2022-03-20 18:01:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-03-20 18:01:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 18:01:25,765 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:25,765 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:25,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 18:01:25,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:25,979 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:25,980 INFO L85 PathProgramCache]: Analyzing trace with hash 199923551, now seen corresponding path program 63 times [2022-03-20 18:01:25,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:25,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60635454] [2022-03-20 18:01:25,981 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:25,981 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash 199923551, now seen corresponding path program 64 times [2022-03-20 18:01:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:25,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358227596] [2022-03-20 18:01:25,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:25,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:26,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:26,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:26,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358227596] [2022-03-20 18:01:26,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358227596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:26,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115639517] [2022-03-20 18:01:26,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:26,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:26,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:26,385 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:26,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 18:01:26,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:26,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 18:01:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:26,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:27,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115639517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:27,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:27,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-20 18:01:27,496 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:27,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60635454] [2022-03-20 18:01:27,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60635454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:27,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:27,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 18:01:27,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895379229] [2022-03-20 18:01:27,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:27,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 18:01:27,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:27,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 18:01:27,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:01:27,497 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:28,766 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2022-03-20 18:01:28,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 18:01:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 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 85 [2022-03-20 18:01:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:28,767 INFO L225 Difference]: With dead ends: 257 [2022-03-20 18:01:28,768 INFO L226 Difference]: Without dead ends: 240 [2022-03-20 18:01:28,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:01:28,768 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 741 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:28,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 42 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:28,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-20 18:01:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 88. [2022-03-20 18:01:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-03-20 18:01:28,794 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2022-03-20 18:01:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:28,795 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-03-20 18:01:28,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-03-20 18:01:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 18:01:28,795 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:28,795 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:28,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-20 18:01:29,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 18:01:29,006 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1761946883, now seen corresponding path program 65 times [2022-03-20 18:01:29,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:29,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220410834] [2022-03-20 18:01:29,008 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:29,008 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1761946883, now seen corresponding path program 66 times [2022-03-20 18:01:29,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:29,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711194316] [2022-03-20 18:01:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:29,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:29,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:29,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:29,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711194316] [2022-03-20 18:01:29,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711194316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:29,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562765965] [2022-03-20 18:01:29,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:29,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:29,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:29,456 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:29,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 18:01:29,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:01:29,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:29,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:01:29,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-20 18:01:29,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-20 18:01:29,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562765965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:29,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:29,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 42 [2022-03-20 18:01:29,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:29,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220410834] [2022-03-20 18:01:29,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220410834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:29,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:29,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 18:01:29,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120791047] [2022-03-20 18:01:29,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:29,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 18:01:29,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 18:01:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:01:29,832 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 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) [2022-03-20 18:01:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:31,196 INFO L93 Difference]: Finished difference Result 264 states and 334 transitions. [2022-03-20 18:01:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 18:01:31,197 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 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 87 [2022-03-20 18:01:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:31,198 INFO L225 Difference]: With dead ends: 264 [2022-03-20 18:01:31,198 INFO L226 Difference]: Without dead ends: 247 [2022-03-20 18:01:31,198 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2035, Invalid=3515, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 18:01:31,198 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 696 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:31,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 42 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-20 18:01:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 90. [2022-03-20 18:01:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-03-20 18:01:31,227 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2022-03-20 18:01:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:31,227 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-03-20 18:01:31,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 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) [2022-03-20 18:01:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-03-20 18:01:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 18:01:31,228 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:31,228 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:31,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:31,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 18:01:31,455 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:31,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1628791013, now seen corresponding path program 67 times [2022-03-20 18:01:31,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:31,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1912428078] [2022-03-20 18:01:31,457 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:31,457 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:31,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1628791013, now seen corresponding path program 68 times [2022-03-20 18:01:31,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:31,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881375962] [2022-03-20 18:01:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:31,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:31,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:31,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:31,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881375962] [2022-03-20 18:01:31,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881375962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:31,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518294779] [2022-03-20 18:01:31,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:31,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:31,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:31,919 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:31,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 18:01:32,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:32,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 18:01:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:32,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:33,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518294779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:33,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:33,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-20 18:01:33,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:33,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1912428078] [2022-03-20 18:01:33,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1912428078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:33,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:33,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:01:33,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576850774] [2022-03-20 18:01:33,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:33,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 18:01:33,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 18:01:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:01:33,425 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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) [2022-03-20 18:01:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:34,864 INFO L93 Difference]: Finished difference Result 271 states and 343 transitions. [2022-03-20 18:01:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 18:01:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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 89 [2022-03-20 18:01:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:34,865 INFO L225 Difference]: With dead ends: 271 [2022-03-20 18:01:34,865 INFO L226 Difference]: Without dead ends: 254 [2022-03-20 18:01:34,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 18:01:34,867 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 888 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:34,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 32 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-20 18:01:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 92. [2022-03-20 18:01:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-03-20 18:01:34,923 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2022-03-20 18:01:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:34,924 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-03-20 18:01:34,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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) [2022-03-20 18:01:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-03-20 18:01:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 18:01:34,925 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:34,926 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:34,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:35,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 18:01:35,139 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:35,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1779948473, now seen corresponding path program 69 times [2022-03-20 18:01:35,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:35,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1575657991] [2022-03-20 18:01:35,141 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:35,141 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1779948473, now seen corresponding path program 70 times [2022-03-20 18:01:35,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:35,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505172442] [2022-03-20 18:01:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:35,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:35,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:35,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:35,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505172442] [2022-03-20 18:01:35,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505172442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:35,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510716256] [2022-03-20 18:01:35,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:35,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:35,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:35,734 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:35,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 18:01:35,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:35,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 18:01:35,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:36,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:37,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510716256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:37,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:37,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-20 18:01:37,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:37,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1575657991] [2022-03-20 18:01:37,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1575657991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:37,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:37,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:01:37,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660353508] [2022-03-20 18:01:37,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:37,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:01:37,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:37,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:01:37,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 18:01:37,592 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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) [2022-03-20 18:01:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:39,814 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2022-03-20 18:01:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 18:01:39,814 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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 91 [2022-03-20 18:01:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:39,831 INFO L225 Difference]: With dead ends: 278 [2022-03-20 18:01:39,831 INFO L226 Difference]: Without dead ends: 261 [2022-03-20 18:01:39,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 18:01:39,833 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 798 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:39,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 47 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:01:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-20 18:01:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 94. [2022-03-20 18:01:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-03-20 18:01:39,909 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 91 [2022-03-20 18:01:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:39,909 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-03-20 18:01:39,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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) [2022-03-20 18:01:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-03-20 18:01:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 18:01:39,910 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:39,910 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:39,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:40,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:40,135 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:40,136 INFO L85 PathProgramCache]: Analyzing trace with hash 518547671, now seen corresponding path program 71 times [2022-03-20 18:01:40,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:40,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1509049834] [2022-03-20 18:01:40,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:40,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash 518547671, now seen corresponding path program 72 times [2022-03-20 18:01:40,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:40,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547486344] [2022-03-20 18:01:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:40,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:40,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:40,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:40,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547486344] [2022-03-20 18:01:40,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547486344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:40,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529971449] [2022-03-20 18:01:40,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:40,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:40,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:40,826 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) [2022-03-20 18:01:40,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 18:01:40,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:01:40,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:40,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:01:40,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-03-20 18:01:41,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-03-20 18:01:41,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529971449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:41,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:41,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 7, 7] total 45 [2022-03-20 18:01:41,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:41,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1509049834] [2022-03-20 18:01:41,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1509049834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:41,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:41,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 18:01:41,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688151223] [2022-03-20 18:01:41,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:41,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 18:01:41,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:41,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 18:01:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:01:41,318 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 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) [2022-03-20 18:01:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:43,157 INFO L93 Difference]: Finished difference Result 285 states and 361 transitions. [2022-03-20 18:01:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 18:01:43,158 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 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 93 [2022-03-20 18:01:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:43,159 INFO L225 Difference]: With dead ends: 285 [2022-03-20 18:01:43,159 INFO L226 Difference]: Without dead ends: 268 [2022-03-20 18:01:43,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2380, Invalid=4100, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 18:01:43,160 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 884 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:43,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 42 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:43,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-20 18:01:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 96. [2022-03-20 18:01:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-03-20 18:01:43,217 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2022-03-20 18:01:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:43,217 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-03-20 18:01:43,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 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) [2022-03-20 18:01:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-03-20 18:01:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 18:01:43,217 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:43,217 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:43,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:43,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 18:01:43,433 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:43,433 INFO L85 PathProgramCache]: Analyzing trace with hash -506845579, now seen corresponding path program 73 times [2022-03-20 18:01:43,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:43,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [124726291] [2022-03-20 18:01:43,435 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:43,435 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -506845579, now seen corresponding path program 74 times [2022-03-20 18:01:43,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:43,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878751822] [2022-03-20 18:01:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:44,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:44,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878751822] [2022-03-20 18:01:44,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878751822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:44,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286303300] [2022-03-20 18:01:44,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:44,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:44,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:44,248 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:44,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 18:01:44,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:44,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:44,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 18:01:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:44,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:46,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286303300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:46,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:46,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-20 18:01:46,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:46,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [124726291] [2022-03-20 18:01:46,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [124726291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:46,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:46,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:01:46,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501941931] [2022-03-20 18:01:46,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:46,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:01:46,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:46,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:01:46,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 18:01:46,177 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2022-03-20 18:01:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:48,023 INFO L93 Difference]: Finished difference Result 292 states and 370 transitions. [2022-03-20 18:01:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:01:48,023 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 95 [2022-03-20 18:01:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:48,024 INFO L225 Difference]: With dead ends: 292 [2022-03-20 18:01:48,024 INFO L226 Difference]: Without dead ends: 275 [2022-03-20 18:01:48,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 18:01:48,025 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 727 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:48,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 47 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-20 18:01:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 98. [2022-03-20 18:01:48,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.053763440860215) internal successors, (98), 93 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-03-20 18:01:48,070 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2022-03-20 18:01:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:48,070 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-03-20 18:01:48,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2022-03-20 18:01:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-03-20 18:01:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 18:01:48,080 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:48,081 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:48,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:48,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 18:01:48,303 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:48,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1932719251, now seen corresponding path program 75 times [2022-03-20 18:01:48,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:48,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2000595193] [2022-03-20 18:01:48,305 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:48,305 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1932719251, now seen corresponding path program 76 times [2022-03-20 18:01:48,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:48,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791274595] [2022-03-20 18:01:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:48,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:48,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:48,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791274595] [2022-03-20 18:01:48,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791274595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404684848] [2022-03-20 18:01:48,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:01:48,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:48,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:48,884 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:48,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 18:01:49,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:01:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:01:49,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:49,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:50,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404684848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:50,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:50,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-20 18:01:50,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:50,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2000595193] [2022-03-20 18:01:50,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2000595193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:50,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:50,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 18:01:50,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623793499] [2022-03-20 18:01:50,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:50,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 18:01:50,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 18:01:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:01:50,740 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 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) [2022-03-20 18:01:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:52,751 INFO L93 Difference]: Finished difference Result 299 states and 379 transitions. [2022-03-20 18:01:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 18:01:52,752 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 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 97 [2022-03-20 18:01:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:52,753 INFO L225 Difference]: With dead ends: 299 [2022-03-20 18:01:52,753 INFO L226 Difference]: Without dead ends: 282 [2022-03-20 18:01:52,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 18:01:52,754 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 904 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:52,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 42 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:01:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-20 18:01:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 100. [2022-03-20 18:01:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-03-20 18:01:52,791 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 97 [2022-03-20 18:01:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:52,791 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-03-20 18:01:52,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 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) [2022-03-20 18:01:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-03-20 18:01:52,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 18:01:52,792 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:52,792 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:52,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:53,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:53,008 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:53,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:53,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1302377265, now seen corresponding path program 77 times [2022-03-20 18:01:53,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:53,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1037808031] [2022-03-20 18:01:53,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:53,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:53,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1302377265, now seen corresponding path program 78 times [2022-03-20 18:01:53,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:53,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586545606] [2022-03-20 18:01:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:53,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:53,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:53,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:53,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586545606] [2022-03-20 18:01:53,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586545606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:53,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345653487] [2022-03-20 18:01:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:01:53,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:53,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:53,603 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:53,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 18:01:53,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:01:53,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:01:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-03-20 18:01:53,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-03-20 18:01:54,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345653487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:54,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:54,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 7, 7] total 48 [2022-03-20 18:01:54,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1037808031] [2022-03-20 18:01:54,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1037808031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:54,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:54,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 18:01:54,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716899406] [2022-03-20 18:01:54,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:54,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 18:01:54,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:54,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 18:01:54,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:01:54,195 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 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) [2022-03-20 18:01:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:01:56,034 INFO L93 Difference]: Finished difference Result 306 states and 388 transitions. [2022-03-20 18:01:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 18:01:56,034 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 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 99 [2022-03-20 18:01:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:01:56,035 INFO L225 Difference]: With dead ends: 306 [2022-03-20 18:01:56,035 INFO L226 Difference]: Without dead ends: 289 [2022-03-20 18:01:56,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2752, Invalid=4730, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:01:56,036 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 841 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:01:56,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 42 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:01:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-20 18:01:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 102. [2022-03-20 18:01:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:01:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-03-20 18:01:56,081 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2022-03-20 18:01:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:01:56,081 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-03-20 18:01:56,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 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) [2022-03-20 18:01:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-03-20 18:01:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 18:01:56,081 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:01:56,081 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:01:56,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 18:01:56,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-20 18:01:56,299 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:01:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:01:56,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1134117455, now seen corresponding path program 79 times [2022-03-20 18:01:56,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:56,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414343299] [2022-03-20 18:01:56,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:01:56,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:01:56,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1134117455, now seen corresponding path program 80 times [2022-03-20 18:01:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:01:56,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875930900] [2022-03-20 18:01:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:01:56,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:01:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:56,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:01:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:01:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:56,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:01:56,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875930900] [2022-03-20 