/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:38:14,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:38:14,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:38:14,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:38:14,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:38:14,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:38:14,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:38:14,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:38:14,968 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:38:14,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:38:14,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:38:14,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:38:14,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:38:14,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:38:14,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:38:14,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:38:14,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:38:14,972 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:38:14,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:38:14,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:38:14,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:38:14,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:38:14,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:38:14,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:38:14,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:38:14,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:38:14,973 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:38:14,973 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:38:14,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:38:14,973 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:38:14,973 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:38:15,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:38:15,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:38:15,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:38:15,212 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:38:15,212 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:38:15,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de62.c [2022-04-06 20:38:15,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7a34e33/eb0c54388ab44c80b050cd20f0dad836/FLAG273af4a0a [2022-04-06 20:38:15,625 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:38:15,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c [2022-04-06 20:38:15,630 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7a34e33/eb0c54388ab44c80b050cd20f0dad836/FLAG273af4a0a [2022-04-06 20:38:15,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea7a34e33/eb0c54388ab44c80b050cd20f0dad836 [2022-04-06 20:38:15,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:38:15,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:38:15,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:38:15,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:38:15,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:38:15,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:38:15" (1/1) ... [2022-04-06 20:38:15,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2de0ccfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15, skipping insertion in model container [2022-04-06 20:38:15,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:38:15" (1/1) ... [2022-04-06 20:38:15,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:38:15,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:38:15,796 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c[368,381] [2022-04-06 20:38:15,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:38:15,816 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:38:15,825 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de62.c[368,381] [2022-04-06 20:38:15,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:38:15,839 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:38:15,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15 WrapperNode [2022-04-06 20:38:15,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:38:15,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:38:15,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:38:15,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:38:15,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15" (1/1) ... [2022-04-06 20:38:15,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15" (1/1) ... [2022-04-06 20:38:15,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15" (1/1) ... [2022-04-06 20:38:15,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15" (1/1) ... [2022-04-06 20:38:15,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15" (1/1) ... [2022-04-06 20:38:15,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15" (1/1) ... [2022-04-06 20:38:15,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15" (1/1) ... [2022-04-06 20:38:15,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:38:15,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:38:15,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:38:15,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:38:15,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15" (1/1) ... [2022-04-06 20:38:15,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:38:15,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:15,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 20:38:15,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 20:38:15,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:38:15,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:38:15,935 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:38:15,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:38:15,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:38:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:38:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:38:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:38:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:38:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 20:38:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:38:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:38:15,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:38:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:38:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:38:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:38:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:38:15,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:38:15,986 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:38:15,988 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:38:16,104 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:38:16,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:38:16,108 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-06 20:38:16,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:38:16 BoogieIcfgContainer [2022-04-06 20:38:16,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:38:16,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:38:16,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:38:16,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:38:16,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:38:15" (1/3) ... [2022-04-06 20:38:16,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5526a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:38:16, skipping insertion in model container [2022-04-06 20:38:16,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:38:15" (2/3) ... [2022-04-06 20:38:16,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5526a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:38:16, skipping insertion in model container [2022-04-06 20:38:16,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:38:16" (3/3) ... [2022-04-06 20:38:16,124 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de62.c [2022-04-06 20:38:16,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:38:16,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:38:16,162 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:38:16,168 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 20:38:16,168 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:38:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:38:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:38:16,195 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:16,196 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:16,197 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:16,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1370249117, now seen corresponding path program 1 times [2022-04-06 20:38:16,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:16,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465935648] [2022-04-06 20:38:16,223 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:38:16,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1370249117, now seen corresponding path program 2 times [2022-04-06 20:38:16,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:16,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722901099] [2022-04-06 20:38:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:16,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:16,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:16,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:16,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722901099] [2022-04-06 20:38:16,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722901099] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:16,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:16,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:38:16,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465935648] [2022-04-06 20:38:16,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465935648] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:16,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:16,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:38:16,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278134440] [2022-04-06 20:38:16,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:16,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:38:16,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:38:16,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:38:16,488 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:16,530 INFO L93 Difference]: Finished difference Result 43 states and 66 transitions. [2022-04-06 20:38:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:38:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:38:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:16,539 INFO L225 Difference]: With dead ends: 43 [2022-04-06 20:38:16,539 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 20:38:16,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:38:16,544 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:16,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:38:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 20:38:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 20:38:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2022-04-06 20:38:16,571 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 17 [2022-04-06 20:38:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:16,571 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2022-04-06 20:38:16,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2022-04-06 20:38:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:38:16,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:16,572 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:16,572 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:38:16,572 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:16,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2115201689, now seen corresponding path program 1 times [2022-04-06 20:38:16,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:16,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [860576362] [2022-04-06 20:38:16,574 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:38:16,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2115201689, now seen corresponding path program 2 times [2022-04-06 20:38:16,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:16,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605401446] [2022-04-06 20:38:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:16,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:16,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:16,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605401446] [2022-04-06 20:38:16,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605401446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:16,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:16,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:38:16,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:16,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [860576362] [2022-04-06 20:38:16,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [860576362] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:16,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:16,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:38:16,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003946884] [2022-04-06 20:38:16,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:16,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:38:16,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:16,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:38:16,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:38:16,685 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:16,786 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-04-06 20:38:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:38:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:38:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:16,789 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:38:16,789 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:38:16,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:38:16,793 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:16,795 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:38:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 20:38:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-04-06 20:38:16,804 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 17 [2022-04-06 20:38:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:16,804 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-04-06 20:38:16,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-04-06 20:38:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:38:16,805 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:16,806 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:16,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:38:16,806 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:16,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:16,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1181238037, now seen corresponding path program 1 times [2022-04-06 20:38:16,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:16,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [910538747] [2022-04-06 20:38:16,808 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:16,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1181238037, now seen corresponding path program 2 times [2022-04-06 20:38:16,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:16,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058476007] [2022-04-06 20:38:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:16,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:16,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:16,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:16,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058476007] [2022-04-06 20:38:16,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058476007] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:16,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:16,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:38:16,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:16,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [910538747] [2022-04-06 20:38:16,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [910538747] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:16,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:16,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:38:16,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000348677] [2022-04-06 20:38:16,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:16,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:38:16,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:16,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:38:16,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:38:16,896 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:16,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:16,974 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2022-04-06 20:38:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:38:16,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 20:38:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:16,975 INFO L225 Difference]: With dead ends: 47 [2022-04-06 20:38:16,975 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 20:38:16,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:38:16,977 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:16,977 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 25 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 20:38:16,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 20:38:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2022-04-06 20:38:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2022-04-06 20:38:16,991 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 18 [2022-04-06 20:38:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:16,992 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2022-04-06 20:38:16,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2022-04-06 20:38:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:38:16,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:16,993 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:16,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:38:16,998 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1710900860, now seen corresponding path program 1 times [2022-04-06 20:38:16,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:17,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1347974248] [2022-04-06 20:38:17,002 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:17,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1710900860, now seen corresponding path program 2 times [2022-04-06 20:38:17,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:17,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499938055] [2022-04-06 20:38:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:17,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:17,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:17,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:17,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499938055] [2022-04-06 20:38:17,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499938055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:17,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:17,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:38:17,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:17,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1347974248] [2022-04-06 20:38:17,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1347974248] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:17,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:17,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:38:17,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113870597] [2022-04-06 20:38:17,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:17,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:38:17,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:17,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:38:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:38:17,056 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:17,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:17,116 INFO L93 Difference]: Finished difference Result 49 states and 69 transitions. [2022-04-06 20:38:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:38:17,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 20:38:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:17,118 INFO L225 Difference]: With dead ends: 49 [2022-04-06 20:38:17,118 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 20:38:17,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:38:17,119 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:17,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:38:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 20:38:17,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 20:38:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2022-04-06 20:38:17,131 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 18 [2022-04-06 20:38:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:17,131 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2022-04-06 20:38:17,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2022-04-06 20:38:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:38:17,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:17,132 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:17,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:38:17,132 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash 375506293, now seen corresponding path program 1 times [2022-04-06 20:38:17,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:17,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1469195961] [2022-04-06 20:38:17,153 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:17,156 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:17,157 INFO L85 PathProgramCache]: Analyzing trace with hash 375506293, now seen corresponding path program 2 times [2022-04-06 20:38:17,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:17,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024964540] [2022-04-06 20:38:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:17,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:17,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:17,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:17,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024964540] [2022-04-06 20:38:17,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024964540] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:17,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:17,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:38:17,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:17,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1469195961] [2022-04-06 20:38:17,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1469195961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:17,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:17,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:38:17,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811281640] [2022-04-06 20:38:17,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:17,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:38:17,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:17,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:38:17,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:38:17,252 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:17,316 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-06 20:38:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:38:17,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:38:17,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:17,320 INFO L225 Difference]: With dead ends: 47 [2022-04-06 20:38:17,320 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 20:38:17,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:38:17,327 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:17,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:38:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 20:38:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 20:38:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2022-04-06 20:38:17,341 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 20 [2022-04-06 20:38:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:17,341 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2022-04-06 20:38:17,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2022-04-06 20:38:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:38:17,342 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:17,342 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:17,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 20:38:17,342 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:17,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:17,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1300031754, now seen corresponding path program 1 times [2022-04-06 20:38:17,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:17,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995218651] [2022-04-06 20:38:17,346 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:17,346 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1300031754, now seen corresponding path program 2 times [2022-04-06 20:38:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:17,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987101708] [2022-04-06 20:38:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:17,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:17,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:17,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:17,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987101708] [2022-04-06 20:38:17,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987101708] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:17,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682780942] [2022-04-06 20:38:17,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:17,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:17,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:17,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:17,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:38:17,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:17,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:17,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:38:17,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:17,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:38:17,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682780942] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:17,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:17,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2022-04-06 20:38:17,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:17,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995218651] [2022-04-06 20:38:17,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995218651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:17,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:17,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:38:17,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007977585] [2022-04-06 20:38:17,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:17,833 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:38:17,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:17,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:38:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:38:17,834 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:17,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:17,949 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2022-04-06 20:38:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:38:17,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:38:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:17,952 INFO L225 Difference]: With dead ends: 71 [2022-04-06 20:38:17,953 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:38:17,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:38:17,956 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:17,956 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 35 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:38:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-04-06 20:38:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 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) [2022-04-06 20:38:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2022-04-06 20:38:17,971 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 20 [2022-04-06 20:38:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:17,972 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2022-04-06 20:38:17,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2022-04-06 20:38:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:38:17,973 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:17,973 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:18,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:18,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 20:38:18,187 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1232820840, now seen corresponding path program 1 times [2022-04-06 20:38:18,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:18,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1443999418] [2022-04-06 20:38:18,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:18,189 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:18,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1232820840, now seen corresponding path program 2 times [2022-04-06 20:38:18,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:18,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217774457] [2022-04-06 20:38:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:18,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:18,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:18,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:18,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217774457] [2022-04-06 20:38:18,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217774457] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:18,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573553824] [2022-04-06 20:38:18,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:18,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:18,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:18,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:18,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:38:18,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:18,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:38:18,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:18,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:18,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573553824] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:18,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:18,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-04-06 20:38:18,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:18,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1443999418] [2022-04-06 20:38:18,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1443999418] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:18,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:18,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:38:18,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008838089] [2022-04-06 20:38:18,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:18,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:38:18,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:38:18,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:38:18,457 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:18,541 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2022-04-06 20:38:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:38:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 20:38:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:18,545 INFO L225 Difference]: With dead ends: 72 [2022-04-06 20:38:18,545 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 20:38:18,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:38:18,546 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:18,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 35 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 20:38:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2022-04-06 20:38:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 46 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) [2022-04-06 20:38:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 72 transitions. [2022-04-06 20:38:18,576 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 72 transitions. Word has length 21 [2022-04-06 20:38:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:18,576 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 72 transitions. [2022-04-06 20:38:18,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2022-04-06 20:38:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 20:38:18,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:18,578 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:18,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:18,794 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,SelfDestructingSolverStorable6 [2022-04-06 20:38:18,794 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1645264519, now seen corresponding path program 3 times [2022-04-06 20:38:18,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:18,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1316608904] [2022-04-06 20:38:18,796 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:18,796 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1645264519, now seen corresponding path program 4 times [2022-04-06 20:38:18,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:18,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683482549] [2022-04-06 20:38:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:18,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:18,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:18,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683482549] [2022-04-06 20:38:18,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683482549] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:18,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418673753] [2022-04-06 20:38:18,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:18,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:18,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:18,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:18,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:38:18,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:18,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:18,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:38:18,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:19,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:38:19,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418673753] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:19,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:38:19,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 10 [2022-04-06 20:38:19,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:19,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1316608904] [2022-04-06 20:38:19,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1316608904] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:19,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:19,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:38:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838469594] [2022-04-06 20:38:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:19,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:38:19,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:38:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:38:19,067 INFO L87 Difference]: Start difference. First operand 51 states and 72 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:19,101 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2022-04-06 20:38:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:38:19,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 20:38:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:19,102 INFO L225 Difference]: With dead ends: 60 [2022-04-06 20:38:19,102 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:38:19,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:38:19,103 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:19,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 48 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:38:19,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:38:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-04-06 20:38:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2022-04-06 20:38:19,124 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 21 [2022-04-06 20:38:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:19,125 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2022-04-06 20:38:19,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:19,125 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2022-04-06 20:38:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:38:19,126 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:19,126 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:19,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 20:38:19,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:19,340 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:19,340 INFO L85 PathProgramCache]: Analyzing trace with hash -29884763, now seen corresponding path program 1 times [2022-04-06 20:38:19,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:19,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412131069] [2022-04-06 20:38:19,342 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:19,342 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:19,342 INFO L85 PathProgramCache]: Analyzing trace with hash -29884763, now seen corresponding path program 2 times [2022-04-06 20:38:19,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:19,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995871280] [2022-04-06 20:38:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:19,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:19,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:19,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995871280] [2022-04-06 20:38:19,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995871280] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042672932] [2022-04-06 20:38:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:19,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:19,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:19,429 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:19,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:38:19,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:19,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:19,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:38:19,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:19,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:19,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042672932] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:19,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:19,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 13 [2022-04-06 20:38:19,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:19,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412131069] [2022-04-06 20:38:19,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412131069] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:19,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:19,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:38:19,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079182226] [2022-04-06 20:38:19,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:19,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:38:19,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:19,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:38:19,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:38:19,685 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:19,860 INFO L93 Difference]: Finished difference Result 72 states and 102 transitions. [2022-04-06 20:38:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:38:19,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 20:38:19,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:19,861 INFO L225 Difference]: With dead ends: 72 [2022-04-06 20:38:19,861 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:38:19,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:38:19,862 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:19,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:38:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-04-06 20:38:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 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) [2022-04-06 20:38:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-04-06 20:38:19,873 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 22 [2022-04-06 20:38:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:19,873 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-04-06 20:38:19,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-04-06 20:38:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:38:19,874 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:19,874 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:19,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:20,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:20,075 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:20,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:20,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2082007595, now seen corresponding path program 1 times [2022-04-06 20:38:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:20,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1076812944] [2022-04-06 20:38:20,077 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:20,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:20,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2082007595, now seen corresponding path program 2 times [2022-04-06 20:38:20,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:20,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310930988] [2022-04-06 20:38:20,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:20,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:20,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:20,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:20,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310930988] [2022-04-06 20:38:20,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310930988] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:20,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467365991] [2022-04-06 20:38:20,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:20,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:20,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:20,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:20,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:38:20,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:20,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:38:20,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:20,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467365991] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:20,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:20,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 13 [2022-04-06 20:38:20,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:20,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1076812944] [2022-04-06 20:38:20,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1076812944] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:20,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:20,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:38:20,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965380692] [2022-04-06 20:38:20,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:20,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:38:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:38:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:38:20,380 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:20,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:20,563 INFO L93 Difference]: Finished difference Result 96 states and 139 transitions. [2022-04-06 20:38:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:38:20,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 20:38:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:20,564 INFO L225 Difference]: With dead ends: 96 [2022-04-06 20:38:20,564 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 20:38:20,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:38:20,565 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:20,566 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 20:38:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2022-04-06 20:38:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 60 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2022-04-06 20:38:20,585 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 22 [2022-04-06 20:38:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:20,585 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2022-04-06 20:38:20,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:20,586 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2022-04-06 20:38:20,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:38:20,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:20,589 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:20,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:20,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 20:38:20,807 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:20,808 INFO L85 PathProgramCache]: Analyzing trace with hash -353925126, now seen corresponding path program 1 times [2022-04-06 20:38:20,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:20,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [361498877] [2022-04-06 20:38:20,809 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:20,810 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash -353925126, now seen corresponding path program 2 times [2022-04-06 20:38:20,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:20,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645774555] [2022-04-06 20:38:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:20,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:20,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:20,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645774555] [2022-04-06 20:38:20,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645774555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:20,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679838447] [2022-04-06 20:38:20,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:20,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:20,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:20,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:20,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:38:20,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:20,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:38:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:21,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:21,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679838447] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:21,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:21,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2022-04-06 20:38:21,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:21,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [361498877] [2022-04-06 20:38:21,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [361498877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:21,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:21,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:38:21,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135440960] [2022-04-06 