18:01:56,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875930900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:01:56,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191896223] [2022-03-20 18:01:56,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:01:56,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:01:56,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:01:56,775 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:01:56,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 18:01:56,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:01:56,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:01:56,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 18:01:56,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:01:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:57,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:01:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:01:58,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191896223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:01:58,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:01:58,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-20 18:01:58,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:01:58,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414343299] [2022-03-20 18:01:58,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414343299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:01:58,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:01:58,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 18:01:58,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620080164] [2022-03-20 18:01:58,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:01:58,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 18:01:58,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:01:58,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 18:01:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:01:58,177 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 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) [2022-03-20 18:02:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:00,309 INFO L93 Difference]: Finished difference Result 313 states and 397 transitions. [2022-03-20 18:02:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 18:02:00,309 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 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 101 [2022-03-20 18:02:00,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:00,324 INFO L225 Difference]: With dead ends: 313 [2022-03-20 18:02:00,324 INFO L226 Difference]: Without dead ends: 296 [2022-03-20 18:02:00,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 18:02:00,334 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 982 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:00,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 32 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:02:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-20 18:02:00,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 104. [2022-03-20 18:02:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-03-20 18:02:00,382 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2022-03-20 18:02:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:00,383 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-03-20 18:02:00,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 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) [2022-03-20 18:02:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-03-20 18:02:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 18:02:00,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:00,384 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:00,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-20 18:02:00,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:00,596 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:00,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1649770003, now seen corresponding path program 81 times [2022-03-20 18:02:00,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:00,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2043097431] [2022-03-20 18:02:00,599 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:00,599 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1649770003, now seen corresponding path program 82 times [2022-03-20 18:02:00,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:00,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92129302] [2022-03-20 18:02:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:00,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:01,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:01,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92129302] [2022-03-20 18:02:01,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92129302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:01,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446849529] [2022-03-20 18:02:01,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:02:01,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:01,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:01,241 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:01,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 18:02:01,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:02:01,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 18:02:01,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:01,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:03,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446849529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:03,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:03,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-20 18:02:03,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:03,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2043097431] [2022-03-20 18:02:03,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2043097431] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:03,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:03,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 18:02:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893424334] [2022-03-20 18:02:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:03,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 18:02:03,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 18:02:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:02:03,459 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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) [2022-03-20 18:02:05,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:05,995 INFO L93 Difference]: Finished difference Result 320 states and 406 transitions. [2022-03-20 18:02:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 18:02:05,995 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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 103 [2022-03-20 18:02:05,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:05,996 INFO L225 Difference]: With dead ends: 320 [2022-03-20 18:02:05,996 INFO L226 Difference]: Without dead ends: 303 [2022-03-20 18:02:05,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 18:02:05,998 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1034 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:05,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 37 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:02:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-20 18:02:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 106. [2022-03-20 18:02:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-03-20 18:02:06,044 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 103 [2022-03-20 18:02:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:06,044 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-03-20 18:02:06,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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) [2022-03-20 18:02:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-03-20 18:02:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 18:02:06,045 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:06,045 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:06,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:06,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:06,265 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:06,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1200991733, now seen corresponding path program 83 times [2022-03-20 18:02:06,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:06,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [462840147] [2022-03-20 18:02:06,267 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:06,267 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1200991733, now seen corresponding path program 84 times [2022-03-20 18:02:06,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:06,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499658235] [2022-03-20 18:02:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:06,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:06,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:06,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:06,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499658235] [2022-03-20 18:02:06,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499658235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:06,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619343203] [2022-03-20 18:02:06,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:02:06,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:06,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:06,942 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:06,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 18:02:07,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:02:07,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:02:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-03-20 18:02:07,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-03-20 18:02:07,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619343203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:07,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:07,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 7] total 51 [2022-03-20 18:02:07,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:07,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [462840147] [2022-03-20 18:02:07,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [462840147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:07,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:07,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:02:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566489793] [2022-03-20 18:02:07,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:07,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 18:02:07,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:07,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 18:02:07,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:02:07,516 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 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) [2022-03-20 18:02:10,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:10,294 INFO L93 Difference]: Finished difference Result 327 states and 415 transitions. [2022-03-20 18:02:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 18:02:10,294 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 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 105 [2022-03-20 18:02:10,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:10,295 INFO L225 Difference]: With dead ends: 327 [2022-03-20 18:02:10,295 INFO L226 Difference]: Without dead ends: 310 [2022-03-20 18:02:10,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3151, Invalid=5405, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 18:02:10,297 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1070 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:10,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 27 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:02:10,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-03-20 18:02:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 108. [2022-03-20 18:02:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-03-20 18:02:10,346 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 105 [2022-03-20 18:02:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:10,346 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-03-20 18:02:10,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 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) [2022-03-20 18:02:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-03-20 18:02:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 18:02:10,346 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:10,347 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:10,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:10,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 18:02:10,565 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:10,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:10,566 INFO L85 PathProgramCache]: Analyzing trace with hash 578196137, now seen corresponding path program 85 times [2022-03-20 18:02:10,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:10,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987003859] [2022-03-20 18:02:10,567 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:10,567 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash 578196137, now seen corresponding path program 86 times [2022-03-20 18:02:10,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:10,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789973130] [2022-03-20 18:02:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:10,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:11,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:11,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:11,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789973130] [2022-03-20 18:02:11,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789973130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:11,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816282620] [2022-03-20 18:02:11,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:02:11,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:11,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:11,258 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:11,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 18:02:11,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:02:11,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:11,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 18:02:11,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:11,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:13,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816282620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:13,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:13,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-20 18:02:13,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:13,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987003859] [2022-03-20 18:02:13,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987003859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:13,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:13,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 18:02:13,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916034912] [2022-03-20 18:02:13,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:13,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 18:02:13,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:13,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 18:02:13,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 18:02:13,565 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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) [2022-03-20 18:02:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:16,391 INFO L93 Difference]: Finished difference Result 334 states and 424 transitions. [2022-03-20 18:02:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 18:02:16,391 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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 107 [2022-03-20 18:02:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:16,392 INFO L225 Difference]: With dead ends: 334 [2022-03-20 18:02:16,392 INFO L226 Difference]: Without dead ends: 317 [2022-03-20 18:02:16,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 18:02:16,394 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 924 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:16,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 32 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:02:16,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-20 18:02:16,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 110. [2022-03-20 18:02:16,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:16,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-03-20 18:02:16,446 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2022-03-20 18:02:16,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:16,446 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-03-20 18:02:16,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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) [2022-03-20 18:02:16,446 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-03-20 18:02:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 18:02:16,447 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:16,447 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:16,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:16,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 18:02:16,660 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:16,660 INFO L85 PathProgramCache]: Analyzing trace with hash 980755399, now seen corresponding path program 87 times [2022-03-20 18:02:16,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:16,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [939178714] [2022-03-20 18:02:16,662 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:16,662 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:16,662 INFO L85 PathProgramCache]: Analyzing trace with hash 980755399, now seen corresponding path program 88 times [2022-03-20 18:02:16,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:16,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986297684] [2022-03-20 18:02:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:16,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:17,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:17,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:17,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986297684] [2022-03-20 18:02:17,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986297684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:17,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246967793] [2022-03-20 18:02:17,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:02:17,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:17,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:17,412 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:17,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 18:02:17,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:02:17,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:17,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 18:02:17,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:17,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:19,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246967793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:19,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:19,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-20 18:02:19,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:19,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [939178714] [2022-03-20 18:02:19,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [939178714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:19,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:19,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:02:19,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668290127] [2022-03-20 18:02:19,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:19,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 18:02:19,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:19,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 18:02:19,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 18:02:19,809 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 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) [2022-03-20 18:02:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:22,823 INFO L93 Difference]: Finished difference Result 341 states and 433 transitions. [2022-03-20 18:02:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 18:02:22,824 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 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 109 [2022-03-20 18:02:22,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:22,825 INFO L225 Difference]: With dead ends: 341 [2022-03-20 18:02:22,825 INFO L226 Difference]: Without dead ends: 324 [2022-03-20 18:02:22,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 18:02:22,826 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1004 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:22,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 57 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:02:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-20 18:02:22,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 112. [2022-03-20 18:02:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-03-20 18:02:22,880 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2022-03-20 18:02:22,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:22,880 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-03-20 18:02:22,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 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) [2022-03-20 18:02:22,880 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-03-20 18:02:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 18:02:22,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:22,881 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:22,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:23,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-20 18:02:23,099 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1293149541, now seen corresponding path program 89 times [2022-03-20 18:02:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:23,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [515823055] [2022-03-20 18:02:23,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:23,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:23,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1293149541, now seen corresponding path program 90 times [2022-03-20 18:02:23,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:23,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871715215] [2022-03-20 18:02:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:23,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:23,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:23,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:23,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871715215] [2022-03-20 18:02:23,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871715215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:23,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822145393] [2022-03-20 18:02:23,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:02:23,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:23,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:23,901 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:23,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 18:02:24,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:02:24,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:24,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:02:24,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-03-20 18:02:24,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-03-20 18:02:24,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822145393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:24,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:24,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 54 [2022-03-20 18:02:24,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:24,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [515823055] [2022-03-20 18:02:24,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [515823055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:24,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:24,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 18:02:24,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56936285] [2022-03-20 18:02:24,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:24,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 18:02:24,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 18:02:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:02:24,540 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 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) [2022-03-20 18:02:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:27,607 INFO L93 Difference]: Finished difference Result 348 states and 442 transitions. [2022-03-20 18:02:27,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 18:02:27,607 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 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 111 [2022-03-20 18:02:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:27,608 INFO L225 Difference]: With dead ends: 348 [2022-03-20 18:02:27,608 INFO L226 Difference]: Without dead ends: 331 [2022-03-20 18:02:27,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3577, Invalid=6125, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 18:02:27,609 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1206 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:27,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 37 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:02:27,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-20 18:02:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 114. [2022-03-20 18:02:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:27,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2022-03-20 18:02:27,665 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2022-03-20 18:02:27,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:27,665 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2022-03-20 18:02:27,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 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) [2022-03-20 18:02:27,665 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2022-03-20 18:02:27,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 18:02:27,665 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:27,666 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:27,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:27,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:27,868 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:27,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:27,868 INFO L85 PathProgramCache]: Analyzing trace with hash 856209283, now seen corresponding path program 91 times [2022-03-20 18:02:27,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:27,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [209839040] [2022-03-20 18:02:27,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:27,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:27,874 INFO L85 PathProgramCache]: Analyzing trace with hash 856209283, now seen corresponding path program 92 times [2022-03-20 18:02:27,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:27,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907358494] [2022-03-20 18:02:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:27,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:28,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:28,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:28,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907358494] [2022-03-20 18:02:28,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907358494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:28,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314893216] [2022-03-20 18:02:28,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:02:28,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:28,659 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:28,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 18:02:28,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:02:28,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:28,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 18:02:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:29,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:31,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314893216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:31,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:31,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-20 18:02:31,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:31,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [209839040] [2022-03-20 18:02:31,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [209839040] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:31,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:31,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 18:02:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974184055] [2022-03-20 18:02:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:31,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 18:02:31,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 18:02:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 18:02:31,168 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 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) [2022-03-20 18:02:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:34,095 INFO L93 Difference]: Finished difference Result 355 states and 451 transitions. [2022-03-20 18:02:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 18:02:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 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 113 [2022-03-20 18:02:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:34,096 INFO L225 Difference]: With dead ends: 355 [2022-03-20 18:02:34,096 INFO L226 Difference]: Without dead ends: 338 [2022-03-20 18:02:34,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 18:02:34,097 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1023 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:34,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 37 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:02:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-03-20 18:02:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 116. [2022-03-20 18:02:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-03-20 18:02:34,151 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2022-03-20 18:02:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:34,152 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-03-20 18:02:34,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 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) [2022-03-20 18:02:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-03-20 18:02:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 18:02:34,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:34,152 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:34,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:34,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 18:02:34,370 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:34,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:34,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1863416353, now seen corresponding path program 93 times [2022-03-20 18:02:34,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:34,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [960991157] [2022-03-20 18:02:34,371 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:34,371 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1863416353, now seen corresponding path program 94 times [2022-03-20 18:02:34,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:34,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471212726] [2022-03-20 18:02:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:34,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:35,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:35,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471212726] [2022-03-20 18:02:35,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471212726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:35,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513216379] [2022-03-20 18:02:35,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:02:35,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:35,115 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:35,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 18:02:35,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:02:35,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:35,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 18:02:35,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:35,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:37,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513216379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:37,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:37,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-20 18:02:37,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:37,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [960991157] [2022-03-20 18:02:37,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [960991157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:37,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:37,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 18:02:37,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873435343] [2022-03-20 18:02:37,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:37,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 18:02:37,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:37,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 18:02:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 18:02:37,564 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 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) [2022-03-20 18:02:41,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:41,253 INFO L93 Difference]: Finished difference Result 362 states and 460 transitions. [2022-03-20 18:02:41,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 18:02:41,253 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 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 115 [2022-03-20 18:02:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:41,255 INFO L225 Difference]: With dead ends: 362 [2022-03-20 18:02:41,255 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 18:02:41,255 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 18:02:41,256 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 993 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:41,256 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 62 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:02:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 18:02:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 118. [2022-03-20 18:02:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2022-03-20 18:02:41,315 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 115 [2022-03-20 18:02:41,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:41,315 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2022-03-20 18:02:41,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 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) [2022-03-20 18:02:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2022-03-20 18:02:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 18:02:41,315 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:41,315 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:41,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:41,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 18:02:41,534 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:41,534 INFO L85 PathProgramCache]: Analyzing trace with hash -873198273, now seen corresponding path program 95 times [2022-03-20 18:02:41,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:41,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629415388] [2022-03-20 18:02:41,535 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:41,535 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash -873198273, now seen corresponding path program 96 times [2022-03-20 18:02:41,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:41,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329219735] [2022-03-20 18:02:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:41,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:42,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:42,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:42,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329219735] [2022-03-20 18:02:42,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329219735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:42,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904527639] [2022-03-20 18:02:42,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:02:42,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:42,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:42,371 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:42,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 18:02:42,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:02:42,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:02:42,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-03-20 18:02:42,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-03-20 18:02:43,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904527639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:43,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:43,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 7, 7] total 57 [2022-03-20 18:02:43,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:43,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [629415388] [2022-03-20 18:02:43,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [629415388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:43,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:43,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 18:02:43,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255517934] [2022-03-20 18:02:43,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:43,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 18:02:43,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:43,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 18:02:43,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:02:43,019 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 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) [2022-03-20 18:02:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:47,701 INFO L93 Difference]: Finished difference Result 369 states and 469 transitions. [2022-03-20 18:02:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 18:02:47,701 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 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 117 [2022-03-20 18:02:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:47,703 INFO L225 Difference]: With dead ends: 369 [2022-03-20 18:02:47,703 INFO L226 Difference]: Without dead ends: 352 [2022-03-20 18:02:47,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4030, Invalid=6890, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 18:02:47,704 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1560 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:47,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 27 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:02:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-20 18:02:47,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 120. [2022-03-20 18:02:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-03-20 18:02:47,789 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 117 [2022-03-20 18:02:47,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:47,789 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-03-20 18:02:47,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 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) [2022-03-20 18:02:47,789 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-03-20 18:02:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 18:02:47,790 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:47,790 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:47,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:48,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:48,011 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2055098589, now seen corresponding path program 97 times [2022-03-20 18:02:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1340749836] [2022-03-20 18:02:48,013 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:48,013 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:48,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2055098589, now seen corresponding path program 98 times [2022-03-20 18:02:48,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:48,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372052137] [2022-03-20 18:02:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:48,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:49,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:49,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:49,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372052137] [2022-03-20 18:02:49,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372052137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:49,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569274312] [2022-03-20 18:02:49,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:02:49,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:49,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:49,247 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:49,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 18:02:49,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:02:49,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:49,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 18:02:49,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:49,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:02:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:52,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569274312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:02:52,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:02:52,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-20 18:02:52,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:02:52,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1340749836] [2022-03-20 18:02:52,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1340749836] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:02:52,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:02:52,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 18:02:52,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384855596] [2022-03-20 18:02:52,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:02:52,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 18:02:52,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:52,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 18:02:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 18:02:52,546 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 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) [2022-03-20 18:02:56,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:02:56,295 INFO L93 Difference]: Finished difference Result 376 states and 478 transitions. [2022-03-20 18:02:56,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 18:02:56,296 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 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 119 [2022-03-20 18:02:56,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:02:56,297 INFO L225 Difference]: With dead ends: 376 [2022-03-20 18:02:56,297 INFO L226 Difference]: Without dead ends: 359 [2022-03-20 18:02:56,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 18:02:56,298 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1083 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:02:56,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 47 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:02:56,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-20 18:02:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 122. [2022-03-20 18:02:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:02:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-03-20 18:02:56,362 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2022-03-20 18:02:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:02:56,362 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-03-20 18:02:56,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 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) [2022-03-20 18:02:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-03-20 18:02:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 18:02:56,363 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:02:56,363 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:02:56,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 18:02:56,577 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 18:02:56,578 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:02:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:02:56,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1350163205, now seen corresponding path program 99 times [2022-03-20 18:02:56,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:02:56,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475650680] [2022-03-20 18:02:56,579 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:02:56,579 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:02:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1350163205, now seen corresponding path program 100 times [2022-03-20 18:02:56,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:02:56,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074819055] [2022-03-20 18:02:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:02:56,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:02:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:57,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:02:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:02:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:57,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:02:57,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074819055] [2022-03-20 18:02:57,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074819055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:02:57,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129797435] [2022-03-20 18:02:57,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:02:57,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:02:57,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:02:57,482 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:02:57,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 18:02:57,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:02:57,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:02:57,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 18:02:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:02:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:02:57,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:00,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129797435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:00,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:00,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-20 18:03:00,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:00,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475650680] [2022-03-20 18:03:00,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475650680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:00,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:00,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:03:00,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805437650] [2022-03-20 18:03:00,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:00,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 18:03:00,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:00,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 18:03:00,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:03:00,300 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 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) [2022-03-20 18:03:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:03,947 INFO L93 Difference]: Finished difference Result 383 states and 487 transitions. [2022-03-20 18:03:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 18:03:03,948 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 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 121 [2022-03-20 18:03:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:03,949 INFO L225 Difference]: With dead ends: 383 [2022-03-20 18:03:03,949 INFO L226 Difference]: Without dead ends: 366 [2022-03-20 18:03:03,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 18:03:03,950 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1454 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:03,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1454 Valid, 42 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:03:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-20 18:03:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 124. [2022-03-20 18:03:04,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2022-03-20 18:03:04,022 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2022-03-20 18:03:04,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:04,022 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2022-03-20 18:03:04,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 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) [2022-03-20 18:03:04,022 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2022-03-20 18:03:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 18:03:04,022 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:04,022 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:04,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 18:03:04,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:04,236 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1041667687, now seen corresponding path program 101 times [2022-03-20 18:03:04,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:04,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1359228535] [2022-03-20 18:03:04,237 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:04,237 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1041667687, now seen corresponding path program 102 times [2022-03-20 18:03:04,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:04,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196270554] [2022-03-20 18:03:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:04,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:05,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:05,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:05,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196270554] [2022-03-20 18:03:05,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196270554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:05,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192355893] [2022-03-20 18:03:05,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:03:05,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:05,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:05,280 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:05,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 18:03:05,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:03:05,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:05,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:03:05,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-03-20 18:03:05,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-03-20 18:03:05,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192355893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:05,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:05,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 7, 7] total 60 [2022-03-20 18:03:05,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:05,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1359228535] [2022-03-20 18:03:05,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1359228535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:05,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:05,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 18:03:05,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633094844] [2022-03-20 18:03:05,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:05,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 18:03:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 18:03:05,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=1938, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:03:05,972 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 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) [2022-03-20 18:03:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:10,473 INFO L93 Difference]: Finished difference Result 390 states and 496 transitions. [2022-03-20 18:03:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 18:03:10,473 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 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 123 [2022-03-20 18:03:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:10,475 INFO L225 Difference]: With dead ends: 390 [2022-03-20 18:03:10,475 INFO L226 Difference]: Without dead ends: 373 [2022-03-20 18:03:10,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4510, Invalid=7700, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 18:03:10,475 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1435 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:10,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 37 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:03:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-03-20 18:03:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 126. [2022-03-20 18:03:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-03-20 18:03:10,548 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2022-03-20 18:03:10,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:10,549 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-03-20 18:03:10,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 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) [2022-03-20 18:03:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-03-20 18:03:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 18:03:10,549 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:10,549 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:10,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-20 18:03:10,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-20 18:03:10,768 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash -930218313, now seen corresponding path program 103 times [2022-03-20 18:03:10,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:10,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1940531497] [2022-03-20 18:03:10,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:10,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:10,769 INFO L85 PathProgramCache]: Analyzing trace with hash -930218313, now seen corresponding path program 104 times [2022-03-20 18:03:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:10,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197764298] [2022-03-20 18:03:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:10,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:11,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:11,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:11,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197764298] [2022-03-20 18:03:11,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197764298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:11,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690349516] [2022-03-20 18:03:11,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:03:11,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:11,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:11,733 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:11,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 18:03:12,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:03:12,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:12,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 18:03:12,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:12,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:14,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690349516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:14,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:14,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-20 18:03:14,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:14,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1940531497] [2022-03-20 18:03:14,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1940531497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:14,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:14,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 18:03:14,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519311007] [2022-03-20 18:03:14,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:14,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 18:03:14,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:14,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 18:03:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 18:03:14,383 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 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) [2022-03-20 18:03:18,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:18,173 INFO L93 Difference]: Finished difference Result 397 states and 505 transitions. [2022-03-20 18:03:18,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 18:03:18,173 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 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 125 [2022-03-20 18:03:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:18,174 INFO L225 Difference]: With dead ends: 397 [2022-03-20 18:03:18,174 INFO L226 Difference]: Without dead ends: 380 [2022-03-20 18:03:18,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 18:03:18,175 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:18,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 47 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:03:18,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-20 18:03:18,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 128. [2022-03-20 18:03:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-03-20 18:03:18,255 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2022-03-20 18:03:18,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:18,255 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-03-20 18:03:18,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 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) [2022-03-20 18:03:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-03-20 18:03:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 18:03:18,256 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:18,256 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:18,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-20 18:03:18,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-20 18:03:18,473 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:18,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552299, now seen corresponding path program 105 times [2022-03-20 18:03:18,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:18,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [521974150] [2022-03-20 18:03:18,475 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:18,475 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552299, now seen corresponding path program 106 times [2022-03-20 18:03:18,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:18,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894366002] [2022-03-20 18:03:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:18,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:19,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:19,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:19,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894366002] [2022-03-20 18:03:19,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894366002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:19,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442081486] [2022-03-20 18:03:19,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:03:19,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:19,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:19,462 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:19,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 18:03:19,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:03:19,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 18:03:19,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:19,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:21,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442081486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:21,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:21,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-20 18:03:21,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:21,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [521974150] [2022-03-20 18:03:21,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [521974150] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:21,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:21,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 18:03:21,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695939157] [2022-03-20 18:03:21,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:21,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 18:03:21,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:21,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 18:03:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 18:03:21,706 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 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) [2022-03-20 18:03:26,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:26,033 INFO L93 Difference]: Finished difference Result 404 states and 514 transitions. [2022-03-20 18:03:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 18:03:26,033 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 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 127 [2022-03-20 18:03:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:26,034 INFO L225 Difference]: With dead ends: 404 [2022-03-20 18:03:26,034 INFO L226 Difference]: Without dead ends: 387 [2022-03-20 18:03:26,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 18:03:26,035 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1301 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:26,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 37 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:03:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-20 18:03:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 130. [2022-03-20 18:03:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-03-20 18:03:26,112 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2022-03-20 18:03:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:26,112 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-03-20 18:03:26,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 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) [2022-03-20 18:03:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-03-20 18:03:26,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 18:03:26,113 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:26,113 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:26,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 18:03:26,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:26,327 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash 39492211, now seen corresponding path program 107 times [2022-03-20 18:03:26,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:26,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1538168578] [2022-03-20 18:03:26,329 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:26,329 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash 39492211, now seen corresponding path program 108 times [2022-03-20 18:03:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:26,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681177574] [2022-03-20 18:03:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:26,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:27,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:27,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:27,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681177574] [2022-03-20 18:03:27,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681177574] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:27,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332313174] [2022-03-20 18:03:27,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:03:27,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:27,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:27,384 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:27,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 18:03:27,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:03:27,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:27,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:03:27,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-03-20 18:03:27,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-03-20 18:03:28,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332313174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:28,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:28,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 7] total 63 [2022-03-20 18:03:28,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:28,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1538168578] [2022-03-20 18:03:28,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1538168578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:28,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:28,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 18:03:28,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919477191] [2022-03-20 18:03:28,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:28,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 18:03:28,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 18:03:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1776, Invalid=2130, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 18:03:28,044 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 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) [2022-03-20 18:03:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:32,605 INFO L93 Difference]: Finished difference Result 411 states and 523 transitions. [2022-03-20 18:03:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 18:03:32,605 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 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 129 [2022-03-20 18:03:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:32,606 INFO L225 Difference]: With dead ends: 411 [2022-03-20 18:03:32,606 INFO L226 Difference]: Without dead ends: 394 [2022-03-20 18:03:32,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5017, Invalid=8555, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 18:03:32,607 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1238 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:32,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 37 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:03:32,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-03-20 18:03:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 132. [2022-03-20 18:03:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-03-20 18:03:32,685 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2022-03-20 18:03:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:32,685 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-03-20 18:03:32,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 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) [2022-03-20 18:03:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-03-20 18:03:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 18:03:32,686 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:32,686 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:32,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 18:03:32,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:32,904 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1317641967, now seen corresponding path program 109 times [2022-03-20 18:03:32,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:32,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1388056541] [2022-03-20 18:03:32,905 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:32,905 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1317641967, now seen corresponding path program 110 times [2022-03-20 18:03:32,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:32,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626130329] [2022-03-20 18:03:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:33,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:33,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:33,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626130329] [2022-03-20 18:03:33,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626130329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:33,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429322484] [2022-03-20 18:03:33,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:03:33,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:33,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:33,916 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:33,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 18:03:34,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:03:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:34,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 18:03:34,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:34,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:36,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429322484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:36,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:36,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-20 18:03:36,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:36,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1388056541] [2022-03-20 18:03:36,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1388056541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:36,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:36,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 18:03:36,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447109031] [2022-03-20 18:03:36,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:36,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 18:03:36,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:36,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 18:03:36,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 18:03:36,974 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 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) [2022-03-20 18:03:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:42,274 INFO L93 Difference]: Finished difference Result 418 states and 532 transitions. [2022-03-20 18:03:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 18:03:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 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 131 [2022-03-20 18:03:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:42,276 INFO L225 Difference]: With dead ends: 418 [2022-03-20 18:03:42,276 INFO L226 Difference]: Without dead ends: 401 [2022-03-20 18:03:42,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 18:03:42,277 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1614 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:42,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1614 Valid, 27 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:03:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-03-20 18:03:42,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 134. [2022-03-20 18:03:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 129 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-03-20 18:03:42,363 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 131 [2022-03-20 18:03:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:42,363 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-03-20 18:03:42,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 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) [2022-03-20 18:03:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-03-20 18:03:42,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 18:03:42,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:42,364 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:42,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 18:03:42,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:42,579 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:42,580 INFO L85 PathProgramCache]: Analyzing trace with hash 146470959, now seen corresponding path program 111 times [2022-03-20 18:03:42,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:42,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1684383538] [2022-03-20 18:03:42,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:42,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash 146470959, now seen corresponding path program 112 times [2022-03-20 18:03:42,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:42,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777167814] [2022-03-20 18:03:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:42,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:43,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:43,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:43,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777167814] [2022-03-20 18:03:43,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777167814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:43,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413245780] [2022-03-20 18:03:43,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:03:43,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:43,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:43,698 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:43,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 18:03:44,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:03:44,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 