20:38:21,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:21,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:38:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:21,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:38:21,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:38:21,163 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:21,318 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2022-04-06 20:38:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:38:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:38:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:21,319 INFO L225 Difference]: With dead ends: 101 [2022-04-06 20:38:21,319 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 20:38:21,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:38:21,320 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:21,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 42 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 20:38:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-04-06 20:38:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 52 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) [2022-04-06 20:38:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2022-04-06 20:38:21,334 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 23 [2022-04-06 20:38:21,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:21,334 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2022-04-06 20:38:21,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:21,335 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2022-04-06 20:38:21,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:38:21,335 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:21,335 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:21,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:21,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:21,558 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:21,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1156754328, now seen corresponding path program 3 times [2022-04-06 20:38:21,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:21,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [208029295] [2022-04-06 20:38:21,560 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:21,560 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1156754328, now seen corresponding path program 4 times [2022-04-06 20:38:21,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:21,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623049192] [2022-04-06 20:38:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:21,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:21,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:21,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:21,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623049192] [2022-04-06 20:38:21,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623049192] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:21,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573681717] [2022-04-06 20:38:21,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:21,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:21,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:21,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:21,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:38:21,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:21,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:21,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:38:21,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:21,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:38:21,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573681717] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:21,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:38:21,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 7] total 12 [2022-04-06 20:38:21,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:21,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [208029295] [2022-04-06 20:38:21,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [208029295] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:21,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:21,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:38:21,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041469349] [2022-04-06 20:38:21,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:21,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:38:21,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:21,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:38:21,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:38:21,855 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:21,887 INFO L93 Difference]: Finished difference Result 69 states and 93 transitions. [2022-04-06 20:38:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:38:21,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:38:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:21,888 INFO L225 Difference]: With dead ends: 69 [2022-04-06 20:38:21,888 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 20:38:21,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:38:21,889 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:21,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 44 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:38:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 20:38:21,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-04-06 20:38:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.446808510638298) internal successors, (68), 47 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) [2022-04-06 20:38:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2022-04-06 20:38:21,901 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 23 [2022-04-06 20:38:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:21,901 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2022-04-06 20:38:21,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2022-04-06 20:38:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:38:21,901 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:21,902 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:21,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:22,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:22,124 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:22,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash 489571588, now seen corresponding path program 3 times [2022-04-06 20:38:22,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:22,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [451613302] [2022-04-06 20:38:22,126 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:22,127 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash 489571588, now seen corresponding path program 4 times [2022-04-06 20:38:22,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:22,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844718478] [2022-04-06 20:38:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:22,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:22,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:22,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:22,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844718478] [2022-04-06 20:38:22,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844718478] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:22,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276774944] [2022-04-06 20:38:22,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:22,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:22,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:22,250 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:22,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:38:22,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:22,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:22,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:38:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:38:22,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:38:22,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276774944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:22,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:22,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-04-06 20:38:22,396 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:22,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [451613302] [2022-04-06 20:38:22,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [451613302] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:22,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:22,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:38:22,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747878790] [2022-04-06 20:38:22,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:22,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:38:22,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:22,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:38:22,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:38:22,399 INFO L87 Difference]: Start difference. First operand 52 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:22,730 INFO L93 Difference]: Finished difference Result 93 states and 135 transitions. [2022-04-06 20:38:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:38:22,730 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:38:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:22,731 INFO L225 Difference]: With dead ends: 93 [2022-04-06 20:38:22,731 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:38:22,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:38:22,732 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:22,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 47 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:38:22,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-04-06 20:38:22,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 56 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) [2022-04-06 20:38:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2022-04-06 20:38:22,746 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 24 [2022-04-06 20:38:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:22,746 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2022-04-06 20:38:22,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2022-04-06 20:38:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:38:22,747 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:22,747 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:22,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:22,963 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,SelfDestructingSolverStorable12 [2022-04-06 20:38:22,964 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:22,964 INFO L85 PathProgramCache]: Analyzing trace with hash 531281669, now seen corresponding path program 3 times [2022-04-06 20:38:22,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:22,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1838879639] [2022-04-06 20:38:22,965 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:22,965 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash 531281669, now seen corresponding path program 4 times [2022-04-06 20:38:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:22,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249379307] [2022-04-06 20:38:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:22,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:23,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:23,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249379307] [2022-04-06 20:38:23,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249379307] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516754320] [2022-04-06 20:38:23,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:23,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:23,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:23,054 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:23,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:38:23,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:23,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:23,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:38:23,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:23,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 20:38:23,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516754320] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:23,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:23,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 5] total 14 [2022-04-06 20:38:23,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:23,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1838879639] [2022-04-06 20:38:23,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1838879639] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:23,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:23,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:38:23,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649907881] [2022-04-06 20:38:23,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:23,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:38:23,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:23,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:38:23,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:38:23,287 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:23,532 INFO L93 Difference]: Finished difference Result 123 states and 177 transitions. [2022-04-06 20:38:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:38:23,533 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 20:38:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:23,534 INFO L225 Difference]: With dead ends: 123 [2022-04-06 20:38:23,534 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:38:23,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:38:23,535 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:23,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:23,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:38:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2022-04-06 20:38:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.3670886075949367) internal successors, (108), 79 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) [2022-04-06 20:38:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2022-04-06 20:38:23,552 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 24 [2022-04-06 20:38:23,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:23,554 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2022-04-06 20:38:23,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2022-04-06 20:38:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:38:23,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:23,555 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:23,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:23,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:38:23,763 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash -565826439, now seen corresponding path program 5 times [2022-04-06 20:38:23,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:23,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [946273545] [2022-04-06 20:38:23,765 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:23,765 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:23,765 INFO L85 PathProgramCache]: Analyzing trace with hash -565826439, now seen corresponding path program 6 times [2022-04-06 20:38:23,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:23,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71637246] [2022-04-06 20:38:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:23,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:23,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:38:23,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:23,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71637246] [2022-04-06 20:38:23,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71637246] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:23,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462804236] [2022-04-06 20:38:23,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:23,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:23,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:23,836 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:23,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:38:23,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 20:38:23,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:23,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:38:23,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:38:23,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:38:24,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462804236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:24,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:24,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 9 [2022-04-06 20:38:24,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:24,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [946273545] [2022-04-06 20:38:24,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [946273545] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:24,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:24,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:38:24,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491449331] [2022-04-06 20:38:24,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:24,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:38:24,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:24,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:38:24,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:38:24,039 INFO L87 Difference]: Start difference. First operand 84 states and 112 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) [2022-04-06 20:38:24,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:24,237 INFO L93 Difference]: Finished difference Result 143 states and 199 transitions. [2022-04-06 20:38:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:38:24,237 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 25 [2022-04-06 20:38:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:24,238 INFO L225 Difference]: With dead ends: 143 [2022-04-06 20:38:24,238 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 20:38:24,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:38:24,239 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:24,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 40 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 20:38:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2022-04-06 20:38:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.3529411764705883) internal successors, (115), 85 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2022-04-06 20:38:24,261 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 25 [2022-04-06 20:38:24,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:24,261 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2022-04-06 20:38:24,261 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) [2022-04-06 20:38:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2022-04-06 20:38:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:38:24,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:24,262 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:24,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:24,475 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,SelfDestructingSolverStorable14 [2022-04-06 20:38:24,475 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -869799928, now seen corresponding path program 5 times [2022-04-06 20:38:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:24,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [949238025] [2022-04-06 20:38:24,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:24,477 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash -869799928, now seen corresponding path program 6 times [2022-04-06 20:38:24,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:24,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110322672] [2022-04-06 20:38:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:24,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:24,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:24,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:24,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110322672] [2022-04-06 20:38:24,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110322672] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:24,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172324305] [2022-04-06 20:38:24,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:24,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:24,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:24,573 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:24,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:38:24,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:24,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:24,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:38:24,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:24,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172324305] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:24,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:24,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:38:24,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:24,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [949238025] [2022-04-06 20:38:24,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [949238025] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:24,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:24,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:38:24,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013069155] [2022-04-06 20:38:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:24,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:38:24,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:38:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:38:24,827 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:25,152 INFO L93 Difference]: Finished difference Result 171 states and 250 transitions. [2022-04-06 20:38:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:38:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:38:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:25,153 INFO L225 Difference]: With dead ends: 171 [2022-04-06 20:38:25,153 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 20:38:25,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:38:25,154 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 59 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:25,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 73 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:38:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 20:38:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2022-04-06 20:38:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.36) internal successors, (136), 100 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) [2022-04-06 20:38:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 140 transitions. [2022-04-06 20:38:25,178 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 140 transitions. Word has length 25 [2022-04-06 20:38:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:25,178 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 140 transitions. [2022-04-06 20:38:25,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 140 transitions. [2022-04-06 20:38:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:38:25,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:25,179 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:25,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:25,402 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,SelfDestructingSolverStorable15 [2022-04-06 20:38:25,402 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:25,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1353656475, now seen corresponding path program 7 times [2022-04-06 20:38:25,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:25,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1979329558] [2022-04-06 20:38:25,403 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:25,404 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:25,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1353656475, now seen corresponding path program 8 times [2022-04-06 20:38:25,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:25,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132516694] [2022-04-06 20:38:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:25,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:25,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:25,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:25,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132516694] [2022-04-06 20:38:25,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132516694] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:25,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007054103] [2022-04-06 20:38:25,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:25,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:25,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:25,523 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:25,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:38:25,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:25,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:25,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:38:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:25,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:25,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007054103] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:25,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:25,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 20:38:25,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:25,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1979329558] [2022-04-06 20:38:25,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1979329558] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:25,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:25,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:38:25,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233416390] [2022-04-06 20:38:25,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:25,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:38:25,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:25,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:38:25,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:38:25,809 INFO L87 Difference]: Start difference. First operand 105 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:26,201 INFO L93 Difference]: Finished difference Result 195 states and 288 transitions. [2022-04-06 20:38:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:38:26,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 20:38:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:26,203 INFO L225 Difference]: With dead ends: 195 [2022-04-06 20:38:26,203 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 20:38:26,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:38:26,204 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 75 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:26,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 82 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:38:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 20:38:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 120. [2022-04-06 20:38:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.3652173913043477) internal successors, (157), 115 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 161 transitions. [2022-04-06 20:38:26,228 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 161 transitions. Word has length 26 [2022-04-06 20:38:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:26,229 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 161 transitions. [2022-04-06 20:38:26,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 161 transitions. [2022-04-06 20:38:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:38:26,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:26,229 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:26,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:26,447 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,SelfDestructingSolverStorable16 [2022-04-06 20:38:26,447 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -812701032, now seen corresponding path program 7 times [2022-04-06 20:38:26,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1501693172] [2022-04-06 20:38:26,449 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:26,449 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:26,449 INFO L85 PathProgramCache]: Analyzing trace with hash -812701032, now seen corresponding path program 8 times [2022-04-06 20:38:26,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:26,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895585303] [2022-04-06 20:38:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:26,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:26,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:26,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895585303] [2022-04-06 20:38:26,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895585303] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:26,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571295968] [2022-04-06 20:38:26,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:26,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:26,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:26,566 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:26,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:38:26,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:26,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:26,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:38:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:38:26,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:38:26,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571295968] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:26,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:26,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-04-06 20:38:26,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:26,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1501693172] [2022-04-06 20:38:26,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1501693172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:26,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:26,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:38:26,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179380180] [2022-04-06 20:38:26,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:26,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:38:26,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:38:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:38:26,768 INFO L87 Difference]: Start difference. First operand 120 states and 161 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:27,424 INFO L93 Difference]: Finished difference Result 216 states and 310 transitions. [2022-04-06 20:38:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:38:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:38:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:27,425 INFO L225 Difference]: With dead ends: 216 [2022-04-06 20:38:27,425 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 20:38:27,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:38:27,426 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:27,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 59 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:38:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 20:38:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 144. [2022-04-06 20:38:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.3381294964028776) internal successors, (186), 139 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 190 transitions. [2022-04-06 20:38:27,459 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 190 transitions. Word has length 27 [2022-04-06 20:38:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:27,459 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 190 transitions. [2022-04-06 20:38:27,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 190 transitions. [2022-04-06 20:38:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:38:27,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:27,460 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:27,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:27,682 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,SelfDestructingSolverStorable17 [2022-04-06 20:38:27,682 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 826659752, now seen corresponding path program 9 times [2022-04-06 20:38:27,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:27,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [242509669] [2022-04-06 20:38:27,684 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:27,684 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 826659752, now seen corresponding path program 10 times [2022-04-06 20:38:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:27,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672149785] [2022-04-06 20:38:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:27,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:27,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:27,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:27,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672149785] [2022-04-06 20:38:27,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672149785] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:27,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786387308] [2022-04-06 20:38:27,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:27,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:27,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:27,789 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:27,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:38:27,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:27,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:27,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:38:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:27,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:28,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786387308] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:28,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:28,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:38:28,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:28,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [242509669] [2022-04-06 20:38:28,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [242509669] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:28,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:28,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:38:28,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012657422] [2022-04-06 20:38:28,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:28,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:38:28,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:28,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:38:28,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:38:28,101 INFO L87 Difference]: Start difference. First operand 144 states and 190 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:28,565 INFO L93 Difference]: Finished difference Result 245 states and 358 transitions. [2022-04-06 20:38:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:38:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 20:38:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:28,568 INFO L225 Difference]: With dead ends: 245 [2022-04-06 20:38:28,568 INFO L226 Difference]: Without dead ends: 219 [2022-04-06 20:38:28,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:38:28,569 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 90 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:28,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 88 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:38:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-06 20:38:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 161. [2022-04-06 20:38:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.3461538461538463) internal successors, (210), 156 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 214 transitions. [2022-04-06 20:38:28,597 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 214 transitions. Word has length 27 [2022-04-06 20:38:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:28,598 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 214 transitions. [2022-04-06 20:38:28,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 214 transitions. [2022-04-06 20:38:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:38:28,599 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:28,599 INFO L499 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:28,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:28,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:28,800 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash -303013947, now seen corresponding path program 11 times [2022-04-06 20:38:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:28,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1623606504] [2022-04-06 20:38:28,802 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:28,802 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash -303013947, now seen corresponding path program 12 times [2022-04-06 20:38:28,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:28,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49316058] [2022-04-06 20:38:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:28,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:28,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:28,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49316058] [2022-04-06 20:38:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49316058] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210925565] [2022-04-06 20:38:28,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:28,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:28,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:28,932 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:28,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:38:28,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:28,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:28,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:38:28,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:38:29,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:38:29,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210925565] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:29,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:29,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 18 [2022-04-06 20:38:29,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:29,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1623606504] [2022-04-06 20:38:29,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1623606504] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:29,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:29,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:38:29,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772818567] [2022-04-06 20:38:29,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:29,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:38:29,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:38:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:38:29,114 INFO L87 Difference]: Start difference. First operand 161 states and 214 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:29,675 INFO L93 Difference]: Finished difference Result 271 states and 399 transitions. [2022-04-06 20:38:29,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:38:29,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:38:29,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:29,677 INFO L225 Difference]: With dead ends: 271 [2022-04-06 20:38:29,677 INFO L226 Difference]: Without dead ends: 245 [2022-04-06 20:38:29,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:38:29,678 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 105 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:29,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 102 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:29,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-04-06 20:38:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 178. [2022-04-06 20:38:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.3526011560693643) internal successors, (234), 173 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 238 transitions. [2022-04-06 20:38:29,716 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 238 transitions. Word has length 28 [2022-04-06 20:38:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:29,716 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 238 transitions. [2022-04-06 20:38:29,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 238 transitions. [2022-04-06 20:38:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:38:29,717 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:29,717 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:29,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 20:38:29,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:29,927 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:29,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:29,928 INFO L85 PathProgramCache]: Analyzing trace with hash 939274105, now seen corresponding path program 3 times [2022-04-06 20:38:29,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:29,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779564102] [2022-04-06 20:38:29,929 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:29,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:29,929 INFO L85 PathProgramCache]: Analyzing trace with hash 939274105, now seen corresponding path program 4 times [2022-04-06 20:38:29,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:29,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295108971] [2022-04-06 20:38:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:29,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:30,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:38:30,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295108971] [2022-04-06 20:38:30,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295108971] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589618684] [2022-04-06 20:38:30,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:30,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:30,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:30,035 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:30,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:38:30,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:30,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:30,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:38:30,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:38:30,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:38:30,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589618684] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:30,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:30,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 20:38:30,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:30,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779564102] [2022-04-06 20:38:30,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779564102] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:30,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:30,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:38:30,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977376573] [2022-04-06 20:38:30,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:30,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:38:30,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:30,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:38:30,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:38:30,233 INFO L87 Difference]: Start difference. First operand 178 states and 238 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:30,439 INFO L93 Difference]: Finished difference Result 285 states and 387 transitions. [2022-04-06 20:38:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:38:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 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 29 [2022-04-06 20:38:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:30,440 INFO L225 Difference]: With dead ends: 285 [2022-04-06 20:38:30,441 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 20:38:30,441 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:38:30,442 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:30,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 53 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 20:38:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2022-04-06 20:38:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.3518518518518519) internal successors, (219), 162 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 223 transitions. [2022-04-06 20:38:30,502 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 223 transitions. Word has length 29 [2022-04-06 20:38:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:30,502 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 223 transitions. [2022-04-06 20:38:30,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 223 transitions. [2022-04-06 20:38:30,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:38:30,503 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:30,503 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:30,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:30,718 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:30,719 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:30,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash -571931592, now seen corresponding path program 9 times [2022-04-06 20:38:30,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:30,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [247037293] [2022-04-06 20:38:30,720 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:30,720 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash -571931592, now seen corresponding path program 10 times [2022-04-06 20:38:30,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:30,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722959291] [2022-04-06 20:38:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:30,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:30,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:38:30,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:30,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722959291] [2022-04-06 20:38:30,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722959291] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:30,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13094451] [2022-04-06 20:38:30,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:30,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:30,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:30,808 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:30,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:38:30,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:30,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:30,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:38:30,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:38:30,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:38:30,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13094451] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:30,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:30,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2022-04-06 20:38:30,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:30,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [247037293] [2022-04-06 20:38:30,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [247037293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:30,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:30,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:38:30,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999219569] [2022-04-06 20:38:30,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:30,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:38:30,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:30,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:38:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:38:30,991 INFO L87 Difference]: Start difference. First operand 167 states and 223 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:31,236 INFO L93 Difference]: Finished difference Result 282 states and 395 transitions. [2022-04-06 20:38:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:38:31,239 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 29 [2022-04-06 20:38:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:31,242 INFO L225 Difference]: With dead ends: 282 [2022-04-06 20:38:31,242 INFO L226 Difference]: Without dead ends: 245 [2022-04-06 20:38:31,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:38:31,244 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:31,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 46 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:31,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-04-06 20:38:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2022-04-06 20:38:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.3508771929824561) internal successors, (231), 171 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 235 transitions. [2022-04-06 20:38:31,306 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 235 transitions. Word has length 29 [2022-04-06 20:38:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:31,306 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 235 transitions. [2022-04-06 20:38:31,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 235 transitions. [2022-04-06 20:38:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:38:31,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:31,307 INFO L499 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:31,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:31,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:31,529 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:31,530 INFO L85 PathProgramCache]: Analyzing trace with hash -963160248, now seen corresponding path program 13 times [2022-04-06 20:38:31,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:31,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [695158072] [2022-04-06 20:38:31,531 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:31,531 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash -963160248, now seen corresponding path program 14 times [2022-04-06 20:38:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:31,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667990437] [2022-04-06 20:38:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:31,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:31,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667990437] [2022-04-06 20:38:31,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667990437] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:31,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662426539] [2022-04-06 20:38:31,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:31,680 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:31,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:38:31,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:31,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:31,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:38:31,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:31,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:32,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662426539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:32,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:32,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:38:32,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:32,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [695158072] [2022-04-06 20:38:32,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [695158072] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:32,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:32,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:38:32,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596033491] [2022-04-06 20:38:32,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:32,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:38:32,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:32,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:38:32,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:38:32,008 INFO L87 Difference]: Start difference. First operand 176 states and 235 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:32,584 INFO L93 Difference]: Finished difference Result 330 states and 500 transitions. [2022-04-06 20:38:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:38:32,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:38:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:32,585 INFO L225 Difference]: With dead ends: 330 [2022-04-06 20:38:32,585 INFO L226 Difference]: Without dead ends: 298 [2022-04-06 20:38:32,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:38:32,586 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 101 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:32,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 110 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:38:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-04-06 20:38:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 194. [2022-04-06 20:38:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.3544973544973544) internal successors, (256), 189 states have internal predecessors, (256), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 260 transitions. [2022-04-06 20:38:32,636 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 260 transitions. Word has length 29 [2022-04-06 20:38:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:32,636 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 260 transitions. [2022-04-06 20:38:32,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 260 transitions. [2022-04-06 20:38:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:38:32,637 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:32,637 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:32,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:32,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:32,838 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:32,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1141944188, now seen corresponding path program 11 times [2022-04-06 20:38:32,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:32,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1541458313] [2022-04-06 20:38:32,839 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:32,839 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1141944188, now seen corresponding path program 12 times [2022-04-06 20:38:32,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:32,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949079455] [2022-04-06 20:38:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:32,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:32,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:32,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:32,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949079455] [2022-04-06 20:38:32,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949079455] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:32,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583859116] [2022-04-06 20:38:32,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:32,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:32,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:32,996 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:32,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:38:33,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:33,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:33,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:38:33,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:38:33,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 20:38:33,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583859116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:33,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:33,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-04-06 20:38:33,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1541458313] [2022-04-06 20:38:33,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1541458313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:33,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:33,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:38:33,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514942301] [2022-04-06 20:38:33,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:33,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:38:33,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:33,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:38:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:38:33,201 INFO L87 Difference]: Start difference. First operand 194 states and 260 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:34,030 INFO L93 Difference]: Finished difference Result 345 states and 498 transitions. [2022-04-06 20:38:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:38:34,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:38:34,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:34,036 INFO L225 Difference]: With dead ends: 345 [2022-04-06 20:38:34,036 INFO L226 Difference]: Without dead ends: 276 [2022-04-06 20:38:34,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=2598, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:38:34,037 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:34,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 70 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:38:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-04-06 20:38:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 231. [2022-04-06 20:38:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.3274336283185841) internal successors, (300), 226 states have internal predecessors, (300), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 304 transitions. [2022-04-06 20:38:34,110 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 304 transitions. Word has length 30 [2022-04-06 20:38:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:34,110 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 304 transitions. [2022-04-06 20:38:34,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 304 transitions. [2022-04-06 20:38:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:38:34,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:34,111 INFO L499 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:34,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:34,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:34,317 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:34,317 INFO L85 PathProgramCache]: Analyzing trace with hash 47140901, now seen corresponding path program 15 times [2022-04-06 20:38:34,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:34,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807594237] [2022-04-06 20:38:34,319 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:34,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash 47140901, now seen corresponding path program 16 times [2022-04-06 20:38:34,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:34,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630589421] [2022-04-06 20:38:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:34,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:34,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:34,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:34,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630589421] [2022-04-06 20:38:34,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630589421] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:34,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342737749] [2022-04-06 20:38:34,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:34,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:34,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:34,468 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:34,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:38:34,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:34,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:34,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:38:34,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:34,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:34,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342737749] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:34,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:34,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:38:34,827 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:34,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807594237] [2022-04-06 20:38:34,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807594237] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:34,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:34,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:38:34,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118166040] [2022-04-06 20:38:34,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:34,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:38:34,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:34,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:38:34,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:38:34,828 INFO L87 Difference]: Start difference. First operand 231 states and 304 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:35,558 INFO L93 Difference]: Finished difference Result 399 states and 595 transitions. [2022-04-06 20:38:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:38:35,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 20:38:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:35,560 INFO L225 Difference]: With dead ends: 399 [2022-04-06 20:38:35,560 INFO L226 Difference]: Without dead ends: 367 [2022-04-06 20:38:35,560 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=1287, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:38:35,561 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 112 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:35,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 125 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:38:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-04-06 20:38:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 251. [2022-04-06 20:38:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.3333333333333333) internal successors, (328), 246 states have internal predecessors, (328), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 332 transitions. [2022-04-06 20:38:35,643 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 332 transitions. Word has length 30 [2022-04-06 20:38:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:35,644 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 332 transitions. [2022-04-06 20:38:35,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 332 transitions. [2022-04-06 20:38:35,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:38:35,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:35,645 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:35,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:35,866 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,SelfDestructingSolverStorable24 [2022-04-06 20:38:35,866 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1301705448, now seen corresponding path program 17 times [2022-04-06 20:38:35,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:35,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [546076002] [2022-04-06 20:38:35,868 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:35,868 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:35,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1301705448, now seen corresponding path program 18 times [2022-04-06 20:38:35,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:35,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013654891] [2022-04-06 20:38:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:35,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:36,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:36,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:36,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013654891] [2022-04-06 20:38:36,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013654891] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:36,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908290338] [2022-04-06 20:38:36,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:36,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:36,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:36,075 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:36,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:38:36,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:36,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:38:36,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 20:38:36,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 20:38:36,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908290338] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:36,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:36,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 21 [2022-04-06 20:38:36,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:36,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [546076002] [2022-04-06 20:38:36,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [546076002] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:36,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:36,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:38:36,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753803851] [2022-04-06 20:38:36,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:36,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:38:36,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:36,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:38:36,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:38:36,268 INFO L87 Difference]: Start difference. First operand 251 states and 332 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:37,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:37,117 INFO L93 Difference]: Finished difference Result 431 states and 646 transitions. [2022-04-06 20:38:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:38:37,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:38:37,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:37,119 INFO L225 Difference]: With dead ends: 431 [2022-04-06 20:38:37,119 INFO L226 Difference]: Without dead ends: 399 [2022-04-06 20:38:37,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:38:37,120 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 129 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:37,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 132 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:38:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-04-06 20:38:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 271. [2022-04-06 20:38:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.3383458646616542) internal successors, (356), 266 states have internal predecessors, (356), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 360 transitions. [2022-04-06 20:38:37,212 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 360 transitions. Word has length 31 [2022-04-06 20:38:37,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:37,212 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 360 transitions. [2022-04-06 20:38:37,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 360 transitions. [2022-04-06 20:38:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:38:37,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:37,213 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:37,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:37,430 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,SelfDestructingSolverStorable25 [2022-04-06 20:38:37,430 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:37,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1760992374, now seen corresponding path program 13 times [2022-04-06 20:38:37,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:37,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012165229] [2022-04-06 20:38:37,431 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:37,431 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:37,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1760992374, now seen corresponding path program 14 times [2022-04-06 20:38:37,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:37,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748984976] [2022-04-06 20:38:37,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:37,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:37,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:38:37,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:37,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748984976] [2022-04-06 20:38:37,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748984976] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:37,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985661388] [2022-04-06 20:38:37,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:37,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:37,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:37,585 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:37,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:38:37,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:37,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:37,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:38:37,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 20:38:37,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 20:38:37,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985661388] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:37,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:37,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-04-06 20:38:37,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:37,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012165229] [2022-04-06 20:38:37,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012165229] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:37,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:37,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:38:37,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995223999] [2022-04-06 20:38:37,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:37,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:38:37,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:37,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:38:37,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:38:37,780 INFO L87 Difference]: Start difference. First operand 271 states and 360 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:38,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:38,373 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2022-04-06 20:38:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:38:38,374 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:38:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:38,374 INFO L225 Difference]: With dead ends: 380 [2022-04-06 20:38:38,375 INFO L226 Difference]: Without dead ends: 303 [2022-04-06 20:38:38,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:38:38,375 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 67 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:38,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 95 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:38:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-04-06 20:38:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 272. [2022-04-06 20:38:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.3295880149812733) internal successors, (355), 267 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 359 transitions. [2022-04-06 20:38:38,464 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 359 transitions. Word has length 32 [2022-04-06 20:38:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:38,465 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 359 transitions. [2022-04-06 20:38:38,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 359 transitions. [2022-04-06 20:38:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:38:38,465 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:38,466 INFO L499 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:38,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 20:38:38,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:38:38,666 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1538500741, now seen corresponding path program 19 times [2022-04-06 20:38:38,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:38,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882864100] [2022-04-06 20:38:38,668 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:38,668 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:38,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1538500741, now seen corresponding path program 20 times [2022-04-06 20:38:38,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:38,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676182344] [2022-04-06 20:38:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:38,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:38,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:38,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:38,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676182344] [2022-04-06 20:38:38,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676182344] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:38,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79226214] [2022-04-06 20:38:38,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:38,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:38,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:38,846 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:38,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:38:38,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:38,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:38,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:38:38,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:38,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:39,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79226214] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:39,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:39,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 20:38:39,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:39,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882864100] [2022-04-06 20:38:39,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882864100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:39,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:39,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:38:39,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702933407] [2022-04-06 20:38:39,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:39,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:38:39,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:39,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:38:39,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:38:39,275 INFO L87 Difference]: Start difference. First operand 272 states and 359 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:40,146 INFO L93 Difference]: Finished difference Result 464 states and 696 transitions. [2022-04-06 20:38:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:38:40,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:38:40,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:40,148 INFO L225 Difference]: With dead ends: 464 [2022-04-06 20:38:40,148 INFO L226 Difference]: Without dead ends: 432 [2022-04-06 20:38:40,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=1699, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:38:40,149 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 142 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:40,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 138 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:38:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-04-06 20:38:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 292. [2022-04-06 20:38:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.3344947735191637) internal successors, (383), 287 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 387 transitions. [2022-04-06 20:38:40,237 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 387 transitions. Word has length 32 [2022-04-06 20:38:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:40,237 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 387 transitions. [2022-04-06 20:38:40,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 387 transitions. [2022-04-06 20:38:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:38:40,238 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:40,238 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:40,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 20:38:40,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:40,459 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:40,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:40,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2109757017, now seen corresponding path program 15 times [2022-04-06 20:38:40,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:40,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497064963] [2022-04-06 20:38:40,460 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:40,460 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2109757017, now seen corresponding path program 16 times [2022-04-06 20:38:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:40,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805930432] [2022-04-06 20:38:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:40,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:40,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:38:40,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805930432] [2022-04-06 20:38:40,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805930432] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321537830] [2022-04-06 20:38:40,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:40,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:40,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:40,578 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:40,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:38:40,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:40,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:40,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:38:40,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:38:40,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:38:40,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321537830] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:40,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:40,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-04-06 20:38:40,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497064963] [2022-04-06 20:38:40,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497064963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:40,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:40,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:38:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163515807] [2022-04-06 20:38:40,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:40,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:38:40,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:40,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:38:40,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:38:40,799 INFO L87 Difference]: Start difference. First operand 292 states and 387 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:41,262 INFO L93 Difference]: Finished difference Result 518 states and 707 transitions. [2022-04-06 20:38:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:38:41,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:38:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:41,263 INFO L225 Difference]: With dead ends: 518 [2022-04-06 20:38:41,263 INFO L226 Difference]: Without dead ends: 471 [2022-04-06 20:38:41,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:38:41,264 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:41,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 60 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:38:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-04-06 20:38:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 302. [2022-04-06 20:38:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 297 states have (on average 1.3367003367003367) internal successors, (397), 297 states have internal predecessors, (397), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 401 transitions. [2022-04-06 20:38:41,364 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 401 transitions. Word has length 33 [2022-04-06 20:38:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:41,364 INFO L478 AbstractCegarLoop]: Abstraction has 302 states and 401 transitions. [2022-04-06 20:38:41,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 401 transitions. [2022-04-06 20:38:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:38:41,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:41,365 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:41,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 20:38:41,577 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,SelfDestructingSolverStorable28 [2022-04-06 20:38:41,577 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:41,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2118455400, now seen corresponding path program 17 times [2022-04-06 20:38:41,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:41,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113805706] [2022-04-06 20:38:41,578 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:41,579 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:41,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2118455400, now seen corresponding path program 18 times [2022-04-06 20:38:41,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:41,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478528578] [2022-04-06 20:38:41,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:41,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:41,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:41,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478528578] [2022-04-06 20:38:41,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478528578] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602673691] [2022-04-06 20:38:41,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:41,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:41,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:41,776 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:41,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:38:41,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:38:41,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:41,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:38:41,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:38:41,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:38:42,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602673691] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:42,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:42,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 22 [2022-04-06 20:38:42,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:42,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113805706] [2022-04-06 20:38:42,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113805706] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:42,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:42,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:38:42,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778190895] [2022-04-06 20:38:42,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:42,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:38:42,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:38:42,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:38:42,036 INFO L87 Difference]: Start difference. First operand 302 states and 401 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:43,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:43,428 INFO L93 Difference]: Finished difference Result 483 states and 706 transitions. [2022-04-06 20:38:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:38:43,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:38:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:43,430 INFO L225 Difference]: With dead ends: 483 [2022-04-06 20:38:43,430 INFO L226 Difference]: Without dead ends: 420 [2022-04-06 20:38:43,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=357, Invalid=4473, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:38:43,431 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 94 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:43,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 88 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:38:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-04-06 20:38:43,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 350. [2022-04-06 20:38:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.3246376811594203) internal successors, (457), 345 states have internal predecessors, (457), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 461 transitions. [2022-04-06 20:38:43,553 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 461 transitions. Word has length 33 [2022-04-06 20:38:43,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:43,553 INFO L478 AbstractCegarLoop]: Abstraction has 350 states and 461 transitions. [2022-04-06 20:38:43,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 461 transitions. [2022-04-06 20:38:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:38:43,554 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:43,554 INFO L499 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:43,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 20:38:43,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:43,767 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash 289220232, now seen corresponding path program 21 times [2022-04-06 20:38:43,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:43,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056606232] [2022-04-06 20:38:43,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:43,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:43,769 INFO L85 PathProgramCache]: Analyzing trace with hash 289220232, now seen corresponding path program 22 times [2022-04-06 20:38:43,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:43,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915668104] [2022-04-06 20:38:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:43,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:43,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:43,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:43,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915668104] [2022-04-06 20:38:43,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915668104] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:43,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025267440] [2022-04-06 20:38:43,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:43,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:43,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:43,963 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:43,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:38:44,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:44,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:44,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:38:44,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:44,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:44,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025267440] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:44,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:44,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:38:44,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056606232] [2022-04-06 20:38:44,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056606232] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:44,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:44,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:38:44,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585114312] [2022-04-06 20:38:44,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:44,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:38:44,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:44,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:38:44,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:38:44,485 INFO L87 Difference]: Start difference. First operand 350 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:45,569 INFO L93 Difference]: Finished difference Result 576 states and 858 transitions. [2022-04-06 20:38:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:38:45,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 20:38:45,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:45,571 INFO L225 Difference]: With dead ends: 576 [2022-04-06 20:38:45,571 INFO L226 Difference]: Without dead ends: 542 [2022-04-06 20:38:45,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=524, Invalid=1926, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:38:45,572 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 156 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2003 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:45,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 156 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2003 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:38:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-04-06 20:38:45,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 374. [2022-04-06 20:38:45,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 369 states have (on average 1.3306233062330624) internal successors, (491), 369 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 495 transitions. [2022-04-06 20:38:45,698 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 495 transitions. Word has length 33 [2022-04-06 20:38:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:45,698 INFO L478 AbstractCegarLoop]: Abstraction has 374 states and 495 transitions. [2022-04-06 20:38:45,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 495 transitions. [2022-04-06 20:38:45,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:38:45,699 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:45,699 INFO L499 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:45,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 20:38:45,910 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,SelfDestructingSolverStorable30 [2022-04-06 20:38:45,910 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:45,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:45,910 INFO L85 PathProgramCache]: Analyzing trace with hash 216230117, now seen corresponding path program 23 times [2022-04-06 20:38:45,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:45,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [163956132] [2022-04-06 20:38:45,911 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:45,911 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:45,911 INFO L85 PathProgramCache]: Analyzing trace with hash 216230117, now seen corresponding path program 24 times [2022-04-06 20:38:45,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:45,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115498689] [2022-04-06 20:38:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:45,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:46,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:46,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115498689] [2022-04-06 20:38:46,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115498689] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281129299] [2022-04-06 20:38:46,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:46,155 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:46,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:38:46,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:46,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:46,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:38:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 20:38:46,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 20:38:46,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281129299] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:46,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:46,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 21 [2022-04-06 20:38:46,325 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [163956132] [2022-04-06 20:38:46,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [163956132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:46,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:46,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:38:46,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966576474] [2022-04-06 20:38:46,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:46,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:38:46,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:38:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:38:46,326 INFO L87 Difference]: Start difference. First operand 374 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:47,485 INFO L93 Difference]: Finished difference Result 613 states and 917 transitions. [2022-04-06 20:38:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:38:47,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:38:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:47,487 INFO L225 Difference]: With dead ends: 613 [2022-04-06 20:38:47,487 INFO L226 Difference]: Without dead ends: 579 [2022-04-06 20:38:47,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:38:47,488 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 171 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:47,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 160 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:38:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-04-06 20:38:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 398. [2022-04-06 20:38:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 393 states have (on average 1.3358778625954197) internal successors, (525), 393 states have internal predecessors, (525), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 529 transitions. [2022-04-06 20:38:47,620 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 529 transitions. Word has length 34 [2022-04-06 