18:03:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:44,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:46,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413245780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:46,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:46,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-20 18:03:46,839 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:46,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1684383538] [2022-03-20 18:03:46,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1684383538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:46,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:46,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 18:03:46,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972609385] [2022-03-20 18:03:46,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:46,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 18:03:46,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:46,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 18:03:46,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 18:03:46,842 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 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) [2022-03-20 18:03:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:51,578 INFO L93 Difference]: Finished difference Result 425 states and 541 transitions. [2022-03-20 18:03:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 18:03:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 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 133 [2022-03-20 18:03:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:51,580 INFO L225 Difference]: With dead ends: 425 [2022-03-20 18:03:51,580 INFO L226 Difference]: Without dead ends: 408 [2022-03-20 18:03:51,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 18:03:51,581 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1328 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:51,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1328 Valid, 37 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:03:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-03-20 18:03:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 136. [2022-03-20 18:03:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2022-03-20 18:03:51,667 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2022-03-20 18:03:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:51,667 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2022-03-20 18:03:51,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 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) [2022-03-20 18:03:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2022-03-20 18:03:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 18:03:51,667 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:51,668 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:51,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-20 18:03:51,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 18:03:51,884 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:51,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1590280243, now seen corresponding path program 113 times [2022-03-20 18:03:51,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:51,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [874498546] [2022-03-20 18:03:51,885 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:51,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1590280243, now seen corresponding path program 114 times [2022-03-20 18:03:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:51,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795221230] [2022-03-20 18:03:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:51,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:52,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:03:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:03:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:03:52,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:03:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795221230] [2022-03-20 18:03:52,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795221230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:03:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559715888] [2022-03-20 18:03:52,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:03:52,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:03:52,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:03:52,867 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:03:52,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 18:03:53,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:03:53,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:03:53,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:03:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:03:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-03-20 18:03:53,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:03:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-03-20 18:03:53,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559715888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:03:53,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:03:53,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 66 [2022-03-20 18:03:53,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:03:53,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [874498546] [2022-03-20 18:03:53,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [874498546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:03:53,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:03:53,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 18:03:53,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755866558] [2022-03-20 18:03:53,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:03:53,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 18:03:53,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:53,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 18:03:53,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1959, Invalid=2331, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 18:03:53,579 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 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) [2022-03-20 18:03:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:03:59,393 INFO L93 Difference]: Finished difference Result 432 states and 550 transitions. [2022-03-20 18:03:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 18:03:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 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 135 [2022-03-20 18:03:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:03:59,395 INFO L225 Difference]: With dead ends: 432 [2022-03-20 18:03:59,395 INFO L226 Difference]: Without dead ends: 415 [2022-03-20 18:03:59,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5551, Invalid=9455, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 18:03:59,396 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1252 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:03:59,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 47 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:03:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-20 18:03:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 138. [2022-03-20 18:03:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:03:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-03-20 18:03:59,494 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2022-03-20 18:03:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:03:59,494 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-03-20 18:03:59,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 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) [2022-03-20 18:03:59,494 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-03-20 18:03:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 18:03:59,494 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:03:59,495 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:03:59,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 18:03:59,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 18:03:59,712 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:03:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:03:59,712 INFO L85 PathProgramCache]: Analyzing trace with hash 134092779, now seen corresponding path program 115 times [2022-03-20 18:03:59,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:03:59,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [424572273] [2022-03-20 18:03:59,713 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:03:59,713 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:03:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash 134092779, now seen corresponding path program 116 times [2022-03-20 18:03:59,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:03:59,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58951323] [2022-03-20 18:03:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:03:59,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:03:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:00,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:00,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:00,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58951323] [2022-03-20 18:04:00,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58951323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:00,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298812814] [2022-03-20 18:04:00,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:04:00,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:00,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:00,825 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:00,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 18:04:01,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:04:01,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:01,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 18:04:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:01,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:03,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298812814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:03,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:03,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-20 18:04:03,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:03,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [424572273] [2022-03-20 18:04:03,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [424572273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:03,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:03,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 18:04:03,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243149471] [2022-03-20 18:04:03,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:03,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 18:04:03,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:03,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 18:04:03,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 18:04:03,242 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 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) [2022-03-20 18:04:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:09,023 INFO L93 Difference]: Finished difference Result 439 states and 559 transitions. [2022-03-20 18:04:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 18:04:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 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 137 [2022-03-20 18:04:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:09,025 INFO L225 Difference]: With dead ends: 439 [2022-03-20 18:04:09,025 INFO L226 Difference]: Without dead ends: 422 [2022-03-20 18:04:09,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 18:04:09,026 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1574 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:09,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 22 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:04:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-03-20 18:04:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 140. [2022-03-20 18:04:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-03-20 18:04:09,122 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2022-03-20 18:04:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:09,122 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-03-20 18:04:09,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 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) [2022-03-20 18:04:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-03-20 18:04:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 18:04:09,123 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:09,123 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:09,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 18:04:09,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:09,341 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:09,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:09,341 INFO L85 PathProgramCache]: Analyzing trace with hash -600809335, now seen corresponding path program 117 times [2022-03-20 18:04:09,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:09,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1123955535] [2022-03-20 18:04:09,342 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:09,342 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash -600809335, now seen corresponding path program 118 times [2022-03-20 18:04:09,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:09,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536923878] [2022-03-20 18:04:09,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:09,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:10,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:10,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:10,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536923878] [2022-03-20 18:04:10,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536923878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:10,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209474551] [2022-03-20 18:04:10,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:04:10,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:10,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:10,536 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:10,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 18:04:10,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:04:10,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:10,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 18:04:10,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:11,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:13,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209474551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:13,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:13,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-20 18:04:13,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:13,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1123955535] [2022-03-20 18:04:13,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1123955535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:13,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:13,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 18:04:13,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130137468] [2022-03-20 18:04:13,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:13,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 18:04:13,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:13,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 18:04:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 18:04:13,826 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 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) [2022-03-20 18:04:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:19,576 INFO L93 Difference]: Finished difference Result 446 states and 568 transitions. [2022-03-20 18:04:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 18:04:19,577 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 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 139 [2022-03-20 18:04:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:19,578 INFO L225 Difference]: With dead ends: 446 [2022-03-20 18:04:19,578 INFO L226 Difference]: Without dead ends: 429 [2022-03-20 18:04:19,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 18:04:19,579 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1403 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:19,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1403 Valid, 42 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:04:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-03-20 18:04:19,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 142. [2022-03-20 18:04:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2022-03-20 18:04:19,674 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2022-03-20 18:04:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:19,674 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2022-03-20 18:04:19,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 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) [2022-03-20 18:04:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2022-03-20 18:04:19,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 18:04:19,676 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:19,676 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:19,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-20 18:04:19,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:19,879 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:19,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1827862951, now seen corresponding path program 119 times [2022-03-20 18:04:19,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:19,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1619994890] [2022-03-20 18:04:19,880 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:19,880 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:19,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1827862951, now seen corresponding path program 120 times [2022-03-20 18:04:19,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:19,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138694025] [2022-03-20 18:04:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:19,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:21,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:21,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:21,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138694025] [2022-03-20 18:04:21,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138694025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:21,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169172940] [2022-03-20 18:04:21,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:04:21,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:21,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:21,073 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:21,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 18:04:21,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:04:21,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:04:21,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-03-20 18:04:21,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-03-20 18:04:21,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169172940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:21,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:21,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 7, 7] total 69 [2022-03-20 18:04:21,891 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:21,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1619994890] [2022-03-20 18:04:21,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1619994890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:21,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:21,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 18:04:21,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143938846] [2022-03-20 18:04:21,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:21,892 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 18:04:21,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 18:04:21,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2151, Invalid=2541, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 18:04:21,893 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 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) [2022-03-20 18:04:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:27,982 INFO L93 Difference]: Finished difference Result 453 states and 577 transitions. [2022-03-20 18:04:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 18:04:27,982 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 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 141 [2022-03-20 18:04:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:27,983 INFO L225 Difference]: With dead ends: 453 [2022-03-20 18:04:27,983 INFO L226 Difference]: Without dead ends: 436 [2022-03-20 18:04:27,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6112, Invalid=10400, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 18:04:27,984 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1884 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1884 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:27,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1884 Valid, 37 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:04:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-03-20 18:04:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 144. [2022-03-20 18:04:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2022-03-20 18:04:28,084 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 141 [2022-03-20 18:04:28,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:28,084 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2022-03-20 18:04:28,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 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) [2022-03-20 18:04:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2022-03-20 18:04:28,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:04:28,085 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:28,085 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:28,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 18:04:28,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:28,293 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:28,293 INFO L85 PathProgramCache]: Analyzing trace with hash -680279227, now seen corresponding path program 121 times [2022-03-20 18:04:28,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:28,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554537748] [2022-03-20 18:04:28,294 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:28,294 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:28,294 INFO L85 PathProgramCache]: Analyzing trace with hash -680279227, now seen corresponding path program 122 times [2022-03-20 18:04:28,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:28,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041048124] [2022-03-20 18:04:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:28,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:29,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:29,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:29,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041048124] [2022-03-20 18:04:29,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041048124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:29,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136693321] [2022-03-20 18:04:29,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:04:29,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:29,417 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:29,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 18:04:29,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:04:29,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:29,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 18:04:29,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:29,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:32,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136693321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:32,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:32,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-20 18:04:32,104 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:32,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554537748] [2022-03-20 18:04:32,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554537748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:32,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:32,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 18:04:32,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876098671] [2022-03-20 18:04:32,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:32,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 18:04:32,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:32,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 18:04:32,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 18:04:32,111 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 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) [2022-03-20 18:04:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:38,314 INFO L93 Difference]: Finished difference Result 460 states and 586 transitions. [2022-03-20 18:04:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 18:04:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 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 143 [2022-03-20 18:04:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:38,315 INFO L225 Difference]: With dead ends: 460 [2022-03-20 18:04:38,315 INFO L226 Difference]: Without dead ends: 443 [2022-03-20 18:04:38,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 18:04:38,317 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1379 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:38,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 52 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:04:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-20 18:04:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 146. [2022-03-20 18:04:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 141 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2022-03-20 18:04:38,419 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 143 [2022-03-20 18:04:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:38,419 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2022-03-20 18:04:38,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 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) [2022-03-20 18:04:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2022-03-20 18:04:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 18:04:38,420 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:38,420 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:38,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 18:04:38,629 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:38,629 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:38,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1528259229, now seen corresponding path program 123 times [2022-03-20 18:04:38,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:38,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [55775427] [2022-03-20 18:04:38,631 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:38,631 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1528259229, now seen corresponding path program 124 times [2022-03-20 18:04:38,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:38,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117486661] [2022-03-20 18:04:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:38,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:39,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:39,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:39,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117486661] [2022-03-20 18:04:39,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117486661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:39,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799943020] [2022-03-20 18:04:39,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:04:39,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:39,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:39,887 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:39,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 18:04:40,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:04:40,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:40,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 18:04:40,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:40,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:43,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799943020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:43,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:43,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-20 18:04:43,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:43,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [55775427] [2022-03-20 18:04:43,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [55775427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:43,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:43,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 18:04:43,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114368501] [2022-03-20 18:04:43,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:43,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 18:04:43,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:43,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 18:04:43,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 18:04:43,919 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 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) [2022-03-20 18:04:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:04:52,104 INFO L93 Difference]: Finished difference Result 467 states and 595 transitions. [2022-03-20 18:04:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 18:04:52,111 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 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 145 [2022-03-20 18:04:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:04:52,113 INFO L225 Difference]: With dead ends: 467 [2022-03-20 18:04:52,113 INFO L226 Difference]: Without dead ends: 450 [2022-03-20 18:04:52,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 18:04:52,115 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1882 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:04:52,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1882 Valid, 27 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 18:04:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-03-20 18:04:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 148. [2022-03-20 18:04:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:04:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2022-03-20 18:04:52,251 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2022-03-20 18:04:52,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:04:52,251 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2022-03-20 18:04:52,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 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) [2022-03-20 18:04:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2022-03-20 18:04:52,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 18:04:52,252 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:04:52,252 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:04:52,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 18:04:52,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-20 18:04:52,472 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:04:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:04:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash -393254911, now seen corresponding path program 125 times [2022-03-20 18:04:52,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:52,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1201032355] [2022-03-20 18:04:52,475 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:04:52,475 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:04:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash -393254911, now seen corresponding path program 126 times [2022-03-20 18:04:52,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:04:52,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680214825] [2022-03-20 18:04:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:04:52,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:04:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:56,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:04:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:04:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:04:56,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:04:56,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680214825] [2022-03-20 18:04:56,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680214825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:04:56,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794300660] [2022-03-20 18:04:56,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:04:56,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:04:56,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:04:56,145 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:04:56,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 18:04:56,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:04:56,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:04:56,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:04:56,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:04:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-03-20 18:04:56,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:04:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-03-20 18:04:57,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794300660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:04:57,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:04:57,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 7, 7] total 72 [2022-03-20 18:04:57,115 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:04:57,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1201032355] [2022-03-20 18:04:57,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1201032355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:04:57,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:04:57,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 18:04:57,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912158682] [2022-03-20 18:04:57,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:04:57,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 18:04:57,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:04:57,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 18:04:57,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=2760, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:04:57,118 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 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) [2022-03-20 18:05:05,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:05:05,187 INFO L93 Difference]: Finished difference Result 474 states and 604 transitions. [2022-03-20 18:05:05,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 18:05:05,188 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 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 147 [2022-03-20 18:05:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:05:05,190 INFO L225 Difference]: With dead ends: 474 [2022-03-20 18:05:05,190 INFO L226 Difference]: Without dead ends: 457 [2022-03-20 18:05:05,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6700, Invalid=11390, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 18:05:05,191 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1476 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:05:05,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 47 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:05:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-03-20 18:05:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 150. [2022-03-20 18:05:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:05:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-03-20 18:05:05,364 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 147 [2022-03-20 18:05:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:05:05,364 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-03-20 18:05:05,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 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) [2022-03-20 18:05:05,364 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-03-20 18:05:05,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 18:05:05,365 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:05:05,365 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:05:05,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-20 18:05:05,582 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:05:05,583 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:05:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:05:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash -575798497, now seen corresponding path program 127 times [2022-03-20 18:05:05,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:05,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [404312806] [2022-03-20 18:05:05,584 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:05:05,584 