20:38:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:47,620 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 529 transitions. [2022-04-06 20:38:47,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 529 transitions. [2022-04-06 20:38:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:38:47,622 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:47,622 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:47,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:47,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:47,827 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash 289270042, now seen corresponding path program 5 times [2022-04-06 20:38:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:47,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1982525231] [2022-04-06 20:38:47,828 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:47,828 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash 289270042, now seen corresponding path program 6 times [2022-04-06 20:38:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:47,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739187561] [2022-04-06 20:38:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:47,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:47,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:38:47,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:47,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739187561] [2022-04-06 20:38:47,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739187561] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:47,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196271777] [2022-04-06 20:38:47,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:47,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:47,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:47,933 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:47,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:38:47,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:47,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:38:47,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:38:48,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:38:48,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196271777] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:48,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:48,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-04-06 20:38:48,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:48,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1982525231] [2022-04-06 20:38:48,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1982525231] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:48,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:48,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:38:48,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415576526] [2022-04-06 20:38:48,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:48,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:38:48,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:48,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:38:48,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:38:48,176 INFO L87 Difference]: Start difference. First operand 398 states and 529 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:48,584 INFO L93 Difference]: Finished difference Result 660 states and 875 transitions. [2022-04-06 20:38:48,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:38:48,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 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 35 [2022-04-06 20:38:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:48,586 INFO L225 Difference]: With dead ends: 660 [2022-04-06 20:38:48,587 INFO L226 Difference]: Without dead ends: 533 [2022-04-06 20:38:48,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:38:48,588 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:48,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 64 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:38:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-04-06 20:38:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 382. [2022-04-06 20:38:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.3289124668435013) internal successors, (501), 377 states have internal predecessors, (501), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 505 transitions. [2022-04-06 20:38:48,758 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 505 transitions. Word has length 35 [2022-04-06 20:38:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:48,758 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 505 transitions. [2022-04-06 20:38:48,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 505 transitions. [2022-04-06 20:38:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:38:48,759 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:48,759 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:48,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:48,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:48,975 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:48,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1852705767, now seen corresponding path program 25 times [2022-04-06 20:38:48,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:48,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2102285425] [2022-04-06 20:38:48,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:48,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:48,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1852705767, now seen corresponding path program 26 times [2022-04-06 20:38:48,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:48,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734741552] [2022-04-06 20:38:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:48,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:49,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 20:38:49,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:49,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734741552] [2022-04-06 20:38:49,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734741552] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:49,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983966627] [2022-04-06 20:38:49,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:49,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:49,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:49,136 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:49,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:38:49,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:49,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:38:49,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:49,285 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 20:38:49,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 20:38:49,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983966627] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:49,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:49,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:38:49,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:49,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2102285425] [2022-04-06 20:38:49,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2102285425] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:49,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:49,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:38:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511085388] [2022-04-06 20:38:49,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:49,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:38:49,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:49,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:38:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:38:49,468 INFO L87 Difference]: Start difference. First operand 382 states and 505 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:49,986 INFO L93 Difference]: Finished difference Result 465 states and 610 transitions. [2022-04-06 20:38:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:38:49,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:38:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:49,988 INFO L225 Difference]: With dead ends: 465 [2022-04-06 20:38:49,988 INFO L226 Difference]: Without dead ends: 443 [2022-04-06 20:38:49,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:38:49,988 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:49,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 91 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:38:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-04-06 20:38:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 382. [2022-04-06 20:38:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.3262599469496021) internal successors, (500), 377 states have internal predecessors, (500), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 504 transitions. [2022-04-06 20:38:50,173 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 504 transitions. Word has length 35 [2022-04-06 20:38:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:50,173 INFO L478 AbstractCegarLoop]: Abstraction has 382 states and 504 transitions. [2022-04-06 20:38:50,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 504 transitions. [2022-04-06 20:38:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:38:50,174 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:50,174 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:50,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:50,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:50,397 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:50,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:50,398 INFO L85 PathProgramCache]: Analyzing trace with hash -945572984, now seen corresponding path program 19 times [2022-04-06 20:38:50,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:50,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [558785155] [2022-04-06 20:38:50,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:50,399 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:50,399 INFO L85 PathProgramCache]: Analyzing trace with hash -945572984, now seen corresponding path program 20 times [2022-04-06 20:38:50,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:50,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388559119] [2022-04-06 20:38:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:50,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:50,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:38:50,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:50,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388559119] [2022-04-06 20:38:50,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388559119] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:50,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144658314] [2022-04-06 20:38:50,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:50,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:50,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:50,578 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:50,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:38:50,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:50,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:50,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:38:50,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 20:38:50,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 20:38:50,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144658314] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:50,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:50,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 22 [2022-04-06 20:38:50,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:50,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [558785155] [2022-04-06 20:38:50,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [558785155] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:50,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:50,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:38:50,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651227516] [2022-04-06 20:38:50,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:50,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:38:50,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:50,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:38:50,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:38:50,827 INFO L87 Difference]: Start difference. First operand 382 states and 504 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:51,629 INFO L93 Difference]: Finished difference Result 519 states and 705 transitions. [2022-04-06 20:38:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:38:51,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:38:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:51,630 INFO L225 Difference]: With dead ends: 519 [2022-04-06 20:38:51,631 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 20:38:51,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:38:51,631 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 67 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:51,632 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 98 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:38:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 20:38:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 383. [2022-04-06 20:38:51,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.32010582010582) internal successors, (499), 378 states have internal predecessors, (499), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 503 transitions. [2022-04-06 20:38:51,784 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 503 transitions. Word has length 35 [2022-04-06 20:38:51,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:51,784 INFO L478 AbstractCegarLoop]: Abstraction has 383 states and 503 transitions. [2022-04-06 20:38:51,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:51,784 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 503 transitions. [2022-04-06 20:38:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:38:51,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:51,785 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:51,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 20:38:51,985 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,SelfDestructingSolverStorable34 [2022-04-06 20:38:51,985 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:51,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2046463448, now seen corresponding path program 27 times [2022-04-06 20:38:51,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:51,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1859621438] [2022-04-06 20:38:51,987 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:51,987 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2046463448, now seen corresponding path program 28 times [2022-04-06 20:38:51,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:51,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633254007] [2022-04-06 20:38:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:51,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:52,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:52,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:52,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633254007] [2022-04-06 20:38:52,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633254007] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:52,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113625373] [2022-04-06 20:38:52,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:52,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:52,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:52,223 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:52,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:38:52,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:52,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:52,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:38:52,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:52,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:52,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113625373] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:52,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:52,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:38:52,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:52,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1859621438] [2022-04-06 20:38:52,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1859621438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:52,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:52,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:38:52,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481367851] [2022-04-06 20:38:52,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:52,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:38:52,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:52,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:38:52,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:38:52,812 INFO L87 Difference]: Start difference. First operand 383 states and 503 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:54,099 INFO L93 Difference]: Finished difference Result 667 states and 1012 transitions. [2022-04-06 20:38:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:38:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:38:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:54,101 INFO L225 Difference]: With dead ends: 667 [2022-04-06 20:38:54,101 INFO L226 Difference]: Without dead ends: 629 [2022-04-06 20:38:54,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=658, Invalid=2422, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:38:54,102 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 167 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:54,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 173 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:38:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-04-06 20:38:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 406. [2022-04-06 20:38:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 401 states have (on average 1.3241895261845387) internal successors, (531), 401 states have internal predecessors, (531), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 535 transitions. [2022-04-06 20:38:54,262 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 535 transitions. Word has length 35 [2022-04-06 20:38:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:54,262 INFO L478 AbstractCegarLoop]: Abstraction has 406 states and 535 transitions. [2022-04-06 20:38:54,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:54,263 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 535 transitions. [2022-04-06 20:38:54,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:38:54,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:54,264 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:54,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:54,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 20:38:54,485 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:54,485 INFO L85 PathProgramCache]: Analyzing trace with hash -224601084, now seen corresponding path program 21 times [2022-04-06 20:38:54,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:54,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304419297] [2022-04-06 20:38:54,486 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:54,486 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:54,486 INFO L85 PathProgramCache]: Analyzing trace with hash -224601084, now seen corresponding path program 22 times [2022-04-06 20:38:54,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:54,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480548300] [2022-04-06 20:38:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:54,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:54,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:54,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480548300] [2022-04-06 20:38:54,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480548300] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471472366] [2022-04-06 20:38:54,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:38:54,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:54,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:54,704 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:54,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:38:54,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:38:54,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:54,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:38:54,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:38:54,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 20:38:54,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471472366] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:54,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:54,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2022-04-06 20:38:54,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304419297] [2022-04-06 20:38:54,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304419297] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:54,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:54,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:38:54,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91288990] [2022-04-06 20:38:54,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:54,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:38:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:54,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:38:54,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:38:54,988 INFO L87 Difference]: Start difference. First operand 406 states and 535 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:56,885 INFO L93 Difference]: Finished difference Result 645 states and 945 transitions. [2022-04-06 20:38:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:38:56,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:38:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:56,887 INFO L225 Difference]: With dead ends: 645 [2022-04-06 20:38:56,887 INFO L226 Difference]: Without dead ends: 566 [2022-04-06 20:38:56,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=464, Invalid=7192, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:38:56,889 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 117 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:56,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 101 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1874 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:38:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-04-06 20:38:57,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 445. [2022-04-06 20:38:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.3295454545454546) internal successors, (585), 440 states have internal predecessors, (585), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 589 transitions. [2022-04-06 20:38:57,094 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 589 transitions. Word has length 36 [2022-04-06 20:38:57,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:57,094 INFO L478 AbstractCegarLoop]: Abstraction has 445 states and 589 transitions. [2022-04-06 20:38:57,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 589 transitions. [2022-04-06 20:38:57,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:38:57,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:57,095 INFO L499 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:57,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:57,295 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:57,295 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:57,296 INFO L85 PathProgramCache]: Analyzing trace with hash 824480069, now seen corresponding path program 29 times [2022-04-06 20:38:57,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:57,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [870127893] [2022-04-06 20:38:57,297 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:57,297 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:57,297 INFO L85 PathProgramCache]: Analyzing trace with hash 824480069, now seen corresponding path program 30 times [2022-04-06 20:38:57,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:57,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222615389] [2022-04-06 20:38:57,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:57,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:38:57,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:57,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222615389] [2022-04-06 20:38:57,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222615389] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:57,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007894033] [2022-04-06 20:38:57,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:57,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:57,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:57,571 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:57,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:38:57,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:57,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:57,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:38:57,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-04-06 20:38:57,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-04-06 20:38:57,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007894033] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:57,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:57,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 23 [2022-04-06 20:38:57,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:57,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [870127893] [2022-04-06 20:38:57,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [870127893] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:57,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:57,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:38:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258698790] [2022-04-06 20:38:57,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:57,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:38:57,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:57,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:38:57,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:38:57,742 INFO L87 Difference]: Start difference. First operand 445 states and 589 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:59,146 INFO L93 Difference]: Finished difference Result 746 states and 1130 transitions. [2022-04-06 20:38:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:38:59,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 20:38:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:59,149 INFO L225 Difference]: With dead ends: 746 [2022-04-06 20:38:59,149 INFO L226 Difference]: Without dead ends: 708 [2022-04-06 20:38:59,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:38:59,150 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 180 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2728 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:59,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 179 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2728 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:38:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-04-06 20:38:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 470. [2022-04-06 20:38:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 465 states have (on average 1.3333333333333333) internal successors, (620), 465 states have internal predecessors, (620), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 624 transitions. [2022-04-06 20:38:59,325 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 624 transitions. Word has length 36 [2022-04-06 20:38:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:59,325 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 624 transitions. [2022-04-06 20:38:59,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 624 transitions. [2022-04-06 20:38:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:38:59,326 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:59,326 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:59,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:59,548 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,SelfDestructingSolverStorable37 [2022-04-06 20:38:59,548 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash 972307160, now seen corresponding path program 23 times [2022-04-06 20:38:59,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:59,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971419208] [2022-04-06 20:38:59,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:59,549 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:59,549 INFO L85 PathProgramCache]: Analyzing trace with hash 972307160, now seen corresponding path program 24 times [2022-04-06 20:38:59,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:59,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505492288] [2022-04-06 20:38:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:59,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:38:59,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:59,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505492288] [2022-04-06 20:38:59,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505492288] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:59,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017426926] [2022-04-06 20:38:59,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:59,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:59,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:59,707 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:59,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:38:59,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:38:59,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:38:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:38:59,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:38:59,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017426926] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:59,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:59,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2022-04-06 20:38:59,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971419208] [2022-04-06 20:38:59,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971419208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:59,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:59,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:38:59,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864070544] [2022-04-06 20:39:00,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:00,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:39:00,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:00,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:39:00,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:39:00,000 INFO L87 Difference]: Start difference. First operand 470 states and 624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:00,835 INFO L93 Difference]: Finished difference Result 911 states and 1204 transitions. [2022-04-06 20:39:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:39:00,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 37 [2022-04-06 20:39:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:00,837 INFO L225 Difference]: With dead ends: 911 [2022-04-06 20:39:00,837 INFO L226 Difference]: Without dead ends: 846 [2022-04-06 20:39:00,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:39:00,838 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 76 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:00,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 78 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:39:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-04-06 20:39:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 504. [2022-04-06 20:39:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 499 states have (on average 1.3226452905811623) internal successors, (660), 499 states have internal predecessors, (660), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 664 transitions. [2022-04-06 20:39:01,032 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 664 transitions. Word has length 37 [2022-04-06 20:39:01,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:01,032 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 664 transitions. [2022-04-06 20:39:01,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:01,032 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 664 transitions. [2022-04-06 20:39:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:39:01,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:01,033 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:01,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:01,233 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,SelfDestructingSolverStorable38 [2022-04-06 20:39:01,233 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:01,234 INFO L85 PathProgramCache]: Analyzing trace with hash 397617959, now seen corresponding path program 31 times [2022-04-06 20:39:01,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:01,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [53962732] [2022-04-06 20:39:01,235 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:01,235 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:01,235 INFO L85 PathProgramCache]: Analyzing trace with hash 397617959, now seen corresponding path program 32 times [2022-04-06 20:39:01,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:01,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996442723] [2022-04-06 20:39:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:01,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:01,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:39:01,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:01,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996442723] [2022-04-06 20:39:01,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996442723] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:01,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475719110] [2022-04-06 20:39:01,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:01,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:01,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:01,376 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:01,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:39:01,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:01,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:39:01,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:39:01,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:39:01,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475719110] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:01,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:01,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 20:39:01,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:01,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [53962732] [2022-04-06 20:39:01,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [53962732] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:01,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:01,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:39:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253500701] [2022-04-06 20:39:01,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:01,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:39:01,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:01,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:39:01,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:39:01,734 INFO L87 Difference]: Start difference. First operand 504 states and 664 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:02,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:02,415 INFO L93 Difference]: Finished difference Result 607 states and 791 transitions. [2022-04-06 20:39:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:39:02,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 37 [2022-04-06 20:39:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:02,416 INFO L225 Difference]: With dead ends: 607 [2022-04-06 20:39:02,417 INFO L226 Difference]: Without dead ends: 584 [2022-04-06 20:39:02,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:39:02,417 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 85 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:02,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 104 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:39:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-04-06 20:39:02,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 504. [2022-04-06 20:39:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 499 states have (on average 1.3206412825651304) internal successors, (659), 499 states have internal predecessors, (659), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 663 transitions. [2022-04-06 20:39:02,609 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 663 transitions. Word has length 37 [2022-04-06 20:39:02,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:02,610 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 663 transitions. [2022-04-06 20:39:02,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 663 transitions. [2022-04-06 20:39:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:39:02,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:02,611 INFO L499 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:02,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:02,827 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,SelfDestructingSolverStorable39 [2022-04-06 20:39:02,827 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash -370584120, now seen corresponding path program 33 times [2022-04-06 20:39:02,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:02,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [171595026] [2022-04-06 20:39:02,828 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:02,828 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash -370584120, now seen corresponding path program 34 times [2022-04-06 20:39:02,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:02,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346906802] [2022-04-06 20:39:02,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:02,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:03,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:03,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346906802] [2022-04-06 20:39:03,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346906802] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407057656] [2022-04-06 20:39:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:03,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:03,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:03,120 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:03,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:39:03,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:03,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:03,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:39:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:03,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:03,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407057656] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:03,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:03,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:39:03,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:03,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [171595026] [2022-04-06 20:39:03,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [171595026] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:03,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:03,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:39:03,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949068970] [2022-04-06 20:39:03,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:03,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:39:03,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:03,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:39:03,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1346, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:39:03,911 INFO L87 Difference]: Start difference. First operand 504 states and 663 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:05,510 INFO L93 Difference]: Finished difference Result 845 states and 1276 transitions. [2022-04-06 20:39:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:39:05,510 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:39:05,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:05,512 INFO L225 Difference]: With dead ends: 845 [2022-04-06 20:39:05,512 INFO L226 Difference]: Without dead ends: 805 [2022-04-06 20:39:05,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=808, Invalid=2974, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:39:05,513 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 195 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 3084 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 3084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:05,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 190 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 3084 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:39:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-04-06 20:39:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 531. [2022-04-06 20:39:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 526 states have (on average 1.3250950570342206) internal successors, (697), 526 states have internal predecessors, (697), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 701 transitions. [2022-04-06 20:39:05,717 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 701 transitions. Word has length 37 [2022-04-06 20:39:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:05,717 INFO L478 AbstractCegarLoop]: Abstraction has 531 states and 701 transitions. [2022-04-06 20:39:05,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 701 transitions. [2022-04-06 20:39:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:39:05,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:05,718 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:05,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 20:39:05,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:05,920 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1504778038, now seen corresponding path program 25 times [2022-04-06 20:39:05,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:05,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [959126834] [2022-04-06 20:39:05,921 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:05,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1504778038, now seen corresponding path program 26 times [2022-04-06 20:39:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:05,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205490833] [2022-04-06 20:39:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:05,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:06,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:39:06,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:06,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205490833] [2022-04-06 20:39:06,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205490833] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:06,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391205601] [2022-04-06 20:39:06,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:06,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:06,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:06,139 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:06,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:39:06,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:06,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:39:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:39:06,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:39:06,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391205601] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:06,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:06,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2022-04-06 20:39:06,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:06,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [959126834] [2022-04-06 20:39:06,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [959126834] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:06,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:06,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:39:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766203973] [2022-04-06 20:39:06,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:06,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:39:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:06,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:39:06,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:39:06,409 INFO L87 Difference]: Start difference. First operand 531 states and 701 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:07,521 INFO L93 Difference]: Finished difference Result 697 states and 939 transitions. [2022-04-06 20:39:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:39:07,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:39:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:07,523 INFO L225 Difference]: With dead ends: 697 [2022-04-06 20:39:07,523 INFO L226 Difference]: Without dead ends: 575 [2022-04-06 20:39:07,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:39:07,524 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 79 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:07,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 106 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-04-06 20:39:07,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 532. [2022-04-06 20:39:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 527 states have (on average 1.3187855787476281) internal successors, (695), 527 states have internal predecessors, (695), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 699 transitions. [2022-04-06 20:39:07,792 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 699 transitions. Word has length 38 [2022-04-06 20:39:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:07,792 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 699 transitions. [2022-04-06 20:39:07,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:07,792 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 699 transitions. [2022-04-06 20:39:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:39:07,793 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:07,793 INFO L499 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:07,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:08,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:08,007 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1237131685, now seen corresponding path program 35 times [2022-04-06 20:39:08,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:08,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1081402557] [2022-04-06 20:39:08,008 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:08,008 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1237131685, now seen corresponding path program 36 times [2022-04-06 20:39:08,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964132940] [2022-04-06 20:39:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:08,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:08,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:08,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:08,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964132940] [2022-04-06 20:39:08,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964132940] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:08,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465944428] [2022-04-06 20:39:08,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:08,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:08,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:08,339 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:08,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:39:08,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:39:08,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:08,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:39:08,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-04-06 20:39:08,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-04-06 20:39:08,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465944428] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:08,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:08,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 4, 4] total 25 [2022-04-06 20:39:08,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:08,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1081402557] [2022-04-06 20:39:08,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1081402557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:08,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:08,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:39:08,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809673683] [2022-04-06 20:39:08,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:08,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:39:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:39:08,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:39:08,538 INFO L87 Difference]: Start difference. First operand 532 states and 699 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:10,333 INFO L93 Difference]: Finished difference Result 889 states and 1343 transitions. [2022-04-06 20:39:10,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:39:10,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:39:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:10,335 INFO L225 Difference]: With dead ends: 889 [2022-04-06 20:39:10,335 INFO L226 Difference]: Without dead ends: 849 [2022-04-06 20:39:10,336 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1923, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:39:10,336 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 208 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3463 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 3609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 3463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:10,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 201 Invalid, 3609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 3463 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:39:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-04-06 20:39:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 559. [2022-04-06 20:39:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 554 states have (on average 1.3231046931407942) internal successors, (733), 554 states have internal predecessors, (733), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 737 transitions. [2022-04-06 20:39:10,552 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 737 transitions. Word has length 38 [2022-04-06 20:39:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:10,552 INFO L478 AbstractCegarLoop]: Abstraction has 559 states and 737 transitions. [2022-04-06 20:39:10,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 737 transitions. [2022-04-06 20:39:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:39:10,554 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:10,554 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:10,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-04-06 20:39:10,762 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,SelfDestructingSolverStorable42 [2022-04-06 20:39:10,762 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash -439094120, now seen corresponding path program 27 times [2022-04-06 20:39:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:10,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107816653] [2022-04-06 20:39:10,763 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:10,764 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:10,764 INFO L85 PathProgramCache]: Analyzing trace with hash -439094120, now seen corresponding path program 28 times [2022-04-06 20:39:10,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:10,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085290097] [2022-04-06 20:39:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:10,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:11,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:11,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085290097] [2022-04-06 20:39:11,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085290097] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311836369] [2022-04-06 20:39:11,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:11,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:11,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:11,035 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:11,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:39:11,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:11,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:39:11,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:39:11,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 20:39:11,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311836369] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:11,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:11,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-04-06 20:39:11,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:11,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107816653] [2022-04-06 20:39:11,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107816653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:11,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:11,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:39:11,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926040448] [2022-04-06 20:39:11,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:11,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:39:11,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:11,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:39:11,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:39:11,366 INFO L87 Difference]: Start difference. First operand 559 states and 737 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:14,166 INFO L93 Difference]: Finished difference Result 856 states and 1254 transitions. [2022-04-06 20:39:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 20:39:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:39:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:14,168 INFO L225 Difference]: With dead ends: 856 [2022-04-06 20:39:14,168 INFO L226 Difference]: Without dead ends: 767 [2022-04-06 20:39:14,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3098 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=585, Invalid=10971, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:39:14,170 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 141 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3034 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 3034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:14,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 121 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 3034 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:39:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-04-06 20:39:14,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 605. [2022-04-06 20:39:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 600 states have (on average 1.3283333333333334) internal successors, (797), 600 states have internal predecessors, (797), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 801 transitions. [2022-04-06 20:39:14,471 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 801 transitions. Word has length 39 [2022-04-06 20:39:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:14,471 INFO L478 AbstractCegarLoop]: Abstraction has 605 states and 801 transitions. [2022-04-06 20:39:14,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 801 transitions. [2022-04-06 20:39:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:39:14,472 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:14,472 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:14,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 20:39:14,686 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-04-06 20:39:14,686 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash 932823321, now seen corresponding path program 37 times [2022-04-06 20:39:14,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:14,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [345414577] [2022-04-06 20:39:14,687 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:14,687 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash 932823321, now seen corresponding path program 38 times [2022-04-06 20:39:14,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:14,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162964127] [2022-04-06 20:39:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:14,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:14,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:39:14,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162964127] [2022-04-06 20:39:14,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162964127] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573810246] [2022-04-06 20:39:14,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:14,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:14,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:14,854 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:14,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:39:14,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:14,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:14,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:39:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:39:15,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:39:15,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573810246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:15,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:15,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:39:15,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:15,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [345414577] [2022-04-06 20:39:15,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [345414577] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:15,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:15,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:39:15,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348983587] [2022-04-06 20:39:15,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:15,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:39:15,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:15,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:39:15,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:39:15,314 INFO L87 Difference]: Start difference. First operand 605 states and 801 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:16,172 INFO L93 Difference]: Finished difference Result 716 states and 938 transitions. [2022-04-06 20:39:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:39:16,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:39:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:16,174 INFO L225 Difference]: With dead ends: 716 [2022-04-06 20:39:16,174 INFO L226 Difference]: Without dead ends: 692 [2022-04-06 20:39:16,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=374, Invalid=1432, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:39:16,174 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:16,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 103 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:39:16,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-04-06 20:39:16,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 605. [2022-04-06 20:39:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 600 states have (on average 1.3266666666666667) internal successors, (796), 600 states have internal predecessors, (796), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 800 transitions. [2022-04-06 20:39:16,440 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 800 transitions. Word has length 39 [2022-04-06 20:39:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:16,440 INFO L478 AbstractCegarLoop]: Abstraction has 605 states and 800 transitions. [2022-04-06 20:39:16,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 800 transitions. [2022-04-06 20:39:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:39:16,441 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:16,441 INFO L499 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:16,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:16,655 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,SelfDestructingSolverStorable44 [2022-04-06 20:39:16,655 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:16,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:16,656 INFO L85 PathProgramCache]: Analyzing trace with hash -463285912, now seen corresponding path program 39 times [2022-04-06 20:39:16,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:16,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796890095] [2022-04-06 20:39:16,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:16,657 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash -463285912, now seen corresponding path program 40 times [2022-04-06 20:39:16,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:16,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35070461] [2022-04-06 20:39:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:16,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:16,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:16,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:16,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35070461] [2022-04-06 20:39:16,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35070461] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:16,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992882492] [2022-04-06 20:39:16,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:16,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:16,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:16,999 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:17,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:39:17,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:17,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:17,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:39:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:17,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:17,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992882492] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:17,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:17,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:39:17,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796890095] [2022-04-06 20:39:17,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796890095] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:17,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:17,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:39:17,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399242100] [2022-04-06 20:39:17,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:17,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:39:17,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:39:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:39:17,814 INFO L87 Difference]: Start difference. First operand 605 states and 800 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:19,807 INFO L93 Difference]: Finished difference Result 980 states and 1478 transitions. [2022-04-06 20:39:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:39:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 20:39:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:19,810 INFO L225 Difference]: With dead ends: 980 [2022-04-06 20:39:19,810 INFO L226 Difference]: Without dead ends: 940 [2022-04-06 20:39:19,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=974, Invalid=3582, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:39:19,811 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 223 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3864 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 3864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:19,811 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 212 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 3864 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:39:19,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-04-06 20:39:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 634. [2022-04-06 20:39:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 629 states have (on average 1.330683624801272) internal successors, (837), 629 states have internal predecessors, (837), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 841 transitions. [2022-04-06 20:39:20,096 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 841 transitions. Word has length 39 [2022-04-06 20:39:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:20,096 INFO L478 AbstractCegarLoop]: Abstraction has 634 states and 841 transitions. [2022-04-06 20:39:20,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 841 transitions. [2022-04-06 20:39:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:39:20,097 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:20,097 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:20,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 20:39:20,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 20:39:20,298 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:20,298 INFO L85 PathProgramCache]: Analyzing trace with hash 794869508, now seen corresponding path program 29 times [2022-04-06 20:39:20,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:20,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [832658926] [2022-04-06 20:39:20,299 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:20,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:20,299 INFO L85 PathProgramCache]: Analyzing trace with hash 794869508, now seen corresponding path program 30 times [2022-04-06 20:39:20,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:20,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270667538] [2022-04-06 20:39:20,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:20,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:20,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:39:20,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:20,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270667538] [2022-04-06 20:39:20,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270667538] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:20,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559049638] [2022-04-06 20:39:20,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:20,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:20,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:20,536 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:20,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:39:20,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:39:20,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:20,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:39:20,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:39:20,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 20:39:21,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559049638] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:21,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:21,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 16] total 40 [2022-04-06 20:39:21,321 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:21,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [832658926] [2022-04-06 20:39:21,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [832658926] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:21,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:21,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:39:21,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943719026] [2022-04-06 20:39:21,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:21,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:39:21,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:21,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:39:21,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:39:21,322 INFO L87 Difference]: Start difference. First operand 634 states and 841 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:22,729 INFO L93 Difference]: Finished difference Result 814 states and 1099 transitions. [2022-04-06 20:39:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:39:22,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 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 40 [2022-04-06 20:39:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:22,730 INFO L225 Difference]: With dead ends: 814 [2022-04-06 20:39:22,730 INFO L226 Difference]: Without dead ends: 682 [2022-04-06 20:39:22,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=608, Invalid=4794, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:39:22,731 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 99 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:22,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 126 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-04-06 20:39:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 635. [2022-04-06 20:39:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 630 states have (on average 1.3253968253968254) internal successors, (835), 630 states have internal predecessors, (835), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 839 transitions. [2022-04-06 20:39:23,013 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 839 transitions. Word has length 40 [2022-04-06 20:39:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:23,013 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 839 transitions. [2022-04-06 20:39:23,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 839 transitions. [2022-04-06 20:39:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:39:23,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:23,014 INFO L499 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:23,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:23,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:23,231 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:23,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1636623867, now seen corresponding path program 41 times [2022-04-06 20:39:23,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:23,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1042562101] [2022-04-06 20:39:23,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:23,233 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:23,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1636623867, now seen corresponding path program 42 times [2022-04-06 20:39:23,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:23,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819777481] [2022-04-06 20:39:23,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:23,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:23,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:23,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:23,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819777481] [2022-04-06 20:39:23,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819777481] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:23,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905373479] [2022-04-06 20:39:23,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:23,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:23,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:23,597 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:23,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:39:23,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:39:23,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:39:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-04-06 20:39:23,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-04-06 20:39:23,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905373479] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:23,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:23,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 27 [2022-04-06 20:39:23,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:23,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1042562101] [2022-04-06 20:39:23,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1042562101] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:23,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:23,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:39:23,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144507772] [2022-04-06 20:39:23,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:23,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:39:23,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:39:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:39:23,798 INFO L87 Difference]: Start difference. First operand 635 states and 839 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:25,937 INFO L93 Difference]: Finished difference Result 1026 states and 1548 transitions. [2022-04-06 20:39:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:39:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:39:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:25,940 INFO L225 Difference]: With dead ends: 1026 [2022-04-06 20:39:25,940 INFO L226 Difference]: Without dead ends: 986 [2022-04-06 20:39:25,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=2291, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:39:25,941 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 236 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4287 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 4451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 4287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:25,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 223 Invalid, 4451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 4287 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:39:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-04-06 20:39:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 664. [2022-04-06 20:39:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 659 states have (on average 1.3292867981790593) internal successors, (876), 659 states have internal predecessors, (876), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 880 transitions. [2022-04-06 20:39:26,232 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 880 transitions. Word has length 40 [2022-04-06 20:39:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:26,232 INFO L478 AbstractCegarLoop]: Abstraction has 664 states and 880 transitions. [2022-04-06 20:39:26,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 880 transitions. [2022-04-06 20:39:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:39:26,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:26,233 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:26,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 20:39:26,433 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,SelfDestructingSolverStorable47 [2022-04-06 20:39:26,433 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1046867033, now seen corresponding path program 7 times [2022-04-06 20:39:26,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:26,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1120960704] [2022-04-06 20:39:26,434 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:26,435 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:26,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1046867033, now seen corresponding path program 8 times [2022-04-06 20:39:26,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:26,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769638951] [2022-04-06 20:39:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:26,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:26,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:39:26,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:26,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769638951] [2022-04-06 20:39:26,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769638951] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:26,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166501592] [2022-04-06 20:39:26,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:26,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:26,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:26,580 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:26,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:39:26,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:26,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:26,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:39:26,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:39:26,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:39:26,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166501592] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:26,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:26,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-04-06 20:39:26,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:26,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1120960704] [2022-04-06 20:39:26,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1120960704] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:26,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:26,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:39:26,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650244928] [2022-04-06 20:39:26,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:26,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:39:26,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:26,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:39:26,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:39:26,813 INFO L87 Difference]: Start difference. First operand 664 states and 880 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:27,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:27,863 INFO L93 Difference]: Finished difference Result 1209 states and 1562 transitions. [2022-04-06 20:39:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:39:27,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:39:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:27,866 INFO L225 Difference]: With dead ends: 1209 [2022-04-06 20:39:27,866 INFO L226 Difference]: Without dead ends: 1018 [2022-04-06 20:39:27,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:39:27,867 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:27,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 75 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:39:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-04-06 20:39:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 641. [2022-04-06 20:39:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 636 states have (on average 1.3223270440251573) internal successors, (841), 636 states have internal predecessors, (841), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 845 transitions. [2022-04-06 20:39:28,185 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 845 transitions. Word has length 41 [2022-04-06 20:39:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:28,185 INFO L478 AbstractCegarLoop]: Abstraction has 641 states and 845 transitions. [2022-04-06 20:39:28,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:28,185 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 845 transitions. [2022-04-06 20:39:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:39:28,186 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:28,186 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:28,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:28,408 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,SelfDestructingSolverStorable48 [2022-04-06 20:39:28,409 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:28,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1107564487, now seen corresponding path program 31 times [2022-04-06 20:39:28,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:28,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1521463758] [2022-04-06 20:39:28,410 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:28,410 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:28,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1107564487, now seen corresponding path program 32 times [2022-04-06 20:39:28,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:28,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818076792] [2022-04-06 20:39:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:28,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:28,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:39:28,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818076792] [2022-04-06 20:39:28,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818076792] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832868687] [2022-04-06 20:39:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:28,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:28,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:28,587 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:28,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:39:28,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:28,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:28,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:39:28,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:39:28,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:39:28,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832868687] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:28,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:28,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2022-04-06 20:39:28,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:28,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1521463758] [2022-04-06 20:39:28,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1521463758] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:28,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:28,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:39:28,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829759227] [2022-04-06 20:39:28,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:28,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:39:28,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:39:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:39:28,872 INFO L87 Difference]: Start difference. First operand 641 states and 845 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:30,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:30,202 INFO L93 Difference]: Finished difference Result 1261 states and 1656 transitions. [2022-04-06 20:39:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:39:30,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 41 [2022-04-06 20:39:30,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:30,205 INFO L225 Difference]: With dead ends: 1261 [2022-04-06 20:39:30,205 INFO L226 Difference]: Without dead ends: 1175 [2022-04-06 20:39:30,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:39:30,206 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 93 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:30,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 82 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-04-06 20:39:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 682. [2022-04-06 20:39:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 677 states have (on average 1.31314623338257) internal successors, (889), 677 states have internal predecessors, (889), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 893 transitions. [2022-04-06 20:39:30,538 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 893 transitions. Word has length 41 [2022-04-06 20:39:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:30,539 INFO L478 AbstractCegarLoop]: Abstraction has 682 states and 893 transitions. [2022-04-06 20:39:30,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 893 transitions. [2022-04-06 20:39:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:39:30,539 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:30,540 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:30,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 20:39:30,740 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,SelfDestructingSolverStorable49 [2022-04-06 20:39:30,740 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash -176025528, now seen corresponding path program 33 times [2022-04-06 20:39:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:30,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1326918208] [2022-04-06 20:39:30,741 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:30,741 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:30,741 INFO L85 PathProgramCache]: Analyzing trace with hash -176025528, now seen corresponding path program 34 times [2022-04-06 20:39:30,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:30,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993991741] [2022-04-06 20:39:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:30,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:30,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:39:30,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:30,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993991741] [2022-04-06 20:39:30,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993991741] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:30,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641539951] [2022-04-06 20:39:30,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:30,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:30,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:30,983 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:30,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:39:31,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:31,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:31,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:39:31,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 20:39:31,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 20:39:31,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641539951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:31,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:31,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-04-06 20:39:31,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:31,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1326918208] [2022-04-06 20:39:31,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1326918208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:31,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:31,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:39:31,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23822678] [2022-04-06 20:39:31,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:31,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:39:31,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:31,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:39:31,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:39:31,301 INFO L87 Difference]: Start difference. First operand 682 states and 893 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:32,814 INFO L93 Difference]: Finished difference Result 837 states and 1138 transitions. [2022-04-06 20:39:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:39:32,815 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:39:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:32,817 INFO L225 Difference]: With dead ends: 837 [2022-04-06 20:39:32,817 INFO L226 Difference]: Without dead ends: 735 [2022-04-06 20:39:32,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=3610, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:39:32,817 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 78 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:32,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 131 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-04-06 20:39:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 683. [2022-04-06 20:39:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.3126843657817109) internal successors, (890), 678 states have internal predecessors, (890), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 894 transitions. [2022-04-06 20:39:33,143 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 894 transitions. Word has length 41 [2022-04-06 20:39:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:33,143 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 894 transitions. [2022-04-06 20:39:33,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 894 transitions. [2022-04-06 20:39:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:39:33,144 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:33,144 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:33,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-06 20:39:33,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:33,344 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:33,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:33,345 INFO L85 PathProgramCache]: Analyzing trace with hash 30999719, now seen corresponding path program 43 times [2022-04-06 20:39:33,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:33,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [922707537] [2022-04-06 20:39:33,346 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:33,346 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:33,346 INFO L85 PathProgramCache]: Analyzing trace with hash 30999719, now seen corresponding path program 44 times [2022-04-06 20:39:33,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:33,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456567979] [2022-04-06 20:39:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:33,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:33,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 20:39:33,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:33,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456567979] [2022-04-06 20:39:33,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456567979] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:33,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139148756] [2022-04-06 20:39:33,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:33,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:33,512 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:33,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:39:33,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:33,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:33,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:39:33,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:39:33,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:39:34,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139148756] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:34,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:34,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 44 [2022-04-06 20:39:34,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:34,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [922707537] [2022-04-06 20:39:34,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [922707537] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:34,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:34,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:39:34,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202615823] [2022-04-06 20:39:34,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:34,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:39:34,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:39:34,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1596, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:39:34,304 INFO L87 Difference]: Start difference. First operand 683 states and 894 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:35,400 INFO L93 Difference]: Finished difference Result 824 states and 1067 transitions. [2022-04-06 20:39:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:39:35,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 41 [2022-04-06 20:39:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:35,403 INFO L225 Difference]: With dead ends: 824 [2022-04-06 20:39:35,403 INFO L226 Difference]: Without dead ends: 799 [2022-04-06 20:39:35,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:39:35,403 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 100 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:35,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 123 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:39:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-04-06 20:39:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 683. [2022-04-06 20:39:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.3112094395280236) internal successors, (889), 678 states have internal predecessors, (889), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 893 transitions. [2022-04-06 20:39:35,726 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 893 transitions. Word has length 41 [2022-04-06 20:39:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:35,726 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 893 transitions. [2022-04-06 20:39:35,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 893 transitions. [2022-04-06 20:39:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:39:35,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:35,727 INFO L499 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:35,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 20:39:35,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:35,936 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:35,936 INFO L85 PathProgramCache]: Analyzing trace with hash 644605192, now seen corresponding path program 45 times [2022-04-06 20:39:35,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:35,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1320729968] [2022-04-06 20:39:35,937 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:35,937 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash 644605192, now seen corresponding path program 46 times [2022-04-06 20:39:35,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:35,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328375758] [2022-04-06 20:39:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:35,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:36,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:36,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:36,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328375758] [2022-04-06 20:39:36,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328375758] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692806802] [2022-04-06 20:39:36,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:36,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:36,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:36,347 