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:05:05,584 INFO L85 PathProgramCache]: Analyzing trace with hash -575798497, now seen corresponding path program 128 times [2022-03-20 18:05:05,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:05:05,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301300981] [2022-03-20 18:05:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:05:05,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:05:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:06,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:05:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:05:06,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:05:06,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301300981] [2022-03-20 18:05:06,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301300981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:05:06,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374952519] [2022-03-20 18:05:06,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:05:06,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:05:06,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:05:06,974 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:05:06,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 18:05:07,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:05:07,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:05:07,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 18:05:07,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:05:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:05:07,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:05:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:05:11,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374952519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:05:11,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:05:11,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-20 18:05:11,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:05:11,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [404312806] [2022-03-20 18:05:11,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [404312806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:05:11,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:05:11,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 18:05:11,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804259486] [2022-03-20 18:05:11,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:05:11,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 18:05:11,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:11,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 18:05:11,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 18:05:11,700 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 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) [2022-03-20 18:05:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:05:20,140 INFO L93 Difference]: Finished difference Result 481 states and 613 transitions. [2022-03-20 18:05:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 18:05:20,141 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 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 149 [2022-03-20 18:05:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:05:20,142 INFO L225 Difference]: With dead ends: 481 [2022-03-20 18:05:20,142 INFO L226 Difference]: Without dead ends: 464 [2022-03-20 18:05:20,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 18:05:20,145 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1568 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:05:20,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 52 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:05:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-03-20 18:05:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 152. [2022-03-20 18:05:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.034013605442177) internal successors, (152), 147 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:05:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-03-20 18:05:20,283 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2022-03-20 18:05:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:05:20,283 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-03-20 18:05:20,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 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) [2022-03-20 18:05:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-03-20 18:05:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 18:05:20,284 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:05:20,284 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:05:20,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-20 18:05:20,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-20 18:05:20,504 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:05:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:05:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash 93474493, now seen corresponding path program 129 times [2022-03-20 18:05:20,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:20,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [499929781] [2022-03-20 18:05:20,506 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:05:20,506 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:05:20,506 INFO L85 PathProgramCache]: Analyzing trace with hash 93474493, now seen corresponding path program 130 times [2022-03-20 18:05:20,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:05:20,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137300873] [2022-03-20 18:05:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:05:20,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:05:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:21,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:05:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:05:21,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:05:21,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137300873] [2022-03-20 18:05:21,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137300873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:05:21,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754195938] [2022-03-20 18:05:21,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:05:21,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:05:21,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:05:21,934 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:05:21,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 18:05:22,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:05:22,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:05:22,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 18:05:22,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:05:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:05:22,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:05:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:05:26,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754195938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:05:26,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:05:26,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-20 18:05:26,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:05:26,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [499929781] [2022-03-20 18:05:26,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [499929781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:05:26,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:05:26,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 18:05:26,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927967484] [2022-03-20 18:05:26,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:05:26,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 18:05:26,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:26,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 18:05:26,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 18:05:26,510 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 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) [2022-03-20 18:05:34,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:05:34,587 INFO L93 Difference]: Finished difference Result 488 states and 622 transitions. [2022-03-20 18:05:34,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 18:05:34,587 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 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 151 [2022-03-20 18:05:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:05:34,588 INFO L225 Difference]: With dead ends: 488 [2022-03-20 18:05:34,588 INFO L226 Difference]: Without dead ends: 471 [2022-03-20 18:05:34,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 18:05:34,590 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1648 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:05:34,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1648 Valid, 42 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:05:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-03-20 18:05:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 154. [2022-03-20 18:05:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:05:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2022-03-20 18:05:34,718 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2022-03-20 18:05:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:05:34,719 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2022-03-20 18:05:34,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 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) [2022-03-20 18:05:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2022-03-20 18:05:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 18:05:34,719 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:05:34,719 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:05:34,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-20 18:05:34,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 18:05:34,939 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:05:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:05:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash -980276517, now seen corresponding path program 131 times [2022-03-20 18:05:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:34,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [391115465] [2022-03-20 18:05:34,940 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:05:34,940 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:05:34,940 INFO L85 PathProgramCache]: Analyzing trace with hash -980276517, now seen corresponding path program 132 times [2022-03-20 18:05:34,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:05:34,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523267090] [2022-03-20 18:05:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:05:34,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:05:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:36,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:05:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:05:36,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:05:36,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523267090] [2022-03-20 18:05:36,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523267090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:05:36,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449595336] [2022-03-20 18:05:36,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:05:36,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:05:36,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:05:36,083 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:05:36,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 18:05:36,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:05:36,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:05:36,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:05:36,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:05:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-03-20 18:05:36,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:05:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-03-20 18:05:36,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449595336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:05:36,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:05:36,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 75 [2022-03-20 18:05:36,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:05:36,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [391115465] [2022-03-20 18:05:36,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [391115465] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:05:36,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:05:36,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 18:05:36,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703566329] [2022-03-20 18:05:36,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:05:36,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 18:05:36,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:36,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 18:05:36,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2562, Invalid=2988, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 18:05:36,979 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 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) [2022-03-20 18:05:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:05:45,287 INFO L93 Difference]: Finished difference Result 495 states and 631 transitions. [2022-03-20 18:05:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 18:05:45,289 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 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 153 [2022-03-20 18:05:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:05:45,291 INFO L225 Difference]: With dead ends: 495 [2022-03-20 18:05:45,291 INFO L226 Difference]: Without dead ends: 478 [2022-03-20 18:05:45,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7315, Invalid=12425, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 18:05:45,292 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1462 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:05:45,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 57 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:05:45,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-03-20 18:05:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 156. [2022-03-20 18:05:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:05:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-03-20 18:05:45,430 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 153 [2022-03-20 18:05:45,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:05:45,430 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-03-20 18:05:45,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 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) [2022-03-20 18:05:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-03-20 18:05:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 18:05:45,431 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:05:45,431 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:05:45,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 18:05:45,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-20 18:05:45,649 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:05:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:05:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2062846087, now seen corresponding path program 133 times [2022-03-20 18:05:45,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:45,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1034668973] [2022-03-20 18:05:45,651 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:05:45,651 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:05:45,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2062846087, now seen corresponding path program 134 times [2022-03-20 18:05:45,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:05:45,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643657356] [2022-03-20 18:05:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:05:45,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:05:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:46,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:05:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:05:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:05:46,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:05:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643657356] [2022-03-20 18:05:46,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643657356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:05:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014365233] [2022-03-20 18:05:46,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:05:46,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:05:46,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:05:46,518 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:05:46,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 18:05:46,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:05:46,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:05:46,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 18:05:46,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:05:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:05:47,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:05:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:05:50,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014365233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:05:50,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:05:50,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-20 18:05:50,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:05:50,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1034668973] [2022-03-20 18:05:50,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1034668973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:05:50,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:05:50,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 18:05:50,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143201042] [2022-03-20 18:05:50,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:05:50,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 18:05:50,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:50,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 18:05:50,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 18:05:50,413 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 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) [2022-03-20 18:05:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:05:58,967 INFO L93 Difference]: Finished difference Result 502 states and 640 transitions. [2022-03-20 18:05:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 18:05:58,967 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 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 155 [2022-03-20 18:05:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:05:58,968 INFO L225 Difference]: With dead ends: 502 [2022-03-20 18:05:58,968 INFO L226 Difference]: Without dead ends: 485 [2022-03-20 18:05:58,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 18:05:58,970 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1610 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:05:58,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 42 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:05:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-20 18:05:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 158. [2022-03-20 18:05:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:05:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2022-03-20 18:05:59,113 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 155 [2022-03-20 18:05:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:05:59,113 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2022-03-20 18:05:59,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 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) [2022-03-20 18:05:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2022-03-20 18:05:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 18:05:59,114 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:05:59,114 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:05:59,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 18:05:59,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-20 18:05:59,334 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:05:59,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:05:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1264850071, now seen corresponding path program 135 times [2022-03-20 18:05:59,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:05:59,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1344869989] [2022-03-20 18:05:59,335 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:05:59,335 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:05:59,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1264850071, now seen corresponding path program 136 times [2022-03-20 18:05:59,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:05:59,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520662372] [2022-03-20 18:05:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:05:59,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:05:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:00,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:06:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:06:00,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:06:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520662372] [2022-03-20 18:06:00,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520662372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:06:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396201462] [2022-03-20 18:06:00,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:06:00,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:00,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:06:00,819 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:06:00,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 18:06:01,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:06:01,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:06:01,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 18:06:01,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:06:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:06:01,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:06:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:06:05,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396201462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:06:05,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:06:05,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-20 18:06:05,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:06:05,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1344869989] [2022-03-20 18:06:05,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1344869989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:06:05,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:06:05,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 18:06:05,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439717141] [2022-03-20 18:06:05,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:06:05,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 18:06:05,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:05,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 18:06:05,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 18:06:05,054 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 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) [2022-03-20 18:06:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:06:14,491 INFO L93 Difference]: Finished difference Result 509 states and 649 transitions. [2022-03-20 18:06:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 18:06:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 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 157 [2022-03-20 18:06:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:06:14,493 INFO L225 Difference]: With dead ends: 509 [2022-03-20 18:06:14,493 INFO L226 Difference]: Without dead ends: 492 [2022-03-20 18:06:14,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 18:06:14,495 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1556 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:06:14,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 47 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:06:14,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-20 18:06:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 160. [2022-03-20 18:06:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2022-03-20 18:06:14,648 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 157 [2022-03-20 18:06:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:06:14,648 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2022-03-20 18:06:14,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 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) [2022-03-20 18:06:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2022-03-20 18:06:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 18:06:14,649 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:06:14,649 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:06:14,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 18:06:14,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:14,868 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:06:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:06:14,869 INFO L85 PathProgramCache]: Analyzing trace with hash -569777611, now seen corresponding path program 137 times [2022-03-20 18:06:14,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:14,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1709111388] [2022-03-20 18:06:14,870 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:06:14,870 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:06:14,870 INFO L85 PathProgramCache]: Analyzing trace with hash -569777611, now seen corresponding path program 138 times [2022-03-20 18:06:14,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:06:14,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839643098] [2022-03-20 18:06:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:06:14,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:06:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:16,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:06:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:06:16,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:06:16,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839643098] [2022-03-20 18:06:16,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839643098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:06:16,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648280207] [2022-03-20 18:06:16,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:06:16,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:16,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:06:16,271 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:06:16,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 18:06:16,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:06:16,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:06:16,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:06:16,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:06:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-20 18:06:16,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:06:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-20 18:06:16,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648280207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:06:16,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:06:16,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 7, 7] total 78 [2022-03-20 18:06:16,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:06:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1709111388] [2022-03-20 18:06:16,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1709111388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:06:16,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:06:16,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 18:06:16,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016400550] [2022-03-20 18:06:16,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:06:16,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 18:06:16,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:16,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 18:06:16,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2781, Invalid=3225, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 18:06:16,968 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 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) [2022-03-20 18:06:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:06:25,718 INFO L93 Difference]: Finished difference Result 516 states and 658 transitions. [2022-03-20 18:06:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 18:06:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 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 159 [2022-03-20 18:06:25,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:06:25,720 INFO L225 Difference]: With dead ends: 516 [2022-03-20 18:06:25,720 INFO L226 Difference]: Without dead ends: 499 [2022-03-20 18:06:25,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7957, Invalid=13505, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 18:06:25,721 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2136 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:06:25,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2136 Valid, 32 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:06:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-20 18:06:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 162. [2022-03-20 18:06:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-03-20 18:06:25,865 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2022-03-20 18:06:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:06:25,865 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-03-20 18:06:25,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 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) [2022-03-20 18:06:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-03-20 18:06:25,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 18:06:25,866 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:06:25,866 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:06:25,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-20 18:06:26,070 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:26,071 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:06:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:06:26,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1584578643, now seen corresponding path program 139 times [2022-03-20 18:06:26,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:26,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [563255593] [2022-03-20 18:06:26,072 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:06:26,072 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:06:26,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1584578643, now seen corresponding path program 140 times [2022-03-20 18:06:26,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:06:26,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574324758] [2022-03-20 18:06:26,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:06:26,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:06:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:27,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:06:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:06:27,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:06:27,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574324758] [2022-03-20 18:06:27,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574324758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:06:27,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871426820] [2022-03-20 18:06:27,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:06:27,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:27,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:06:27,639 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:06:27,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 18:06:28,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:06:28,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:06:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 18:06:28,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:06:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:06:28,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:06:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:06:32,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871426820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:06:32,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:06:32,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-03-20 18:06:32,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:06:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [563255593] [2022-03-20 18:06:32,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [563255593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:06:32,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:06:32,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 18:06:32,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261266606] [2022-03-20 18:06:32,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:06:32,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 18:06:32,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:32,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 18:06:32,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 18:06:32,996 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 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) [2022-03-20 18:06:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:06:42,696 INFO L93 Difference]: Finished difference Result 523 states and 667 transitions. [2022-03-20 18:06:42,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 18:06:42,696 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 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 161 [2022-03-20 18:06:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:06:42,698 INFO L225 Difference]: With dead ends: 523 [2022-03-20 18:06:42,698 INFO L226 Difference]: Without dead ends: 506 [2022-03-20 18:06:42,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-03-20 18:06:42,700 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1645 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:06:42,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1645 Valid, 37 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:06:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-03-20 18:06:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 164. [2022-03-20 18:06:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 159 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-03-20 18:06:42,838 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2022-03-20 18:06:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:06:42,838 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-03-20 18:06:42,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 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) [2022-03-20 18:06:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-03-20 18:06:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 18:06:42,839 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:06:42,839 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:06:42,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-20 18:06:43,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:43,058 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:06:43,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:06:43,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1746702065, now seen corresponding path program 141 times [2022-03-20 18:06:43,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:43,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [401844744] [2022-03-20 18:06:43,059 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:06:43,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:06:43,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1746702065, now seen corresponding path program 142 times [2022-03-20 18:06:43,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:06:43,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891369654] [2022-03-20 18:06:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:06:43,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:06:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:44,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:06:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:06:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:06:44,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:06:44,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891369654] [2022-03-20 18:06:44,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891369654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:06:44,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931743982] [2022-03-20 18:06:44,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:06:44,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:06:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:06:44,540 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:06:44,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 18:06:45,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:06:45,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:06:45,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 