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:36,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:39:36,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:36,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:36,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:39:36,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:36,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:37,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692806802] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:37,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:37,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:39:37,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:37,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1320729968] [2022-04-06 20:39:37,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1320729968] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:37,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:37,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:39:37,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693752089] [2022-04-06 20:39:37,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:37,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:39:37,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:37,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:39:37,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1906, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:39:37,289 INFO L87 Difference]: Start difference. First operand 683 states and 893 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:39,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:39,748 INFO L93 Difference]: Finished difference Result 1164 states and 1771 transitions. [2022-04-06 20:39:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:39:39,749 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:39:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:39,752 INFO L225 Difference]: With dead ends: 1164 [2022-04-06 20:39:39,752 INFO L226 Difference]: Without dead ends: 1118 [2022-04-06 20:39:39,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1156, Invalid=4246, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:39:39,752 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 230 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4860 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 5024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 4860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:39,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 236 Invalid, 5024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 4860 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:39:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-04-06 20:39:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 713. [2022-04-06 20:39:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 708 states have (on average 1.3149717514124293) internal successors, (931), 708 states have internal predecessors, (931), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 935 transitions. [2022-04-06 20:39:40,111 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 935 transitions. Word has length 41 [2022-04-06 20:39:40,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:40,111 INFO L478 AbstractCegarLoop]: Abstraction has 713 states and 935 transitions. [2022-04-06 20:39:40,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 935 transitions. [2022-04-06 20:39:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:39:40,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:40,112 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:40,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-06 20:39:40,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:40,313 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash -209000572, now seen corresponding path program 35 times [2022-04-06 20:39:40,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:40,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1343182059] [2022-04-06 20:39:40,314 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:40,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash -209000572, now seen corresponding path program 36 times [2022-04-06 20:39:40,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:40,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977187815] [2022-04-06 20:39:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:40,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:40,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:40,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:40,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977187815] [2022-04-06 20:39:40,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977187815] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:40,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707494218] [2022-04-06 20:39:40,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:40,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:40,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:40,619 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:40,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:39:40,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:39:40,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:40,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:39:40,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:40,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:41,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707494218] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:41,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:41,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 40 [2022-04-06 20:39:41,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:41,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1343182059] [2022-04-06 20:39:41,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1343182059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:41,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:41,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:39:41,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023516037] [2022-04-06 20:39:41,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:41,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:39:41,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:41,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:39:41,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:39:41,433 INFO L87 Difference]: Start difference. First operand 713 states and 935 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:44,885 INFO L93 Difference]: Finished difference Result 1081 states and 1583 transitions. [2022-04-06 20:39:44,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 20:39:44,885 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:39:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:44,887 INFO L225 Difference]: With dead ends: 1081 [2022-04-06 20:39:44,887 INFO L226 Difference]: Without dead ends: 975 [2022-04-06 20:39:44,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4870 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2478, Invalid=16704, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:39:44,888 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 150 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3846 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 3846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:44,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 130 Invalid, 4275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 3846 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:39:44,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-04-06 20:39:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 766. [2022-04-06 20:39:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 761 states have (on average 1.3206307490144547) internal successors, (1005), 761 states have internal predecessors, (1005), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1009 transitions. [2022-04-06 20:39:45,332 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1009 transitions. Word has length 42 [2022-04-06 20:39:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:45,332 INFO L478 AbstractCegarLoop]: Abstraction has 766 states and 1009 transitions. [2022-04-06 20:39:45,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1009 transitions. [2022-04-06 20:39:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:39:45,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:45,333 INFO L499 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:45,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-04-06 20:39:45,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 20:39:45,533 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1651738011, now seen corresponding path program 47 times [2022-04-06 20:39:45,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:45,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414622849] [2022-04-06 20:39:45,534 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:45,534 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1651738011, now seen corresponding path program 48 times [2022-04-06 20:39:45,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:45,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917339402] [2022-04-06 20:39:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:45,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:45,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:45,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:45,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917339402] [2022-04-06 20:39:45,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917339402] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:45,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130606947] [2022-04-06 20:39:45,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:45,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:45,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:45,910 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:45,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:39:45,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:39:45,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:45,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:39:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-04-06 20:39:46,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-04-06 20:39:46,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130606947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:46,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:46,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 6, 5] total 33 [2022-04-06 20:39:46,195 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:46,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414622849] [2022-04-06 20:39:46,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414622849] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:46,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:46,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:39:46,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605068226] [2022-04-06 20:39:46,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:46,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:39:46,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:39:46,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=980, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:39:46,196 INFO L87 Difference]: Start difference. First operand 766 states and 1009 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:48,938 INFO L93 Difference]: Finished difference Result 1268 states and 1927 transitions. [2022-04-06 20:39:48,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:39:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 20:39:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:48,941 INFO L225 Difference]: With dead ends: 1268 [2022-04-06 20:39:48,941 INFO L226 Difference]: Without dead ends: 1222 [2022-04-06 20:39:48,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=194, Invalid=3112, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:39:48,942 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 246 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 5334 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 5508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 5334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:48,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 247 Invalid, 5508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 5334 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:39:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-04-06 20:39:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 798. [2022-04-06 20:39:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 793 states have (on average 1.3240857503152585) internal successors, (1050), 793 states have internal predecessors, (1050), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1054 transitions. [2022-04-06 20:39:49,404 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1054 transitions. Word has length 42 [2022-04-06 20:39:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:49,404 INFO L478 AbstractCegarLoop]: Abstraction has 798 states and 1054 transitions. [2022-04-06 20:39:49,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1054 transitions. [2022-04-06 20:39:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:39:49,405 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:49,405 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:49,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:49,606 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,SelfDestructingSolverStorable54 [2022-04-06 20:39:49,606 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1064258088, now seen corresponding path program 37 times [2022-04-06 20:39:49,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2001025066] [2022-04-06 20:39:49,608 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:49,608 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:49,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1064258088, now seen corresponding path program 38 times [2022-04-06 20:39:49,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:49,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326191736] [2022-04-06 20:39:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:49,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:49,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:39:49,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:49,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326191736] [2022-04-06 20:39:49,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326191736] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:49,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670080746] [2022-04-06 20:39:49,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:49,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:49,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:49,912 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:49,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:39:49,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:49,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:49,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 20:39:49,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 20:39:50,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 20:39:50,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670080746] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:50,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:50,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 10] total 29 [2022-04-06 20:39:50,293 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:50,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2001025066] [2022-04-06 20:39:50,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2001025066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:50,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:50,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:39:50,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086387587] [2022-04-06 20:39:50,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:50,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:39:50,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:50,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:39:50,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:39:50,296 INFO L87 Difference]: Start difference. First operand 798 states and 1054 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:52,146 INFO L93 Difference]: Finished difference Result 1024 states and 1376 transitions. [2022-04-06 20:39:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:39:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 43 [2022-04-06 20:39:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:52,151 INFO L225 Difference]: With dead ends: 1024 [2022-04-06 20:39:52,151 INFO L226 Difference]: Without dead ends: 855 [2022-04-06 20:39:52,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=332, Invalid=4360, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:39:52,153 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 100 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:52,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 126 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:39:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-04-06 20:39:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 799. [2022-04-06 20:39:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 794 states have (on average 1.318639798488665) internal successors, (1047), 794 states have internal predecessors, (1047), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1051 transitions. [2022-04-06 20:39:52,630 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1051 transitions. Word has length 43 [2022-04-06 20:39:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:52,630 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1051 transitions. [2022-04-06 20:39:52,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1051 transitions. [2022-04-06 20:39:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:39:52,631 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:52,632 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:52,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 20:39:52,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-04-06 20:39:52,848 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1685814809, now seen corresponding path program 49 times [2022-04-06 20:39:52,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:52,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1624290685] [2022-04-06 20:39:52,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:52,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:52,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1685814809, now seen corresponding path program 50 times [2022-04-06 20:39:52,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:52,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238733555] [2022-04-06 20:39:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:52,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:53,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:39:53,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:53,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238733555] [2022-04-06 20:39:53,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238733555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:53,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727373389] [2022-04-06 20:39:53,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:53,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:53,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:53,044 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:53,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:39:53,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:53,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:53,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:39:53,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:39:53,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:39:54,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727373389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:54,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:54,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 24] total 48 [2022-04-06 20:39:54,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:54,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1624290685] [2022-04-06 20:39:54,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1624290685] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:54,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:54,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:39:54,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429204739] [2022-04-06 20:39:54,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:54,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:39:54,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:39:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:39:54,056 INFO L87 Difference]: Start difference. First operand 799 states and 1051 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:55,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:55,402 INFO L93 Difference]: Finished difference Result 949 states and 1235 transitions. [2022-04-06 20:39:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:39:55,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:39:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:55,405 INFO L225 Difference]: With dead ends: 949 [2022-04-06 20:39:55,405 INFO L226 Difference]: Without dead ends: 923 [2022-04-06 20:39:55,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=656, Invalid=3504, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:39:55,406 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 119 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:55,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 132 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:39:55,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-04-06 20:39:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 799. [2022-04-06 20:39:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 794 states have (on average 1.3173803526448362) internal successors, (1046), 794 states have internal predecessors, (1046), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1050 transitions. [2022-04-06 20:39:55,868 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1050 transitions. Word has length 43 [2022-04-06 20:39:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:55,868 INFO L478 AbstractCegarLoop]: Abstraction has 799 states and 1050 transitions. [2022-04-06 20:39:55,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1050 transitions. [2022-04-06 20:39:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:39:55,870 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:55,870 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:55,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:56,070 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,SelfDestructingSolverStorable56 [2022-04-06 20:39:56,071 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash 176066728, now seen corresponding path program 51 times [2022-04-06 20:39:56,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:56,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [754669266] [2022-04-06 20:39:56,072 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:56,072 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash 176066728, now seen corresponding path program 52 times [2022-04-06 20:39:56,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:56,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564681879] [2022-04-06 20:39:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:56,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:56,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:56,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:56,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564681879] [2022-04-06 20:39:56,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564681879] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:56,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185555893] [2022-04-06 20:39:56,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:56,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:56,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:56,449 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:56,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:39:56,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:56,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:56,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:39:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:56,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:39:57,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185555893] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:57,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:57,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:39:57,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:57,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [754669266] [2022-04-06 20:39:57,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [754669266] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:57,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:57,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:39:57,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943403517] [2022-04-06 20:39:57,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:57,508 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:39:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:39:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=2222, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:39:57,509 INFO L87 Difference]: Start difference. First operand 799 states and 1050 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:00,482 INFO L93 Difference]: Finished difference Result 1320 states and 2005 transitions. [2022-04-06 20:40:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:40:00,483 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:40:00,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:00,486 INFO L225 Difference]: With dead ends: 1320 [2022-04-06 20:40:00,486 INFO L226 Difference]: Without dead ends: 1274 [2022-04-06 20:40:00,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1354, Invalid=4966, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:40:00,487 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 260 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 5830 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 6013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 5830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:00,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 258 Invalid, 6013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 5830 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:40:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-04-06 20:40:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 831. [2022-04-06 20:40:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 826 states have (on average 1.320823244552058) internal successors, (1091), 826 states have internal predecessors, (1091), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1095 transitions. [2022-04-06 20:40:00,967 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1095 transitions. Word has length 43 [2022-04-06 20:40:00,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:00,967 INFO L478 AbstractCegarLoop]: Abstraction has 831 states and 1095 transitions. [2022-04-06 20:40:00,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:00,967 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1095 transitions. [2022-04-06 20:40:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:40:00,968 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:00,969 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:00,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:01,183 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,SelfDestructingSolverStorable57 [2022-04-06 20:40:01,183 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:01,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1208050166, now seen corresponding path program 39 times [2022-04-06 20:40:01,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:01,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [562677535] [2022-04-06 20:40:01,184 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:01,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:01,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1208050166, now seen corresponding path program 40 times [2022-04-06 20:40:01,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:01,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355205308] [2022-04-06 20:40:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:01,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:01,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:40:01,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:01,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355205308] [2022-04-06 20:40:01,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355205308] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:01,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995193721] [2022-04-06 20:40:01,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:01,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:01,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:01,428 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:01,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:40:01,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:01,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:01,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:40:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 20:40:01,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 20:40:01,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995193721] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:01,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:01,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 31 [2022-04-06 20:40:01,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [562677535] [2022-04-06 20:40:01,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [562677535] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:01,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:01,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:40:01,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994369315] [2022-04-06 20:40:01,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:01,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:40:01,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:40:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:40:01,817 INFO L87 Difference]: Start difference. First operand 831 states and 1095 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:03,814 INFO L93 Difference]: Finished difference Result 1000 states and 1362 transitions. [2022-04-06 20:40:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:40:03,815 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:40:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:03,817 INFO L225 Difference]: With dead ends: 1000 [2022-04-06 20:40:03,817 INFO L226 Difference]: Without dead ends: 888 [2022-04-06 20:40:03,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=377, Invalid=5323, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:40:03,818 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 97 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:03,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 129 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1874 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:40:03,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-04-06 20:40:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 832. [2022-04-06 20:40:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 827 states have (on average 1.32043530834341) internal successors, (1092), 827 states have internal predecessors, (1092), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1096 transitions. [2022-04-06 20:40:04,285 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1096 transitions. Word has length 44 [2022-04-06 20:40:04,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:04,285 INFO L478 AbstractCegarLoop]: Abstraction has 832 states and 1096 transitions. [2022-04-06 20:40:04,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1096 transitions. [2022-04-06 20:40:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:40:04,286 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:04,286 INFO L499 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:04,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 20:40:04,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 20:40:04,487 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:04,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1003438789, now seen corresponding path program 53 times [2022-04-06 20:40:04,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:04,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [14846945] [2022-04-06 20:40:04,488 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:04,488 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1003438789, now seen corresponding path program 54 times [2022-04-06 20:40:04,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:04,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576660335] [2022-04-06 20:40:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:04,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:04,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:04,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576660335] [2022-04-06 20:40:04,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576660335] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:04,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685727469] [2022-04-06 20:40:04,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:04,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:04,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:04,889 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:04,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:40:04,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:04,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:04,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:40:04,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-04-06 20:40:05,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-04-06 20:40:05,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685727469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:05,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:05,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 5, 5] total 34 [2022-04-06 20:40:05,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:05,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [14846945] [2022-04-06 20:40:05,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [14846945] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:05,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:05,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:40:05,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513488843] [2022-04-06 20:40:05,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:05,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:40:05,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:05,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:40:05,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1046, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:40:05,144 INFO L87 Difference]: Start difference. First operand 832 states and 1096 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:08,475 INFO L93 Difference]: Finished difference Result 1372 states and 2088 transitions. [2022-04-06 20:40:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:40:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:40:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:08,479 INFO L225 Difference]: With dead ends: 1372 [2022-04-06 20:40:08,479 INFO L226 Difference]: Without dead ends: 1326 [2022-04-06 20:40:08,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=3458, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:40:08,480 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 274 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6348 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 6541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 6348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:08,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 269 Invalid, 6541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 6348 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:40:08,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-04-06 20:40:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 864. [2022-04-06 20:40:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 859 states have (on average 1.3236321303841676) internal successors, (1137), 859 states have internal predecessors, (1137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1141 transitions. [2022-04-06 20:40:09,009 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1141 transitions. Word has length 44 [2022-04-06 20:40:09,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:09,009 INFO L478 AbstractCegarLoop]: Abstraction has 864 states and 1141 transitions. [2022-04-06 20:40:09,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1141 transitions. [2022-04-06 20:40:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:40:09,011 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:09,011 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:09,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 20:40:09,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:09,227 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:09,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:09,228 INFO L85 PathProgramCache]: Analyzing trace with hash -271824520, now seen corresponding path program 41 times [2022-04-06 20:40:09,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:09,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307876516] [2022-04-06 20:40:09,229 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:09,229 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:09,229 INFO L85 PathProgramCache]: Analyzing trace with hash -271824520, now seen corresponding path program 42 times [2022-04-06 20:40:09,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:09,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816181226] [2022-04-06 20:40:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:09,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:09,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:09,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:09,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816181226] [2022-04-06 20:40:09,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816181226] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:09,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512121941] [2022-04-06 20:40:09,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:09,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:09,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:09,448 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:09,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:40:09,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:40:09,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:09,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:40:09,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:09,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:09,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512121941] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:09,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:09,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2022-04-06 20:40:09,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:09,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307876516] [2022-04-06 20:40:09,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307876516] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:09,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:09,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:40:09,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253431671] [2022-04-06 20:40:09,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:09,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:40:09,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:09,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:40:09,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:40:09,884 INFO L87 Difference]: Start difference. First operand 864 states and 1141 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:12,250 INFO L93 Difference]: Finished difference Result 1814 states and 2344 transitions. [2022-04-06 20:40:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:40:12,251 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 45 [2022-04-06 20:40:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:12,253 INFO L225 Difference]: With dead ends: 1814 [2022-04-06 20:40:12,253 INFO L226 Difference]: Without dead ends: 1712 [2022-04-06 20:40:12,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:40:12,254 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 103 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:12,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 93 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-04-06 20:40:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 913. [2022-04-06 20:40:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 908 states have (on average 1.316079295154185) internal successors, (1195), 908 states have internal predecessors, (1195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1199 transitions. [2022-04-06 20:40:12,854 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1199 transitions. Word has length 45 [2022-04-06 20:40:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:12,855 INFO L478 AbstractCegarLoop]: Abstraction has 913 states and 1199 transitions. [2022-04-06 20:40:12,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1199 transitions. [2022-04-06 20:40:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:40:12,858 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:12,858 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:12,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 20:40:13,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:13,058 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:13,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:13,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1364837992, now seen corresponding path program 43 times [2022-04-06 20:40:13,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:13,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1514696315] [2022-04-06 20:40:13,059 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:13,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:13,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1364837992, now seen corresponding path program 44 times [2022-04-06 20:40:13,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:13,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447069603] [2022-04-06 20:40:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:13,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:13,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:13,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:13,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447069603] [2022-04-06 20:40:13,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447069603] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:13,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404709826] [2022-04-06 20:40:13,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:13,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:13,399 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:13,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:40:13,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:13,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:13,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:40:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:40:13,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:40:13,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404709826] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:13,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:13,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12, 12] total 34 [2022-04-06 20:40:13,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:13,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1514696315] [2022-04-06 20:40:13,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1514696315] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:13,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:13,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:40:13,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830980618] [2022-04-06 20:40:13,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:13,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:40:13,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:40:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:40:13,847 INFO L87 Difference]: Start difference. First operand 913 states and 1199 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:18,957 INFO L93 Difference]: Finished difference Result 1351 states and 1978 transitions. [2022-04-06 20:40:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-04-06 20:40:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:40:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:18,959 INFO L225 Difference]: With dead ends: 1351 [2022-04-06 20:40:18,959 INFO L226 Difference]: Without dead ends: 1235 [2022-04-06 20:40:18,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7040 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=869, Invalid=22693, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 20:40:18,961 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 178 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 5436 mSolverCounterSat, 549 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 5985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 5436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:18,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 146 Invalid, 5985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [549 Valid, 5436 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:40:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-04-06 20:40:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 973. [2022-04-06 20:40:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.3212809917355373) internal successors, (1279), 968 states have internal predecessors, (1279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1283 transitions. [2022-04-06 20:40:19,694 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1283 transitions. Word has length 45 [2022-04-06 20:40:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:19,694 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1283 transitions. [2022-04-06 20:40:19,694 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1283 transitions. [2022-04-06 20:40:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:40:19,696 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:19,696 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:19,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 20:40:19,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:19,897 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:19,898 INFO L85 PathProgramCache]: Analyzing trace with hash -503599577, now seen corresponding path program 55 times [2022-04-06 20:40:19,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1414354088] [2022-04-06 20:40:19,898 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:19,898 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash -503599577, now seen corresponding path program 56 times [2022-04-06 