18:06:45,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:06:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:06:45,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:06:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:06:49,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931743982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:06:49,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:06:49,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-20 18:06:49,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:06:49,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [401844744] [2022-03-20 18:06:49,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [401844744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:06:49,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:06:49,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 18:06:49,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630014530] [2022-03-20 18:06:49,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:06:49,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 18:06:49,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:49,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 18:06:49,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 18:06:49,326 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 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) [2022-03-20 18:06:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:06:59,229 INFO L93 Difference]: Finished difference Result 530 states and 676 transitions. [2022-03-20 18:06:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 18:06:59,230 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 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 163 [2022-03-20 18:06:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:06:59,231 INFO L225 Difference]: With dead ends: 530 [2022-03-20 18:06:59,231 INFO L226 Difference]: Without dead ends: 513 [2022-03-20 18:06:59,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 18:06:59,233 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2006 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:06:59,233 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 37 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:06:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-20 18:06:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 166. [2022-03-20 18:06:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.031055900621118) internal successors, (166), 161 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:06:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2022-03-20 18:06:59,401 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 163 [2022-03-20 18:06:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:06:59,402 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2022-03-20 18:06:59,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 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) [2022-03-20 18:06:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2022-03-20 18:06:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 18:06:59,415 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:06:59,415 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:06:59,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-20 18:06:59,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-20 18:06:59,637 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:06:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:06:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1366479345, now seen corresponding path program 143 times [2022-03-20 18:06:59,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:06:59,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1217835578] [2022-03-20 18:06:59,638 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:06:59,638 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:06:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1366479345, now seen corresponding path program 144 times [2022-03-20 18:06:59,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:06:59,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684909271] [2022-03-20 18:06:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:06:59,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:06:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:01,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:07:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:07:01,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:07:01,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684909271] [2022-03-20 18:07:01,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684909271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:07:01,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525355675] [2022-03-20 18:07:01,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:07:01,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:07:01,397 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:07:01,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 18:07:01,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:07:01,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:07:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:07:01,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:07:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-03-20 18:07:02,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:07:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-03-20 18:07:02,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525355675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:07:02,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:07:02,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 7, 7] total 81 [2022-03-20 18:07:02,404 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:07:02,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1217835578] [2022-03-20 18:07:02,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1217835578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:07:02,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:07:02,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 18:07:02,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536035090] [2022-03-20 18:07:02,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:07:02,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 18:07:02,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 18:07:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3009, Invalid=3471, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 18:07:02,406 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 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) [2022-03-20 18:07:13,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:07:13,943 INFO L93 Difference]: Finished difference Result 537 states and 685 transitions. [2022-03-20 18:07:13,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 18:07:13,944 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 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 165 [2022-03-20 18:07:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:07:13,945 INFO L225 Difference]: With dead ends: 537 [2022-03-20 18:07:13,945 INFO L226 Difference]: Without dead ends: 520 [2022-03-20 18:07:13,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8626, Invalid=14630, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 18:07:13,946 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2185 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:07:13,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 22 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:07:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-20 18:07:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 168. [2022-03-20 18:07:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2022-03-20 18:07:14,094 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 165 [2022-03-20 18:07:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:07:14,095 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2022-03-20 18:07:14,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 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) [2022-03-20 18:07:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2022-03-20 18:07:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 18:07:14,096 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:07:14,096 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:07:14,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 18:07:14,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:14,314 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:07:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:07:14,314 INFO L85 PathProgramCache]: Analyzing trace with hash 458390957, now seen corresponding path program 145 times [2022-03-20 18:07:14,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:14,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412671307] [2022-03-20 18:07:14,324 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:07:14,324 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:07:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash 458390957, now seen corresponding path program 146 times [2022-03-20 18:07:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:07:14,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334221744] [2022-03-20 18:07:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:07:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:07:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:16,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:07:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:07:16,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:07:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334221744] [2022-03-20 18:07:16,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334221744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:07:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489692870] [2022-03-20 18:07:16,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:07:16,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:16,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:07:16,061 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:07:16,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 18:07:16,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:07:16,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:07:16,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 18:07:16,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:07:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:07:16,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:07:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:07:20,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489692870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:07:20,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:07:20,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-03-20 18:07:20,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:07:20,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412671307] [2022-03-20 18:07:20,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412671307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:07:20,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:07:20,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 18:07:20,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434783973] [2022-03-20 18:07:20,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:07:20,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 18:07:20,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:20,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 18:07:20,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-03-20 18:07:20,155 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 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) [2022-03-20 18:07:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:07:32,261 INFO L93 Difference]: Finished difference Result 544 states and 694 transitions. [2022-03-20 18:07:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 18:07:32,261 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 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 167 [2022-03-20 18:07:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:07:32,269 INFO L225 Difference]: With dead ends: 544 [2022-03-20 18:07:32,269 INFO L226 Difference]: Without dead ends: 527 [2022-03-20 18:07:32,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 18:07:32,271 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1875 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:07:32,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1875 Valid, 47 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:07:32,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-20 18:07:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 170. [2022-03-20 18:07:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 165 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-03-20 18:07:32,438 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 167 [2022-03-20 18:07:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:07:32,439 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-03-20 18:07:32,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 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) [2022-03-20 18:07:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-03-20 18:07:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 18:07:32,439 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:07:32,439 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:07:32,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 18:07:32,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:32,659 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:07:32,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:07:32,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1812094411, now seen corresponding path program 147 times [2022-03-20 18:07:32,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:32,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945764070] [2022-03-20 18:07:32,660 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:07:32,660 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:07:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1812094411, now seen corresponding path program 148 times [2022-03-20 18:07:32,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:07:32,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472334634] [2022-03-20 18:07:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:07:32,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:07:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:34,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:07:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:07:34,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:07:34,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472334634] [2022-03-20 18:07:34,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472334634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:07:34,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780715513] [2022-03-20 18:07:34,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:07:34,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:34,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:07:34,423 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:07:34,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 18:07:34,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:07:34,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:07:34,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 18:07:34,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:07:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:07:35,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:07:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:07:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780715513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:07:38,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:07:38,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-20 18:07:38,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:07:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945764070] [2022-03-20 18:07:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945764070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:07:38,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:07:38,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 18:07:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400708649] [2022-03-20 18:07:38,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:07:38,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 18:07:38,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 18:07:38,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 18:07:38,915 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 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) [2022-03-20 18:07:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:07:50,469 INFO L93 Difference]: Finished difference Result 551 states and 703 transitions. [2022-03-20 18:07:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 18:07:50,469 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 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 169 [2022-03-20 18:07:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:07:50,472 INFO L225 Difference]: With dead ends: 551 [2022-03-20 18:07:50,472 INFO L226 Difference]: Without dead ends: 534 [2022-03-20 18:07:50,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-03-20 18:07:50,474 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1850 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:07:50,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 42 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:07:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-03-20 18:07:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 172. [2022-03-20 18:07:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.029940119760479) internal successors, (172), 167 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:07:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2022-03-20 18:07:50,642 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 169 [2022-03-20 18:07:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:07:50,642 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2022-03-20 18:07:50,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 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) [2022-03-20 18:07:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2022-03-20 18:07:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 18:07:50,643 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:07:50,643 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:07:50,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-20 18:07:50,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-20 18:07:50,861 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:07:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:07:50,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1346023017, now seen corresponding path program 149 times [2022-03-20 18:07:50,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:50,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1724944940] [2022-03-20 18:07:50,862 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:07:50,863 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:07:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1346023017, now seen corresponding path program 150 times [2022-03-20 18:07:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:07:50,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865075153] [2022-03-20 18:07:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:07:50,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:07:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:52,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:07:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:07:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:07:52,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:07:52,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865075153] [2022-03-20 18:07:52,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865075153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:07:52,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703632763] [2022-03-20 18:07:52,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:07:52,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:07:52,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:07:52,668 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:07:52,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 18:07:53,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:07:53,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:07:53,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:07:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:07:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-03-20 18:07:53,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:07:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-03-20 18:07:53,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703632763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:07:53,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:07:53,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 84 [2022-03-20 18:07:53,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:07:53,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1724944940] [2022-03-20 18:07:53,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1724944940] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:07:53,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:07:53,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 18:07:53,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963626621] [2022-03-20 18:07:53,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:07:53,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 18:07:53,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:07:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 18:07:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3246, Invalid=3726, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:07:53,737 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 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) [2022-03-20 18:08:05,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:08:05,567 INFO L93 Difference]: Finished difference Result 558 states and 712 transitions. [2022-03-20 18:08:05,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 18:08:05,567 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 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 171 [2022-03-20 18:08:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:08:05,568 INFO L225 Difference]: With dead ends: 558 [2022-03-20 18:08:05,568 INFO L226 Difference]: Without dead ends: 541 [2022-03-20 18:08:05,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9322, Invalid=15800, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 18:08:05,569 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2334 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2334 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:08:05,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2334 Valid, 42 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:08:05,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-03-20 18:08:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 174. [2022-03-20 18:08:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:08:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-03-20 18:08:05,754 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 171 [2022-03-20 18:08:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:08:05,755 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-03-20 18:08:05,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 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) [2022-03-20 18:08:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-03-20 18:08:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 18:08:05,755 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:08:05,755 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:08:05,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-20 18:08:05,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-20 18:08:05,974 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:08:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:08:05,974 INFO L85 PathProgramCache]: Analyzing trace with hash 128012167, now seen corresponding path program 151 times [2022-03-20 18:08:05,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:05,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [476138354] [2022-03-20 18:08:05,975 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:08:05,975 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:08:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash 128012167, now seen corresponding path program 152 times [2022-03-20 18:08:05,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:08:05,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104609680] [2022-03-20 18:08:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:08:05,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:08:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:07,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:08:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:08:07,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:08:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104609680] [2022-03-20 18:08:07,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104609680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:08:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118050967] [2022-03-20 18:08:07,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:08:07,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:08:07,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:08:07,812 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:08:07,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 18:08:08,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:08:08,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:08:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 18:08:08,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:08:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:08:08,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:08:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:08:12,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118050967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:08:12,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:08:12,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-03-20 18:08:12,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:08:12,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [476138354] [2022-03-20 18:08:12,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [476138354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:08:12,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:08:12,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 18:08:12,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788734376] [2022-03-20 18:08:12,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:08:12,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 18:08:12,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 18:08:12,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 18:08:12,741 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 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) [2022-03-20 18:08:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:08:25,734 INFO L93 Difference]: Finished difference Result 565 states and 721 transitions. [2022-03-20 18:08:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 18:08:25,734 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 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 173 [2022-03-20 18:08:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:08:25,737 INFO L225 Difference]: With dead ends: 565 [2022-03-20 18:08:25,737 INFO L226 Difference]: Without dead ends: 548 [2022-03-20 18:08:25,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-03-20 18:08:25,739 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2252 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2252 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:08:25,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2252 Valid, 47 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:08:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-03-20 18:08:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 176. [2022-03-20 18:08:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0292397660818713) internal successors, (176), 171 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:08:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2022-03-20 18:08:25,937 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 173 [2022-03-20 18:08:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:08:25,937 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2022-03-20 18:08:25,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 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) [2022-03-20 18:08:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2022-03-20 18:08:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 18:08:25,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:08:25,938 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:08:25,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 18:08:26,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:08:26,152 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:08:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:08:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2145657125, now seen corresponding path program 153 times [2022-03-20 18:08:26,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:26,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [401996624] [2022-03-20 18:08:26,153 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:08:26,153 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:08:26,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2145657125, now seen corresponding path program 154 times [2022-03-20 18:08:26,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:08:26,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323029977] [2022-03-20 18:08:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:08:26,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:08:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:28,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:08:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:08:28,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:08:28,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323029977] [2022-03-20 18:08:28,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323029977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:08:28,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622874459] [2022-03-20 18:08:28,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:08:28,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:08:28,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:08:28,124 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:08:28,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 18:08:28,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:08:28,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:08:28,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-20 18:08:28,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:08:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:08:29,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:08:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:08:34,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622874459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:08:34,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:08:34,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-20 18:08:34,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:08:34,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [401996624] [2022-03-20 18:08:34,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [401996624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:08:34,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:08:34,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 18:08:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245838123] [2022-03-20 18:08:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:08:34,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 18:08:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 18:08:34,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 18:08:34,385 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 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) [2022-03-20 18:08:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:08:49,005 INFO L93 Difference]: Finished difference Result 572 states and 730 transitions. [2022-03-20 18:08:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 18:08:49,010 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 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 175 [2022-03-20 18:08:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:08:49,012 INFO L225 Difference]: With dead ends: 572 [2022-03-20 18:08:49,012 INFO L226 Difference]: Without dead ends: 555 [2022-03-20 18:08:49,014 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-03-20 18:08:49,014 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:08:49,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 32 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:08:49,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-03-20 18:08:49,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 178. [2022-03-20 18:08:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:08:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2022-03-20 18:08:49,208 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 175 [2022-03-20 18:08:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:08:49,208 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2022-03-20 18:08:49,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 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) [2022-03-20 18:08:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2022-03-20 18:08:49,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 18:08:49,209 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:08:49,209 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:08:49,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-20 18:08:49,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:08:49,430 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:08:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:08:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash -222756029, now seen corresponding path program 155 times [2022-03-20 18:08:49,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:49,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1200742230] [2022-03-20 18:08:49,431 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:08:49,431 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:08:49,431 INFO L85 PathProgramCache]: Analyzing trace with hash -222756029, now seen corresponding path program 156 times [2022-03-20 18:08:49,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:08:49,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881494807] [2022-03-20 18:08:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:08:49,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:08:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:51,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:08:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:08:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:08:51,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:08:51,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881494807] [2022-03-20 18:08:51,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881494807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:08:51,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555107878] [2022-03-20 18:08:51,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:08:51,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:08:51,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:08:51,154 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:08:51,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 18:08:51,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:08:51,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:08:51,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:08:51,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:08:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-03-20 18:08:51,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:08:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-03-20 18:08:52,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555107878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:08:52,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:08:52,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 7, 7] total 87 [2022-03-20 18:08:52,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:08:52,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1200742230] [2022-03-20 18:08:52,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1200742230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:08:52,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:08:52,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 18:08:52,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883435475] [2022-03-20 18:08:52,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:08:52,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 18:08:52,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:08:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 18:08:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3492, Invalid=3990, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:08:52,174 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 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) [2022-03-20 18:09:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:09:06,347 INFO L93 Difference]: Finished difference Result 579 states and 739 transitions. [2022-03-20 18:09:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 18:09:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 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 177 [2022-03-20 18:09:06,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:09:06,349 INFO L225 Difference]: With dead ends: 579 [2022-03-20 18:09:06,349 INFO L226 Difference]: Without dead ends: 562 [2022-03-20 18:09:06,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10045, Invalid=17015, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 18:09:06,350 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2201 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2201 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:09:06,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2201 Valid, 42 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:09:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-03-20 18:09:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 180. [2022-03-20 18:09:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 175 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2022-03-20 18:09:06,541 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 177 [2022-03-20 18:09:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:09:06,541 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2022-03-20 18:09:06,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 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) [2022-03-20 18:09:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2022-03-20 18:09:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 18:09:06,542 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:09:06,542 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:09:06,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-20 18:09:06,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:06,762 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:09:06,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:09:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash 64869857, now seen corresponding path program 157 times [2022-03-20 18:09:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:06,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1237982179] [2022-03-20 18:09:06,763 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:09:06,763 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:09:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash 64869857, now seen corresponding path program 158 times [2022-03-20 18:09:06,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:09:06,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663383341] [2022-03-20 18:09:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:09:06,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:09:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:08,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:09:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:09:08,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:09:08,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663383341] [2022-03-20 18:09:08,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663383341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:09:08,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325215685] [2022-03-20 18:09:08,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:09:08,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:08,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:09:08,224 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:09:08,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 18:09:08,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:09:08,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:09:08,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 18:09:08,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:09:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:09:09,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:09:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:09:13,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325215685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:09:13,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:09:13,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-03-20 18:09:13,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:09:13,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1237982179] [2022-03-20 18:09:13,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1237982179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:09:13,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:09:13,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 18:09:13,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098356469] [2022-03-20 18:09:13,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:09:13,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 18:09:13,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 18:09:13,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 18:09:13,699 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 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) [2022-03-20 18:09:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:09:27,867 INFO L93 Difference]: Finished difference Result 586 states and 748 transitions. [2022-03-20 18:09:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 18:09:27,867 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 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 179 [2022-03-20 18:09:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:09:27,869 INFO L225 Difference]: With dead ends: 586 [2022-03-20 18:09:27,869 INFO L226 Difference]: Without dead ends: 569 [2022-03-20 18:09:27,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-03-20 18:09:27,871 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1828 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1828 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:09:27,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1828 Valid, 52 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:09:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-20 18:09:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 182. [2022-03-20 18:09:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2022-03-20 18:09:28,071 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 179 [2022-03-20 18:09:28,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:09:28,071 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2022-03-20 18:09:28,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 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) [2022-03-20 18:09:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2022-03-20 18:09:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 18:09:28,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:09:28,072 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:09:28,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-20 18:09:28,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:28,275 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:09:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:09:28,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1595439359, now seen corresponding path program 159 times [2022-03-20 18:09:28,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:28,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [903802970] [2022-03-20 18:09:28,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:09:28,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:09:28,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1595439359, now seen corresponding path program 160 times [2022-03-20 18:09:28,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:09:28,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613658224] [2022-03-20 18:09:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:09:28,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:09:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:30,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:09:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:09:30,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:09:30,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613658224] [2022-03-20 18:09:30,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613658224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:09:30,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920697741] [2022-03-20 18:09:30,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:09:30,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:09:30,254 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:09:30,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 18:09:30,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:09:30,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:09:30,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 18:09:30,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:09:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:09:31,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:09:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:09:36,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920697741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:09:36,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:09:36,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-20 18:09:36,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:09:36,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [903802970] [2022-03-20 18:09:36,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [903802970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:09:36,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:09:36,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 18:09:36,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817609415] [2022-03-20 18:09:36,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:09:36,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 18:09:36,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 18:09:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 18:09:36,934 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 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) [2022-03-20 18:09:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:09:51,924 INFO L93 Difference]: Finished difference Result 593 states and 757 transitions. [2022-03-20 18:09:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 18:09:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 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 181 [2022-03-20 18:09:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:09:51,926 INFO L225 Difference]: With dead ends: 593 [2022-03-20 18:09:51,926 INFO L226 Difference]: Without dead ends: 576 [2022-03-20 18:09:51,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 18:09:51,928 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2225 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2225 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:09:51,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2225 Valid, 32 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:09:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-03-20 18:09:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 184. [2022-03-20 18:09:52,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:09:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2022-03-20 18:09:52,118 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2022-03-20 18:09:52,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:09:52,119 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2022-03-20 18:09:52,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 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) [2022-03-20 18:09:52,119 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2022-03-20 18:09:52,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 18:09:52,119 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:09:52,119 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:09:52,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-20 18:09:52,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:52,324 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:09:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:09:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -701051747, now seen corresponding path program 161 times [2022-03-20 18:09:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:52,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [73136166] [2022-03-20 18:09:52,335 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:09:52,335 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:09:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash -701051747, now seen corresponding path program 162 times [2022-03-20 18:09:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:09:52,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726988762] [2022-03-20 18:09:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:09:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:09:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:54,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:09:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:09:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:09:54,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:09:54,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726988762] [2022-03-20 18:09:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726988762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:09:54,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304774931] [2022-03-20 18:09:54,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:09:54,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:09:54,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:09:54,422 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:09:54,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 18:09:55,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:09:55,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:09:55,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:09:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:09:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-03-20 18:09:55,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:09:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-03-20 18:09:55,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304774931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:09:55,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:09:55,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 7, 7] total 90 [2022-03-20 18:09:55,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:09:55,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [73136166] [2022-03-20 18:09:55,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [73136166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:09:55,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:09:55,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 18:09:55,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764163549] [2022-03-20 18:09:55,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:09:55,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 18:09:55,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:09:55,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 18:09:55,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=4263, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 18:09:55,617 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 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) [2022-03-20 18:10:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:10:11,381 INFO L93 Difference]: Finished difference Result 600 states and 766 transitions. [2022-03-20 18:10:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 18:10:11,381 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 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 183 [2022-03-20 18:10:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:10:11,383 INFO L225 Difference]: With dead ends: 600 [2022-03-20 18:10:11,383 INFO L226 Difference]: Without dead ends: 583 [2022-03-20 18:10:11,384 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 361 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3809 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10795, Invalid=18275, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 18:10:11,384 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2066 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2066 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:10:11,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2066 Valid, 57 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:10:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-20 18:10:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 186. [2022-03-20 18:10:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 181 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:10:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2022-03-20 18:10:11,593 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2022-03-20 18:10:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:10:11,593 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2022-03-20 18:10:11,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 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) [2022-03-20 18:10:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2022-03-20 18:10:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 18:10:11,594 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:10:11,594 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:10:11,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-20 18:10:11,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-20 18:10:11,796 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:10:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:10:11,796 INFO L85 PathProgramCache]: Analyzing trace with hash -15814469, now seen corresponding path program 163 times [2022-03-20 18:10:11,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:10:11,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818312647] [2022-03-20 18:10:11,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:10:11,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:10:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash -15814469, now seen corresponding path program 164 times [2022-03-20 18:10:11,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:10:11,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898582338] [2022-03-20 18:10:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:10:11,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:10:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:10:13,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:10:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:10:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:10:13,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:10:13,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898582338] [2022-03-20 18:10:13,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898582338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:10:13,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799386519] [2022-03-20 18:10:13,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:10:13,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:10:13,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:10:13,436 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:10:13,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 18:10:14,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:10:14,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:10:14,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 18:10:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:10:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:10:14,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:10:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:10:20,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799386519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:10:20,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:10:20,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-03-20 18:10:20,084 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:10:20,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818312647] [2022-03-20 18:10:20,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818312647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:10:20,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:10:20,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 18:10:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024686531] [2022-03-20 18:10:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:10:20,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 18:10:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:10:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 18:10:20,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-03-20 18:10:20,087 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 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) [2022-03-20 18:10:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:10:36,384 INFO L93 Difference]: Finished difference Result 607 states and 775 transitions. [2022-03-20 18:10:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 18:10:36,384 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 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 185 [2022-03-20 18:10:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:10:36,386 INFO L225 Difference]: With dead ends: 607 [2022-03-20 18:10:36,386 INFO L226 Difference]: Without dead ends: 590 [2022-03-20 18:10:36,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-03-20 18:10:36,388 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1958 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:10:36,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1958 Valid, 42 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:10:36,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-03-20 18:10:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 188. [2022-03-20 18:10:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0273224043715847) internal successors, (188), 183 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:10:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2022-03-20 18:10:36,589 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 185 [2022-03-20 18:10:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:10:36,589 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2022-03-20 18:10:36,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 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) [2022-03-20 18:10:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2022-03-20 18:10:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 18:10:36,594 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:10:36,594 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:10:36,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-20 18:10:36,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:10:36,795 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:10:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:10:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1367213401, now seen corresponding path program 165 times [2022-03-20 18:10:36,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:10:36,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [555280637] [2022-03-20 18:10:36,796 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:10:36,796 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:10:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1367213401, now seen corresponding path program 166 times [2022-03-20 18:10:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:10:36,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642515539] [2022-03-20 18:10:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:10:36,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:10:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:10:38,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:10:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:10:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:10:38,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:10:38,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642515539] [2022-03-20 18:10:38,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642515539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:10:38,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969061371] [2022-03-20 18:10:38,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:10:38,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:10:38,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:10:38,796 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:10:38,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 18:10:39,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:10:39,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:10:39,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 18:10:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:10:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:10:39,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:10:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:10:43,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969061371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:10:43,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:10:43,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-20 18:10:43,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:10:43,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [555280637] [2022-03-20 18:10:43,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [555280637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:10:43,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:10:43,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 18:10:43,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679476683] [2022-03-20 18:10:43,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:10:43,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 18:10:43,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:10:43,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 18:10:43,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 18:10:43,814 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 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) [2022-03-20 18:11:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:11:02,611 INFO L93 Difference]: Finished difference Result 614 states and 784 transitions. [2022-03-20 18:11:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 18:11:02,611 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 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 187 [2022-03-20 18:11:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:11:02,613 INFO L225 Difference]: With dead ends: 614 [2022-03-20 18:11:02,613 INFO L226 Difference]: Without dead ends: 597 [2022-03-20 18:11:02,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-03-20 18:11:02,615 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2192 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2192 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:11:02,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2192 Valid, 42 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:11:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-03-20 18:11:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 190. [2022-03-20 18:11:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.027027027027027) internal successors, (190), 185 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:11:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2022-03-20 18:11:02,849 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 187 [2022-03-20 18:11:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:11:02,849 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2022-03-20 18:11:02,849 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 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) [2022-03-20 18:11:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2022-03-20 18:11:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-20 18:11:02,850 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:11:02,850 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:11:02,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-20 18:11:03,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:11:03,063 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:11:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:11:03,063 INFO L85 PathProgramCache]: Analyzing trace with hash -982865289, now seen corresponding path program 167 times [2022-03-20 18:11:03,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:11:03,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1395153659] [2022-03-20 18:11:03,064 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:11:03,064 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:11:03,064 INFO L85 PathProgramCache]: Analyzing trace with hash -982865289, now seen corresponding path program 168 times [2022-03-20 18:11:03,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:11:03,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671314830] [2022-03-20 18:11:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:11:03,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:11:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:11:05,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:11:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:11:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:11:05,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:11:05,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671314830] [2022-03-20 18:11:05,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671314830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:11:05,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627430448] [2022-03-20 18:11:05,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:11:05,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:11:05,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:11:05,377 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:11:05,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 18:11:06,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:11:06,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:11:06,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:11:06,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:11:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-03-20 18:11:06,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:11:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-03-20 18:11:06,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627430448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:11:06,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:11:06,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 7, 7] total 93 [2022-03-20 18:11:06,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:11:06,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1395153659] [2022-03-20 18:11:06,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1395153659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:11:06,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:11:06,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 18:11:06,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395263935] [2022-03-20 18:11:06,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:11:06,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 18:11:06,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:11:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 18:11:06,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4011, Invalid=4545, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 18:11:06,633 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 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) [2022-03-20 18:11:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:11:27,799 INFO L93 Difference]: Finished difference Result 621 states and 793 transitions. [2022-03-20 18:11:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 18:11:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 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 189 [2022-03-20 18:11:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:11:27,801 INFO L225 Difference]: With dead ends: 621 [2022-03-20 18:11:27,801 INFO L226 Difference]: Without dead ends: 604 [2022-03-20 18:11:27,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=11572, Invalid=19580, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 18:11:27,803 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2163 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2163 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:11:27,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2163 Valid, 42 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 18:11:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-20 18:11:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 192. [2022-03-20 18:11:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0267379679144386) internal successors, (192), 187 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:11:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-03-20 18:11:28,031 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 189 [2022-03-20 18:11:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:11:28,031 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-03-20 18:11:28,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 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) [2022-03-20 18:11:28,032 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-03-20 18:11:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 18:11:28,032 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:11:28,032 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:11:28,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-20 18:11:28,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:11:28,233 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:11:28,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:11:28,234 INFO L85 PathProgramCache]: Analyzing trace with hash -255688683, now seen corresponding path program 169 times [2022-03-20 18:11:28,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:11:28,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2062704311] [2022-03-20 18:11:28,235 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:11:28,235 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:11:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash -255688683, now seen corresponding path program 170 times [2022-03-20 18:11:28,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:11:28,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954956439] [2022-03-20 18:11:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:11:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:11:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:11:30,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:11:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:11:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:11:30,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:11:30,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954956439] [2022-03-20 18:11:30,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954956439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:11:30,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662137542] [2022-03-20 18:11:30,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:11:30,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:11:30,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:11:30,575 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:11:30,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 18:11:31,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:11:31,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:11:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 18:11:31,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:11:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:11:31,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:11:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:11:38,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662137542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:11:38,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:11:38,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-03-20 18:11:38,145 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:11:38,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2062704311] [2022-03-20 18:11:38,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2062704311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:11:38,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:11:38,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 18:11:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107543641] [2022-03-20 18:11:38,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:11:38,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 18:11:38,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:11:38,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 18:11:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-03-20 18:11:38,148 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 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) [2022-03-20 18:11:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:11:57,959 INFO L93 Difference]: Finished difference Result 628 states and 802 transitions. [2022-03-20 18:11:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 18:11:57,959 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 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 191 [2022-03-20 18:11:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:11:57,973 INFO L225 Difference]: With dead ends: 628 [2022-03-20 18:11:57,974 INFO L226 Difference]: Without dead ends: 611 [2022-03-20 