20:40:19,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:19,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249013578] [2022-04-06 20:40:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:19,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:20,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:40:20,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:20,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249013578] [2022-04-06 20:40:20,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249013578] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:20,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456339581] [2022-04-06 20:40:20,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:20,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:20,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:20,090 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:20,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:40:20,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:20,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:20,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:40:20,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:40:20,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:40:21,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456339581] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:21,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:21,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 52 [2022-04-06 20:40:21,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:21,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1414354088] [2022-04-06 20:40:21,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1414354088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:21,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:21,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:40:21,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780790086] [2022-04-06 20:40:21,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:21,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:40:21,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:40:21,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2250, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:40:21,104 INFO L87 Difference]: Start difference. First operand 973 states and 1283 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:22,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:22,708 INFO L93 Difference]: Finished difference Result 1151 states and 1497 transitions. [2022-04-06 20:40:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:40:22,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 45 [2022-04-06 20:40:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:22,710 INFO L225 Difference]: With dead ends: 1151 [2022-04-06 20:40:22,710 INFO L226 Difference]: Without dead ends: 1124 [2022-04-06 20:40:22,710 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=747, Invalid=4083, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:40:22,710 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 134 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:22,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 133 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-04-06 20:40:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 973. [2022-04-06 20:40:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.3202479338842976) internal successors, (1278), 968 states have internal predecessors, (1278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1282 transitions. [2022-04-06 20:40:23,374 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1282 transitions. Word has length 45 [2022-04-06 20:40:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:23,374 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1282 transitions. [2022-04-06 20:40:23,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1282 transitions. [2022-04-06 20:40:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:40:23,376 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:23,376 INFO L499 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:23,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:23,579 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,SelfDestructingSolverStorable62 [2022-04-06 20:40:23,580 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:23,580 INFO L85 PathProgramCache]: Analyzing trace with hash 882168904, now seen corresponding path program 57 times [2022-04-06 20:40:23,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:23,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [918623253] [2022-04-06 20:40:23,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:23,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash 882168904, now seen corresponding path program 58 times [2022-04-06 20:40:23,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:23,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524977179] [2022-04-06 20:40:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:23,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:24,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:24,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:24,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524977179] [2022-04-06 20:40:24,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524977179] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:24,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256806412] [2022-04-06 20:40:24,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:24,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:24,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:24,083 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:24,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:40:24,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:24,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:24,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:40:24,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:24,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:25,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256806412] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:25,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:25,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:40:25,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:25,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [918623253] [2022-04-06 20:40:25,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [918623253] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:25,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:25,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:40:25,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339598657] [2022-04-06 20:40:25,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:25,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:40:25,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:40:25,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=2562, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:40:25,287 INFO L87 Difference]: Start difference. First operand 973 states and 1282 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:28,858 INFO L93 Difference]: Finished difference Result 1569 states and 2375 transitions. [2022-04-06 20:40:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:40:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 20:40:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:28,861 INFO L225 Difference]: With dead ends: 1569 [2022-04-06 20:40:28,861 INFO L226 Difference]: Without dead ends: 1521 [2022-04-06 20:40:28,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1568, Invalid=5742, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:40:28,861 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 289 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 6631 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 6833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 6631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:28,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 275 Invalid, 6833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 6631 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:40:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-04-06 20:40:29,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1009. [2022-04-06 20:40:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1004 states have (on average 1.3237051792828685) internal successors, (1329), 1004 states have internal predecessors, (1329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1333 transitions. [2022-04-06 20:40:29,559 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1333 transitions. Word has length 45 [2022-04-06 20:40:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:29,559 INFO L478 AbstractCegarLoop]: Abstraction has 1009 states and 1333 transitions. [2022-04-06 20:40:29,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1333 transitions. [2022-04-06 20:40:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:40:29,561 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:29,561 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:29,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:29,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-04-06 20:40:29,779 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:29,780 INFO L85 PathProgramCache]: Analyzing trace with hash 643004597, now seen corresponding path program 59 times [2022-04-06 20:40:29,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:29,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232815317] [2022-04-06 20:40:29,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:29,780 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:29,781 INFO L85 PathProgramCache]: Analyzing trace with hash 643004597, now seen corresponding path program 60 times [2022-04-06 20:40:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:29,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472976735] [2022-04-06 20:40:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:29,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:29,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:40:29,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:29,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472976735] [2022-04-06 20:40:29,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472976735] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:29,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716332148] [2022-04-06 20:40:29,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:29,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:29,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:29,999 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:30,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:40:30,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:40:30,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:30,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:40:30,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:40:30,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:40:30,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716332148] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:30,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:30,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:40:30,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:30,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232815317] [2022-04-06 20:40:30,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232815317] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:30,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:30,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:40:30,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901226985] [2022-04-06 20:40:30,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:30,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:40:30,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:40:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:40:30,766 INFO L87 Difference]: Start difference. First operand 1009 states and 1333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:32,337 INFO L93 Difference]: Finished difference Result 1165 states and 1524 transitions. [2022-04-06 20:40:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:40:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 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 46 [2022-04-06 20:40:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:32,339 INFO L225 Difference]: With dead ends: 1165 [2022-04-06 20:40:32,339 INFO L226 Difference]: Without dead ends: 1136 [2022-04-06 20:40:32,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=2381, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:40:32,339 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:32,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 129 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-04-06 20:40:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1009. [2022-04-06 20:40:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1004 states have (on average 1.3227091633466135) internal successors, (1328), 1004 states have internal predecessors, (1328), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1332 transitions. [2022-04-06 20:40:33,031 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1332 transitions. Word has length 46 [2022-04-06 20:40:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:33,031 INFO L478 AbstractCegarLoop]: Abstraction has 1009 states and 1332 transitions. [2022-04-06 20:40:33,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1332 transitions. [2022-04-06 20:40:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:40:33,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:33,033 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:33,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:33,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:33,255 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1895178884, now seen corresponding path program 45 times [2022-04-06 20:40:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:33,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1746489624] [2022-04-06 20:40:33,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:33,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1895178884, now seen corresponding path program 46 times [2022-04-06 20:40:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:33,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720596835] [2022-04-06 20:40:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:33,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:33,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:33,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:33,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720596835] [2022-04-06 20:40:33,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720596835] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:33,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15031588] [2022-04-06 20:40:33,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:33,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:33,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:33,520 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:33,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:40:33,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:33,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:33,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:40:33,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-04-06 20:40:33,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-04-06 20:40:33,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15031588] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:33,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:33,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11, 11] total 32 [2022-04-06 20:40:33,909 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:33,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1746489624] [2022-04-06 20:40:33,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1746489624] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:33,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:33,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:40:33,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115273943] [2022-04-06 20:40:33,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:33,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:40:33,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:33,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:40:33,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=923, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:40:33,910 INFO L87 Difference]: Start difference. First operand 1009 states and 1332 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:36,290 INFO L93 Difference]: Finished difference Result 1256 states and 1683 transitions. [2022-04-06 20:40:36,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:40:36,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 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 46 [2022-04-06 20:40:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:36,292 INFO L225 Difference]: With dead ends: 1256 [2022-04-06 20:40:36,292 INFO L226 Difference]: Without dead ends: 1070 [2022-04-06 20:40:36,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=413, Invalid=6229, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:40:36,293 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 113 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:36,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 129 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:40:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-04-06 20:40:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1010. [2022-04-06 20:40:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1005 states have (on average 1.318407960199005) internal successors, (1325), 1005 states have internal predecessors, (1325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1329 transitions. [2022-04-06 20:40:36,999 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1329 transitions. Word has length 46 [2022-04-06 20:40:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:36,999 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1329 transitions. [2022-04-06 20:40:36,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1329 transitions. [2022-04-06 20:40:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:40:37,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:37,000 INFO L499 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:37,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 20:40:37,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:37,201 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1417769765, now seen corresponding path program 61 times [2022-04-06 20:40:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:37,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1590362272] [2022-04-06 20:40:37,202 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:37,202 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1417769765, now seen corresponding path program 62 times [2022-04-06 20:40:37,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643784851] [2022-04-06 20:40:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:37,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:37,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:37,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643784851] [2022-04-06 20:40:37,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643784851] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141733805] [2022-04-06 20:40:37,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:37,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:37,671 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:37,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:40:37,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:37,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:37,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:40:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:37,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:38,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141733805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:38,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:38,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:40:38,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:38,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1590362272] [2022-04-06 20:40:38,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1590362272] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:38,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:38,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:40:38,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636921904] [2022-04-06 20:40:38,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:38,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:40:38,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:40:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=2741, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:40:38,924 INFO L87 Difference]: Start difference. First operand 1010 states and 1329 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:42,759 INFO L93 Difference]: Finished difference Result 1626 states and 2461 transitions. [2022-04-06 20:40:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:40:42,763 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:40:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:42,766 INFO L225 Difference]: With dead ends: 1626 [2022-04-06 20:40:42,766 INFO L226 Difference]: Without dead ends: 1578 [2022-04-06 20:40:42,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1681, Invalid=6151, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:40:42,767 INFO L913 BasicCegarLoop]: 149 mSDtfsCounter, 302 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 7182 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 7393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 7182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:42,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 286 Invalid, 7393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 7182 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:40:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2022-04-06 20:40:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1046. [2022-04-06 20:40:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1041 states have (on average 1.3218059558117194) internal successors, (1376), 1041 states have internal predecessors, (1376), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1380 transitions. [2022-04-06 20:40:43,507 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1380 transitions. Word has length 46 [2022-04-06 20:40:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:43,507 INFO L478 AbstractCegarLoop]: Abstraction has 1046 states and 1380 transitions. [2022-04-06 20:40:43,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1380 transitions. [2022-04-06 20:40:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:43,508 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:43,508 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:43,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 20:40:43,709 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 20:40:43,709 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:43,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:43,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1284526650, now seen corresponding path program 9 times [2022-04-06 20:40:43,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:43,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [628128365] [2022-04-06 20:40:43,710 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:43,710 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:43,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1284526650, now seen corresponding path program 10 times [2022-04-06 20:40:43,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:43,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404345009] [2022-04-06 20:40:43,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:43,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:43,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:40:43,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:43,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404345009] [2022-04-06 20:40:43,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404345009] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:43,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202935172] [2022-04-06 20:40:43,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:43,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:43,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:43,837 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:43,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:40:43,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:43,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:43,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:40:43,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 20:40:43,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 20:40:44,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202935172] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:44,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:44,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 13 [2022-04-06 20:40:44,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:44,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [628128365] [2022-04-06 20:40:44,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [628128365] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:44,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:44,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:40:44,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831985403] [2022-04-06 20:40:44,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:44,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:40:44,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:44,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:40:44,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:40:44,047 INFO L87 Difference]: Start difference. First operand 1046 states and 1380 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:46,165 INFO L93 Difference]: Finished difference Result 1989 states and 2524 transitions. [2022-04-06 20:40:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:40:46,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 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 47 [2022-04-06 20:40:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:46,168 INFO L225 Difference]: With dead ends: 1989 [2022-04-06 20:40:46,168 INFO L226 Difference]: Without dead ends: 1724 [2022-04-06 20:40:46,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:40:46,168 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 50 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:46,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 86 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:40:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2022-04-06 20:40:46,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1016. [2022-04-06 20:40:46,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1011 states have (on average 1.3155291790306627) internal successors, (1330), 1011 states have internal predecessors, (1330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1334 transitions. [2022-04-06 20:40:46,866 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1334 transitions. Word has length 47 [2022-04-06 20:40:46,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:46,866 INFO L478 AbstractCegarLoop]: Abstraction has 1016 states and 1334 transitions. [2022-04-06 20:40:46,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1334 transitions. [2022-04-06 20:40:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:46,867 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:46,867 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:46,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:47,068 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,SelfDestructingSolverStorable67 [2022-04-06 20:40:47,068 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:47,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1666786040, now seen corresponding path program 47 times [2022-04-06 20:40:47,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:47,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [18404948] [2022-04-06 20:40:47,069 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:47,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:47,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1666786040, now seen corresponding path program 48 times [2022-04-06 20:40:47,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:47,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137400650] [2022-04-06 20:40:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:47,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:47,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:47,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137400650] [2022-04-06 20:40:47,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137400650] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:47,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545185643] [2022-04-06 20:40:47,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:47,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:47,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:47,364 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:47,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:40:47,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:40:47,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:40:47,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:47,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:40:48,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545185643] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:48,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:48,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 22] total 54 [2022-04-06 20:40:48,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:48,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [18404948] [2022-04-06 20:40:48,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [18404948] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:48,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:48,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:40:48,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614516591] [2022-04-06 20:40:48,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:48,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:40:48,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:48,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:40:48,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:40:48,546 INFO L87 Difference]: Start difference. First operand 1016 states and 1334 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:51,286 INFO L93 Difference]: Finished difference Result 1213 states and 1649 transitions. [2022-04-06 20:40:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:40:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:40:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:51,289 INFO L225 Difference]: With dead ends: 1213 [2022-04-06 20:40:51,289 INFO L226 Difference]: Without dead ends: 1083 [2022-04-06 20:40:51,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1098, Invalid=9822, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:40:51,303 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 100 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:51,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 154 Invalid, 2706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:40:51,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-04-06 20:40:52,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1017. [2022-04-06 20:40:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1012 states have (on average 1.315217391304348) internal successors, (1331), 1012 states have internal predecessors, (1331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1335 transitions. [2022-04-06 20:40:52,068 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1335 transitions. Word has length 47 [2022-04-06 20:40:52,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:52,068 INFO L478 AbstractCegarLoop]: Abstraction has 1017 states and 1335 transitions. [2022-04-06 20:40:52,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:52,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1335 transitions. [2022-04-06 20:40:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:52,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:52,069 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:52,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 20:40:52,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:52,271 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:52,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:52,272 INFO L85 PathProgramCache]: Analyzing trace with hash -110941415, now seen corresponding path program 63 times [2022-04-06 20:40:52,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:52,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [345573820] [2022-04-06 20:40:52,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:52,273 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:52,273 INFO L85 PathProgramCache]: Analyzing trace with hash -110941415, now seen corresponding path program 64 times [2022-04-06 20:40:52,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:52,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329384621] [2022-04-06 20:40:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:52,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:52,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:40:52,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:52,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329384621] [2022-04-06 20:40:52,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329384621] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:52,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430820786] [2022-04-06 20:40:52,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:52,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:52,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:52,487 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:52,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:40:52,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:52,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:52,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:40:52,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:40:52,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:40:53,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430820786] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:53,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:53,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:40:53,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:53,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [345573820] [2022-04-06 20:40:53,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [345573820] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:53,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:53,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:40:53,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581479167] [2022-04-06 20:40:53,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:53,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:40:53,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:53,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:40:53,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:40:53,063 INFO L87 Difference]: Start difference. First operand 1017 states and 1335 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:54,789 INFO L93 Difference]: Finished difference Result 1212 states and 1573 transitions. [2022-04-06 20:40:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:40:54,790 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:40:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:54,792 INFO L225 Difference]: With dead ends: 1212 [2022-04-06 20:40:54,792 INFO L226 Difference]: Without dead ends: 1184 [2022-04-06 20:40:54,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=606, Invalid=2364, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:40:54,793 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 135 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:54,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 141 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:40:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-04-06 20:40:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1017. [2022-04-06 20:40:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1012 states have (on average 1.3142292490118577) internal successors, (1330), 1012 states have internal predecessors, (1330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1334 transitions. [2022-04-06 20:40:55,644 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1334 transitions. Word has length 47 [2022-04-06 20:40:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:55,644 INFO L478 AbstractCegarLoop]: Abstraction has 1017 states and 1334 transitions. [2022-04-06 20:40:55,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1334 transitions. [2022-04-06 20:40:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:55,646 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:55,646 INFO L499 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:55,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 20:40:55,846 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,SelfDestructingSolverStorable69 [2022-04-06 20:40:55,846 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 841527272, now seen corresponding path program 65 times [2022-04-06 20:40:55,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:55,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166702366] [2022-04-06 20:40:55,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:55,847 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 841527272, now seen corresponding path program 66 times [2022-04-06 20:40:55,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:55,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686689581] [2022-04-06 20:40:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:55,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:56,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:40:56,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:56,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686689581] [2022-04-06 20:40:56,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686689581] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:56,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501220122] [2022-04-06 20:40:56,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:56,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:56,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:56,335 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:56,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:40:56,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:56,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:56,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:40:56,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2022-04-06 20:40:56,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2022-04-06 20:40:56,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501220122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:56,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 5, 5] total 37 [2022-04-06 20:40:56,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:56,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166702366] [2022-04-06 20:40:56,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166702366] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:56,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:56,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:40:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838722977] [2022-04-06 20:40:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:56,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:40:56,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:40:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:40:56,609 INFO L87 Difference]: Start difference. First operand 1017 states and 1334 transitions. Second operand has 32 states, 32 states have (on average 1.34375) internal successors, (43), 31 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:00,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:00,739 INFO L93 Difference]: Finished difference Result 1709 states and 2615 transitions. [2022-04-06 20:41:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:41:00,739 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 31 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:41:00,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:00,742 INFO L225 Difference]: With dead ends: 1709 [2022-04-06 20:41:00,742 INFO L226 Difference]: Without dead ends: 1657 [2022-04-06 20:41:00,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=4202, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:41:00,743 INFO L913 BasicCegarLoop]: 152 mSDtfsCounter, 298 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 7646 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 7858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 7646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:00,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 294 Invalid, 7858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 7646 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:41:00,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2022-04-06 20:41:01,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1052. [2022-04-06 20:41:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1047 states have (on average 1.3170964660936009) internal successors, (1379), 1047 states have internal predecessors, (1379), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1383 transitions. [2022-04-06 20:41:01,512 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1383 transitions. Word has length 47 [2022-04-06 20:41:01,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:01,512 INFO L478 AbstractCegarLoop]: Abstraction has 1052 states and 1383 transitions. [2022-04-06 20:41:01,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 31 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:01,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1383 transitions. [2022-04-06 20:41:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:41:01,513 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:01,513 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:01,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-04-06 20:41:01,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:01,714 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:01,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:01,715 INFO L85 PathProgramCache]: Analyzing trace with hash -418548988, now seen corresponding path program 49 times [2022-04-06 20:41:01,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:01,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665169804] [2022-04-06 20:41:01,715 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:01,715 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:01,715 INFO L85 PathProgramCache]: Analyzing trace with hash -418548988, now seen corresponding path program 50 times [2022-04-06 20:41:01,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:01,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504264036] [2022-04-06 20:41:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:01,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:02,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:02,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504264036] [2022-04-06 20:41:02,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504264036] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:02,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005329541] [2022-04-06 20:41:02,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:02,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:02,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:02,086 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:02,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:41:02,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:02,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 20:41:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:41:02,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:41:02,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005329541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:02,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:02,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 37 [2022-04-06 20:41:02,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:02,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665169804] [2022-04-06 20:41:02,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665169804] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:02,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:02,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:41:02,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449138812] [2022-04-06 20:41:02,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:02,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:41:02,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:41:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:41:02,550 INFO L87 Difference]: Start difference. First operand 1052 states and 1383 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:09,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:09,217 INFO L93 Difference]: Finished difference Result 1574 states and 2319 transitions. [2022-04-06 20:41:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-04-06 20:41:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:41:09,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:09,232 INFO L225 Difference]: With dead ends: 1574 [2022-04-06 20:41:09,232 INFO L226 Difference]: Without dead ends: 1440 [2022-04-06 20:41:09,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1032, Invalid=31188, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 20:41:09,234 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 202 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 7030 mSolverCounterSat, 639 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 7669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 639 IncrementalHoareTripleChecker+Valid, 7030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:09,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 168 Invalid, 7669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [639 Valid, 7030 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:41:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2022-04-06 20:41:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1119. [2022-04-06 20:41:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1114 states have (on average 1.322262118491921) internal successors, (1473), 1114 states have internal predecessors, (1473), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:10,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1477 transitions. [2022-04-06 20:41:10,168 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1477 transitions. Word has length 48 [2022-04-06 20:41:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:10,169 INFO L478 AbstractCegarLoop]: Abstraction has 1119 states and 1477 transitions. [2022-04-06 20:41:10,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1477 transitions. [2022-04-06 20:41:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:41:10,170 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:10,170 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:10,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 20:41:10,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:10,370 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:10,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:10,371 INFO L85 PathProgramCache]: Analyzing trace with hash -603598427, now seen corresponding path program 67 times [2022-04-06 20:41:10,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:10,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1515839414] [2022-04-06 20:41:10,371 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:10,371 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:10,371 INFO L85 PathProgramCache]: Analyzing trace with hash -603598427, now seen corresponding path program 68 times [2022-04-06 20:41:10,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:10,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872961848] [2022-04-06 20:41:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:10,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:10,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 20:41:10,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:10,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872961848] [2022-04-06 20:41:10,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872961848] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:10,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028957024] [2022-04-06 20:41:10,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:10,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:10,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:10,569 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:10,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:41:10,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:10,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:10,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:41:10,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:41:10,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:41:11,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028957024] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:11,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:11,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 26] total 52 [2022-04-06 20:41:11,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:11,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1515839414] [2022-04-06 20:41:11,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1515839414] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:11,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:11,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:41:11,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522592220] [2022-04-06 20:41:11,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:11,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:41:11,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:11,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:41:11,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2250, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:41:11,652 INFO L87 Difference]: Start difference. First operand 1119 states and 1477 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:13,616 INFO L93 Difference]: Finished difference Result 1291 states and 1691 transitions. [2022-04-06 20:41:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:41:13,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:41:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:13,618 INFO L225 Difference]: With dead ends: 1291 [2022-04-06 20:41:13,618 INFO L226 Difference]: Without dead ends: 1261 [2022-04-06 20:41:13,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=862, Invalid=4540, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:41:13,618 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 125 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:13,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 137 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:13,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-04-06 20:41:14,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1119. [2022-04-06 20:41:14,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1114 states have (on average 1.3213644524236985) internal successors, (1472), 1114 states have internal predecessors, (1472), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:14,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1476 transitions. [2022-04-06 20:41:14,508 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1476 transitions. Word has length 48 [2022-04-06 20:41:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:14,508 INFO L478 AbstractCegarLoop]: Abstraction has 1119 states and 1476 transitions. [2022-04-06 20:41:14,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1476 transitions. [2022-04-06 20:41:14,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:41:14,509 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:14,509 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:14,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-06 20:41:14,709 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,SelfDestructingSolverStorable72 [2022-04-06 20:41:14,710 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:14,710 INFO L85 PathProgramCache]: Analyzing trace with hash 502083702, now seen corresponding path program 51 times [2022-04-06 20:41:14,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:14,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [836020354] [2022-04-06 20:41:14,711 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:14,711 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:14,711 INFO L85 PathProgramCache]: Analyzing trace with hash 502083702, now seen corresponding path program 52 times [2022-04-06 20:41:14,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:14,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867291777] [2022-04-06 20:41:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:14,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:14,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:41:14,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867291777] [2022-04-06 20:41:14,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867291777] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568414877] [2022-04-06 20:41:14,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:14,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:14,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:14,992 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:14,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:41:15,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:15,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:15,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:41:15,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 32 proven. 