18:11:57,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-03-20 18:11:57,976 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1974 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:11:57,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1974 Valid, 57 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:11:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-20 18:11:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 194. [2022-03-20 18:11:58,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0264550264550265) internal successors, (194), 189 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:11:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-03-20 18:11:58,211 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2022-03-20 18:11:58,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:11:58,211 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-03-20 18:11:58,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 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) [2022-03-20 18:11:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-03-20 18:11:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 18:11:58,212 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:11:58,212 INFO L499 BasicCegarLoop]: trace histogram [85, 85, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:11:58,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-20 18:11:58,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:11:58,427 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:11:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:11:58,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1518639565, now seen corresponding path program 171 times [2022-03-20 18:11:58,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:11:58,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294104783] [2022-03-20 18:11:58,429 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:11:58,429 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:11:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1518639565, now seen corresponding path program 172 times [2022-03-20 18:11:58,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:11:58,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466615257] [2022-03-20 18:11:58,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:11:58,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:11:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:00,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:12:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:12:00,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:12:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466615257] [2022-03-20 18:12:00,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466615257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:12:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487803823] [2022-03-20 18:12:00,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:12:00,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:12:00,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:12:00,394 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:12:00,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 18:12:01,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:12:01,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:12:01,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 18:12:01,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:12:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:12:01,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:12:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:12:06,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487803823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:12:06,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:12:06,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-20 18:12:06,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:12:06,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294104783] [2022-03-20 18:12:06,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294104783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:12:06,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:12:06,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 18:12:06,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489352810] [2022-03-20 18:12:06,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:12:06,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 18:12:06,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:12:06,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 18:12:06,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 18:12:06,311 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 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) [2022-03-20 18:12:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:12:26,378 INFO L93 Difference]: Finished difference Result 635 states and 811 transitions. [2022-03-20 18:12:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 18:12:26,378 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 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 193 [2022-03-20 18:12:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:12:26,379 INFO L225 Difference]: With dead ends: 635 [2022-03-20 18:12:26,380 INFO L226 Difference]: Without dead ends: 618 [2022-03-20 18:12:26,382 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-03-20 18:12:26,382 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2127 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:12:26,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2127 Valid, 47 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:12:26,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-20 18:12:26,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 196. [2022-03-20 18:12:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2022-03-20 18:12:26,632 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2022-03-20 18:12:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:12:26,632 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2022-03-20 18:12:26,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 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) [2022-03-20 18:12:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2022-03-20 18:12:26,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 18:12:26,633 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:12:26,633 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:12:26,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-20 18:12:26,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:12:26,847 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:12:26,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:12:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash 261307601, now seen corresponding path program 173 times [2022-03-20 18:12:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:12:26,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [530293520] [2022-03-20 18:12:26,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:12:26,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:12:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash 261307601, now seen corresponding path program 174 times [2022-03-20 18:12:26,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:12:26,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348729102] [2022-03-20 18:12:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:12:26,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:12:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:28,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:12:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:12:28,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:12:28,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348729102] [2022-03-20 18:12:28,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348729102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:12:28,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047790567] [2022-03-20 18:12:28,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:12:28,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:12:28,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:12:28,784 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:12:28,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 18:12:29,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:12:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:12:29,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:12:29,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:12:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-03-20 18:12:29,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:12:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-03-20 18:12:30,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047790567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:12:30,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:12:30,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 7, 7] total 96 [2022-03-20 18:12:30,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:12:30,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [530293520] [2022-03-20 18:12:30,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [530293520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:12:30,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:12:30,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 18:12:30,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673934073] [2022-03-20 18:12:30,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:12:30,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 18:12:30,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:12:30,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 18:12:30,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4284, Invalid=4836, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 18:12:30,143 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 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) [2022-03-20 18:12:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:12:51,511 INFO L93 Difference]: Finished difference Result 642 states and 820 transitions. [2022-03-20 18:12:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 18:12:51,512 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 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 195 [2022-03-20 18:12:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:12:51,513 INFO L225 Difference]: With dead ends: 642 [2022-03-20 18:12:51,513 INFO L226 Difference]: Without dead ends: 625 [2022-03-20 18:12:51,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 385 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12376, Invalid=20930, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 18:12:51,514 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2203 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:12:51,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2203 Valid, 37 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:12:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-03-20 18:12:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 198. [2022-03-20 18:12:51,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:12:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2022-03-20 18:12:51,786 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 195 [2022-03-20 18:12:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:12:51,786 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2022-03-20 18:12:51,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 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) [2022-03-20 18:12:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2022-03-20 18:12:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 18:12:51,787 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:12:51,787 INFO L499 BasicCegarLoop]: trace histogram [87, 87, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:12:51,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-20 18:12:52,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-20 18:12:52,008 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:12:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:12:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550319, now seen corresponding path program 175 times [2022-03-20 18:12:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:12:52,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1793294594] [2022-03-20 18:12:52,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:12:52,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:12:52,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550319, now seen corresponding path program 176 times [2022-03-20 18:12:52,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:12:52,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866193805] [2022-03-20 18:12:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:12:52,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:12:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:54,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:12:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:12:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:12:54,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:12:54,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866193805] [2022-03-20 18:12:54,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866193805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:12:54,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965584497] [2022-03-20 18:12:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:12:54,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:12:54,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:12:54,434 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:12:54,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 18:12:55,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:12:55,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:12:55,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 18:12:55,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:12:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:12:55,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:13:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:13:00,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965584497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:13:00,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:13:00,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-03-20 18:13:00,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:13:00,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1793294594] [2022-03-20 18:13:00,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1793294594] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:13:00,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:13:00,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 18:13:00,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550272] [2022-03-20 18:13:00,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:13:00,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 18:13:00,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:13:00,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 18:13:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 18:13:00,295 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 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) [2022-03-20 18:13:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:13:21,395 INFO L93 Difference]: Finished difference Result 649 states and 829 transitions. [2022-03-20 18:13:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 18:13:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 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 197 [2022-03-20 18:13:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:13:21,397 INFO L225 Difference]: With dead ends: 649 [2022-03-20 18:13:21,397 INFO L226 Difference]: Without dead ends: 632 [2022-03-20 18:13:21,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-03-20 18:13:21,400 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2162 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2162 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:13:21,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2162 Valid, 42 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:13:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-03-20 18:13:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 200. [2022-03-20 18:13:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0256410256410255) internal successors, (200), 195 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:13:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2022-03-20 18:13:21,679 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 197 [2022-03-20 18:13:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:13:21,679 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2022-03-20 18:13:21,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 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) [2022-03-20 18:13:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2022-03-20 18:13:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 18:13:21,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:13:21,680 INFO L499 BasicCegarLoop]: trace histogram [88, 88, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:13:21,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-20 18:13:21,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:13:21,903 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:13:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:13:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1442890867, now seen corresponding path program 177 times [2022-03-20 18:13:21,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:13:21,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [699071320] [2022-03-20 18:13:21,904 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:13:21,905 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:13:21,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1442890867, now seen corresponding path program 178 times [2022-03-20 18:13:21,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:13:21,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186878928] [2022-03-20 18:13:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:13:21,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:13:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:13:24,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:13:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:13:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:13:24,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:13:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186878928] [2022-03-20 18:13:24,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186878928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:13:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497449719] [2022-03-20 18:13:24,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:13:24,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:13:24,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:13:24,557 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:13:24,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 18:13:25,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:13:25,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:13:25,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 18:13:25,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:13:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:13:25,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:13:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:13:32,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497449719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:13:32,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:13:32,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-20 18:13:32,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:13:32,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [699071320] [2022-03-20 18:13:32,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [699071320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:13:32,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:13:32,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 18:13:32,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802564256] [2022-03-20 18:13:32,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:13:32,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 18:13:32,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:13:32,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 18:13:32,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 18:13:32,609 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 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) [2022-03-20 18:13:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:13:57,656 INFO L93 Difference]: Finished difference Result 656 states and 838 transitions. [2022-03-20 18:13:57,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 18:13:57,656 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 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 199 [2022-03-20 18:13:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:13:57,658 INFO L225 Difference]: With dead ends: 656 [2022-03-20 18:13:57,658 INFO L226 Difference]: Without dead ends: 639 [2022-03-20 18:13:57,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-03-20 18:13:57,660 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2391 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2391 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:13:57,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2391 Valid, 27 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:13:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-03-20 18:13:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 202. [2022-03-20 18:13:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0253807106598984) internal successors, (202), 197 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:13:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2022-03-20 18:13:57,929 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 199 [2022-03-20 18:13:57,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:13:57,930 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2022-03-20 18:13:57,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 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) [2022-03-20 18:13:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2022-03-20 18:13:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-20 18:13:57,930 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:13:57,930 INFO L499 BasicCegarLoop]: trace histogram [89, 89, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:13:57,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-20 18:13:58,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:13:58,151 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:13:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:13:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash 41362347, now seen corresponding path program 179 times [2022-03-20 18:13:58,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:13:58,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [593997442] [2022-03-20 18:13:58,153 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:13:58,153 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:13:58,153 INFO L85 PathProgramCache]: Analyzing trace with hash 41362347, now seen corresponding path program 180 times [2022-03-20 18:13:58,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:13:58,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856630726] [2022-03-20 18:13:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:13:58,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:13:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:00,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:14:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7931 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:14:00,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:14:00,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856630726] [2022-03-20 18:14:00,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856630726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:14:00,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278640988] [2022-03-20 18:14:00,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:14:00,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:14:00,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:14:00,722 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:14:00,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 18:14:01,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:14:01,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:14:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:14:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:14:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7931 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-03-20 18:14:01,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:14:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7931 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-03-20 18:14:02,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278640988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:14:02,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:14:02,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 7, 7] total 99 [2022-03-20 18:14:02,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:14:02,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [593997442] [2022-03-20 18:14:02,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [593997442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:02,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:02,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 18:14:02,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056110499] [2022-03-20 18:14:02,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:14:02,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 18:14:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:02,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 18:14:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4566, Invalid=5136, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 18:14:02,068 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 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) [2022-03-20 18:14:25,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:14:25,773 INFO L93 Difference]: Finished difference Result 663 states and 847 transitions. [2022-03-20 18:14:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 18:14:25,773 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 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 201 [2022-03-20 18:14:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:14:25,774 INFO L225 Difference]: With dead ends: 663 [2022-03-20 18:14:25,774 INFO L226 Difference]: Without dead ends: 646 [2022-03-20 18:14:25,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4637 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13207, Invalid=22325, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 18:14:25,775 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2683 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2683 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:14:25,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2683 Valid, 32 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:14:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-03-20 18:14:26,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 204. [2022-03-20 18:14:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:14:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2022-03-20 18:14:26,047 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 201 [2022-03-20 18:14:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:14:26,047 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2022-03-20 18:14:26,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 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) [2022-03-20 18:14:26,047 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2022-03-20 18:14:26,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 18:14:26,048 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:14:26,048 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:14:26,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-20 18:14:26,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:14:26,250 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:14:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:14:26,251 INFO L85 PathProgramCache]: Analyzing trace with hash 479558729, now seen corresponding path program 181 times [2022-03-20 18:14:26,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:26,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [361435616] [2022-03-20 18:14:26,252 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:14:26,252 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:14:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash 479558729, now seen corresponding path program 182 times [2022-03-20 18:14:26,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:14:26,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585030841] [2022-03-20 18:14:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:14:26,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:14:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:28,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:14:28,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:14:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8110 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:14:28,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:14:28,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585030841] [2022-03-20 18:14:28,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585030841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:14:28,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908901299] [2022-03-20 18:14:28,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:14:28,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:14:28,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:14:28,939 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:14:28,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 18:14:29,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:14:29,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:14:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 18:14:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:14:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8110 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:14:30,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:14:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8110 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:14:36,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908901299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:14:36,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:14:36,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-03-20 18:14:36,760 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:14:36,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [361435616] [2022-03-20 18:14:36,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [361435616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:14:36,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:14:36,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 18:14:36,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792496947] [2022-03-20 18:14:36,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:14:36,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 18:14:36,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:14:36,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 18:14:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17022, Invalid=17388, Unknown=0, NotChecked=0, Total=34410 [2022-03-20 18:14:36,765 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 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) [2022-03-20 18:15:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:15:01,214 INFO L93 Difference]: Finished difference Result 670 states and 856 transitions. [2022-03-20 18:15:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 18:15:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 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 203 [2022-03-20 18:15:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:15:01,216 INFO L225 Difference]: With dead ends: 670 [2022-03-20 18:15:01,216 INFO L226 Difference]: Without dead ends: 653 [2022-03-20 18:15:01,218 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4634 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=33858, Invalid=42594, Unknown=0, NotChecked=0, Total=76452 [2022-03-20 18:15:01,218 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2207 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2207 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:15:01,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2207 Valid, 52 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:15:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-20 18:15:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 206. [2022-03-20 18:15:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0248756218905473) internal successors, (206), 201 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:15:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2022-03-20 18:15:01,493 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 203 [2022-03-20 18:15:01,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:15:01,493 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2022-03-20 18:15:01,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 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) [2022-03-20 18:15:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2022-03-20 18:15:01,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 18:15:01,494 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:15:01,494 INFO L499 BasicCegarLoop]: trace histogram [91, 91, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:15:01,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-20 18:15:01,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:15:01,703 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:15:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:15:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash 679486823, now seen corresponding path program 183 times [2022-03-20 18:15:01,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:01,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [509847159] [2022-03-20 18:15:01,704 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-20 18:15:01,704 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:15:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash 679486823, now seen corresponding path program 184 times [2022-03-20 18:15:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:15:01,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822697214] [2022-03-20 18:15:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:15:01,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:15:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:03,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:15:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:15:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8291 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:15:03,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:15:03,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822697214] [2022-03-20 18:15:03,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822697214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:15:03,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558250002] [2022-03-20 18:15:03,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:15:03,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:15:03,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:15:03,652 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:15:03,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-20 18:15:04,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:15:04,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:15:04,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 18:15:04,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:15:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8291 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:15:04,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:15:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8291 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 18:15:11,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558250002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:15:11,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:15:11,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-03-20 18:15:11,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:15:11,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [509847159] [2022-03-20 18:15:11,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [509847159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:15:11,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:15:11,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 18:15:11,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211806441] [2022-03-20 18:15:11,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:15:11,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 18:15:11,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:15:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 18:15:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17393, Invalid=17763, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 18:15:11,005 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 95 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 94 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)