64 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-04-06 20:41:15,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:15,381 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 32 proven. 64 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-04-06 20:41:15,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568414877] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:15,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:15,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11, 11] total 33 [2022-04-06 20:41:15,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:15,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [836020354] [2022-04-06 20:41:15,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [836020354] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:15,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:15,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:41:15,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896961665] [2022-04-06 20:41:15,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:15,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:41:15,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:41:15,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=985, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:41:15,382 INFO L87 Difference]: Start difference. First operand 1119 states and 1476 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:17,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:17,997 INFO L93 Difference]: Finished difference Result 1396 states and 1875 transitions. [2022-04-06 20:41:17,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:41:17,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:41:17,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:18,000 INFO L225 Difference]: With dead ends: 1396 [2022-04-06 20:41:18,000 INFO L226 Difference]: Without dead ends: 1190 [2022-04-06 20:41:18,001 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=419, Invalid=6553, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:41:18,001 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 120 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:18,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 127 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2050 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:41:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-04-06 20:41:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1120. [2022-04-06 20:41:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1115 states have (on average 1.317488789237668) internal successors, (1469), 1115 states have internal predecessors, (1469), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1473 transitions. [2022-04-06 20:41:18,916 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1473 transitions. Word has length 48 [2022-04-06 20:41:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:18,917 INFO L478 AbstractCegarLoop]: Abstraction has 1120 states and 1473 transitions. [2022-04-06 20:41:18,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1473 transitions. [2022-04-06 20:41:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:41:18,918 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:18,918 INFO L499 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:18,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 20:41:19,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:19,118 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:19,119 INFO L85 PathProgramCache]: Analyzing trace with hash 157879173, now seen corresponding path program 69 times [2022-04-06 20:41:19,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:19,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1212326408] [2022-04-06 20:41:19,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:19,120 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash 157879173, now seen corresponding path program 70 times [2022-04-06 20:41:19,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:19,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543293910] [2022-04-06 20:41:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:19,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:19,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:19,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:19,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543293910] [2022-04-06 20:41:19,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543293910] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:19,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619067103] [2022-04-06 20:41:19,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:19,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:19,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:19,604 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:19,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:41:19,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:19,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:19,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:41:19,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:19,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:21,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619067103] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:21,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:21,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:41:21,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:21,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1212326408] [2022-04-06 20:41:21,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1212326408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:21,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:21,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:41:21,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620213720] [2022-04-06 20:41:21,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:21,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:41:21,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:21,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:41:21,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=3117, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:41:21,015 INFO L87 Difference]: Start difference. First operand 1120 states and 1473 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 32 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:25,600 INFO L93 Difference]: Finished difference Result 1836 states and 2800 transitions. [2022-04-06 20:41:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:41:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 32 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 20:41:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:25,603 INFO L225 Difference]: With dead ends: 1836 [2022-04-06 20:41:25,603 INFO L226 Difference]: Without dead ends: 1784 [2022-04-06 20:41:25,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1919, Invalid=7011, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:41:25,604 INFO L913 BasicCegarLoop]: 158 mSDtfsCounter, 311 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 8523 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 8744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 8523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:25,604 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 310 Invalid, 8744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 8523 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 20:41:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2022-04-06 20:41:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1157. [2022-04-06 20:41:26,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1152 states have (on average 1.3203125) internal successors, (1521), 1152 states have internal predecessors, (1521), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1525 transitions. [2022-04-06 20:41:26,568 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1525 transitions. Word has length 48 [2022-04-06 20:41:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:26,568 INFO L478 AbstractCegarLoop]: Abstraction has 1157 states and 1525 transitions. [2022-04-06 20:41:26,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 32 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1525 transitions. [2022-04-06 20:41:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:41:26,570 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:26,570 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:26,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-04-06 20:41:26,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:26,770 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:26,771 INFO L85 PathProgramCache]: Analyzing trace with hash 955441689, now seen corresponding path program 53 times [2022-04-06 20:41:26,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:26,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [957067549] [2022-04-06 20:41:26,771 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:26,771 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:26,771 INFO L85 PathProgramCache]: Analyzing trace with hash 955441689, now seen corresponding path program 54 times [2022-04-06 20:41:26,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:26,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827082696] [2022-04-06 20:41:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:26,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:27,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:41:27,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:27,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827082696] [2022-04-06 20:41:27,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827082696] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:27,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640888190] [2022-04-06 20:41:27,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:27,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:27,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:27,033 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:27,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:41:27,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:41:27,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:27,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:41:27,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:41:27,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 20:41:27,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640888190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:27,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:27,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 27 [2022-04-06 20:41:27,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [957067549] [2022-04-06 20:41:27,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [957067549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:27,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:27,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:41:27,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145430763] [2022-04-06 20:41:27,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:27,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:41:27,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:27,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:41:27,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:41:27,553 INFO L87 Difference]: Start difference. First operand 1157 states and 1525 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:31,640 INFO L93 Difference]: Finished difference Result 2648 states and 3337 transitions. [2022-04-06 20:41:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:41:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 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 49 [2022-04-06 20:41:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:31,644 INFO L225 Difference]: With dead ends: 2648 [2022-04-06 20:41:31,644 INFO L226 Difference]: Without dead ends: 2520 [2022-04-06 20:41:31,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:41:31,645 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 158 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:31,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 79 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:41:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2022-04-06 20:41:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1213. [2022-04-06 20:41:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1208 states have (on average 1.3137417218543046) internal successors, (1587), 1208 states have internal predecessors, (1587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1591 transitions. [2022-04-06 20:41:32,784 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1591 transitions. Word has length 49 [2022-04-06 20:41:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:32,784 INFO L478 AbstractCegarLoop]: Abstraction has 1213 states and 1591 transitions. [2022-04-06 20:41:32,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1591 transitions. [2022-04-06 20:41:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:41:32,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:32,785 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:32,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:32,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:32,990 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:32,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1579253032, now seen corresponding path program 55 times [2022-04-06 20:41:32,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:32,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1733260404] [2022-04-06 20:41:32,991 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:32,991 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:32,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1579253032, now seen corresponding path program 56 times [2022-04-06 20:41:32,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:32,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287458545] [2022-04-06 20:41:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:32,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:33,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:41:33,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:33,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287458545] [2022-04-06 20:41:33,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287458545] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:33,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246277147] [2022-04-06 20:41:33,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:33,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:33,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:33,340 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:33,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:41:33,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:33,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:33,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:41:33,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 27 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 20:41:33,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 27 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 20:41:33,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246277147] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:33,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:33,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 12] total 35 [2022-04-06 20:41:33,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:33,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1733260404] [2022-04-06 20:41:33,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1733260404] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:33,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:33,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:41:33,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065005160] [2022-04-06 20:41:33,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:33,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:41:33,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:33,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:41:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:41:33,797 INFO L87 Difference]: Start difference. First operand 1213 states and 1591 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:37,053 INFO L93 Difference]: Finished difference Result 1421 states and 1923 transitions. [2022-04-06 20:41:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:41:37,053 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 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 49 [2022-04-06 20:41:37,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:37,055 INFO L225 Difference]: With dead ends: 1421 [2022-04-06 20:41:37,055 INFO L226 Difference]: Without dead ends: 1284 [2022-04-06 20:41:37,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=472, Invalid=7900, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:41:37,056 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 113 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3136 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 3136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:37,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 172 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 3136 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:41:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-04-06 20:41:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1214. [2022-04-06 20:41:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1209 states have (on average 1.3134822167080231) internal successors, (1588), 1209 states have internal predecessors, (1588), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1592 transitions. [2022-04-06 20:41:38,023 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1592 transitions. Word has length 49 [2022-04-06 20:41:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:38,023 INFO L478 AbstractCegarLoop]: Abstraction has 1214 states and 1592 transitions. [2022-04-06 20:41:38,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:38,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1592 transitions. [2022-04-06 20:41:38,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:41:38,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:38,024 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:38,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-06 20:41:38,225 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,SelfDestructingSolverStorable76 [2022-04-06 20:41:38,225 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:38,225 INFO L85 PathProgramCache]: Analyzing trace with hash 34547623, now seen corresponding path program 71 times [2022-04-06 20:41:38,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:38,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1907596156] [2022-04-06 20:41:38,226 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:38,226 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:38,226 INFO L85 PathProgramCache]: Analyzing trace with hash 34547623, now seen corresponding path program 72 times [2022-04-06 20:41:38,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:38,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997015998] [2022-04-06 20:41:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:38,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:38,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:41:38,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997015998] [2022-04-06 20:41:38,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997015998] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396576994] [2022-04-06 20:41:38,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:38,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:38,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:38,443 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:38,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:41:38,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:41:38,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:38,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:41:38,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-04-06 20:41:38,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-04-06 20:41:39,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396576994] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:39,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:39,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 29 [2022-04-06 20:41:39,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:39,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1907596156] [2022-04-06 20:41:39,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1907596156] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:39,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:39,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:41:39,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673329873] [2022-04-06 20:41:39,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:39,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:41:39,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:39,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:41:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:41:39,040 INFO L87 Difference]: Start difference. First operand 1214 states and 1592 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:41,321 INFO L93 Difference]: Finished difference Result 1441 states and 1864 transitions. [2022-04-06 20:41:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:41:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 49 [2022-04-06 20:41:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:41,323 INFO L225 Difference]: With dead ends: 1441 [2022-04-06 20:41:41,323 INFO L226 Difference]: Without dead ends: 1412 [2022-04-06 20:41:41,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=2149, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:41:41,323 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 150 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:41,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 162 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2279 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:41:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-04-06 20:41:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1214. [2022-04-06 20:41:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1209 states have (on average 1.3126550868486353) internal successors, (1587), 1209 states have internal predecessors, (1587), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:42,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1591 transitions. [2022-04-06 20:41:42,328 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1591 transitions. Word has length 49 [2022-04-06 20:41:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:42,328 INFO L478 AbstractCegarLoop]: Abstraction has 1214 states and 1591 transitions. [2022-04-06 20:41:42,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:42,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1591 transitions. [2022-04-06 20:41:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:41:42,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:42,329 INFO L499 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:42,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-04-06 20:41:42,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:42,530 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash 439624584, now seen corresponding path program 73 times [2022-04-06 20:41:42,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:42,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1009906984] [2022-04-06 20:41:42,531 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:42,531 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash 439624584, now seen corresponding path program 74 times [2022-04-06 20:41:42,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:42,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140967298] [2022-04-06 20:41:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:42,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:43,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:43,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:43,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140967298] [2022-04-06 20:41:43,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140967298] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:43,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33332357] [2022-04-06 20:41:43,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:43,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:43,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:43,094 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:43,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:41:43,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:43,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:43,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:41:43,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:43,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:41:44,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33332357] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:44,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:44,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:41:44,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:44,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1009906984] [2022-04-06 20:41:44,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1009906984] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:44,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:44,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:41:44,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262666629] [2022-04-06 20:41:44,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:44,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:41:44,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:44,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:41:44,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=3314, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:41:44,631 INFO L87 Difference]: Start difference. First operand 1214 states and 1591 transitions. Second operand has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 33 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:49,564 INFO L93 Difference]: Finished difference Result 1992 states and 3031 transitions. [2022-04-06 20:41:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:41:49,564 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 33 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:41:49,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:49,566 INFO L225 Difference]: With dead ends: 1992 [2022-04-06 20:41:49,566 INFO L226 Difference]: Without dead ends: 1938 [2022-04-06 20:41:49,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2044, Invalid=7462, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:41:49,567 INFO L913 BasicCegarLoop]: 164 mSDtfsCounter, 326 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 9147 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 9378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 9147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:49,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 321 Invalid, 9378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 9147 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 20:41:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2022-04-06 20:41:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1253. [2022-04-06 20:41:50,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1248 states have (on average 1.3157051282051282) internal successors, (1642), 1248 states have internal predecessors, (1642), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1646 transitions. [2022-04-06 20:41:50,571 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1646 transitions. Word has length 49 [2022-04-06 20:41:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:50,571 INFO L478 AbstractCegarLoop]: Abstraction has 1253 states and 1646 transitions. [2022-04-06 20:41:50,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 33 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1646 transitions. [2022-04-06 20:41:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:41:50,573 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:50,573 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:50,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 20:41:50,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:50,773 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:50,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:50,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1676182346, now seen corresponding path program 57 times [2022-04-06 20:41:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:50,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1675427232] [2022-04-06 20:41:50,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:50,774 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1676182346, now seen corresponding path program 58 times [2022-04-06 20:41:50,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:50,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240405848] [2022-04-06 20:41:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:50,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:51,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:41:51,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:51,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240405848] [2022-04-06 20:41:51,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240405848] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376249585] [2022-04-06 20:41:51,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:51,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:51,114 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:51,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:41:51,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:51,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:51,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:41:51,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 20 proven. 100 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-04-06 20:41:51,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 20 proven. 100 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-04-06 20:41:51,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376249585] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:51,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:51,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 37 [2022-04-06 20:41:51,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:51,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1675427232] [2022-04-06 20:41:51,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1675427232] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:51,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:51,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:41:51,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528057696] [2022-04-06 20:41:51,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:51,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:41:51,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:41:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:41:51,612 INFO L87 Difference]: Start difference. First operand 1253 states and 1646 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:55,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:55,115 INFO L93 Difference]: Finished difference Result 1464 states and 1983 transitions. [2022-04-06 20:41:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:41:55,115 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:41:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:55,117 INFO L225 Difference]: With dead ends: 1464 [2022-04-06 20:41:55,117 INFO L226 Difference]: Without dead ends: 1324 [2022-04-06 20:41:55,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=525, Invalid=9375, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:41:55,118 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 107 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3410 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 3595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 3410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:55,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 177 Invalid, 3595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 3410 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:41:55,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-04-06 20:41:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1254. [2022-04-06 20:41:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1249 states have (on average 1.3154523618895115) internal successors, (1643), 1249 states have internal predecessors, (1643), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1647 transitions. [2022-04-06 20:41:56,172 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1647 transitions. Word has length 50 [2022-04-06 20:41:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:56,172 INFO L478 AbstractCegarLoop]: Abstraction has 1254 states and 1647 transitions. [2022-04-06 20:41:56,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1647 transitions. [2022-04-06 20:41:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:41:56,173 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:56,174 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:56,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 20:41:56,374 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,SelfDestructingSolverStorable79 [2022-04-06 20:41:56,374 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:56,374 INFO L85 PathProgramCache]: Analyzing trace with hash 234234741, now seen corresponding path program 75 times [2022-04-06 20:41:56,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:56,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1184226725] [2022-04-06 20:41:56,375 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:56,375 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash 234234741, now seen corresponding path program 76 times [2022-04-06 20:41:56,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:56,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452928617] [2022-04-06 20:41:56,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:56,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:56,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:41:56,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452928617] [2022-04-06 20:41:56,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452928617] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624702196] [2022-04-06 20:41:56,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:56,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:56,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:56,616 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:56,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:41:56,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:56,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:56,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:41:56,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:41:56,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:41:57,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624702196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:57,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:57,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 20:41:57,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1184226725] [2022-04-06 20:41:57,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1184226725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:57,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:57,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:41:57,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127260464] [2022-04-06 20:41:57,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:57,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:41:57,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:57,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:41:57,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:41:57,218 INFO L87 Difference]: Start difference. First operand 1254 states and 1647 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:59,377 INFO L93 Difference]: Finished difference Result 1456 states and 1893 transitions. [2022-04-06 20:41:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:41:59,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 50 [2022-04-06 20:41:59,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:59,383 INFO L225 Difference]: With dead ends: 1456 [2022-04-06 20:41:59,383 INFO L226 Difference]: Without dead ends: 1425 [2022-04-06 20:41:59,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=721, Invalid=2939, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:41:59,383 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 135 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:59,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 150 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:41:59,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2022-04-06 20:42:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1254. [2022-04-06 20:42:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1249 states have (on average 1.3146517213771016) internal successors, (1642), 1249 states have internal predecessors, (1642), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1646 transitions. [2022-04-06 20:42:00,370 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1646 transitions. Word has length 50 [2022-04-06 20:42:00,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:00,370 INFO L478 AbstractCegarLoop]: Abstraction has 1254 states and 1646 transitions. [2022-04-06 20:42:00,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1646 transitions. [2022-04-06 20:42:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:42:00,372 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:00,372 INFO L499 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:00,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 20:42:00,572 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:00,572 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:00,573 INFO L85 PathProgramCache]: Analyzing trace with hash 583797733, now seen corresponding path program 77 times [2022-04-06 20:42:00,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:00,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1466602702] [2022-04-06 20:42:00,574 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:00,574 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:00,574 INFO L85 PathProgramCache]: Analyzing trace with hash 583797733, now seen corresponding path program 78 times [2022-04-06 20:42:00,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:00,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826682534] [2022-04-06 20:42:00,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:00,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:01,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 0 proven. 436 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:01,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:01,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826682534] [2022-04-06 20:42:01,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826682534] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:01,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777550134] [2022-04-06 20:42:01,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:01,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:01,143 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:01,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:42:01,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:42:01,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:01,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:42:01,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-04-06 20:42:01,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-04-06 20:42:01,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777550134] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:01,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:01,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 4, 4] total 37 [2022-04-06 20:42:01,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:01,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1466602702] [2022-04-06 20:42:01,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1466602702] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:01,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:01,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:42:01,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645576465] [2022-04-06 20:42:01,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:01,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:42:01,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:01,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:42:01,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:42:01,340 INFO L87 Difference]: Start difference. First operand 1254 states and 1646 transitions. Second operand has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:06,454 INFO L93 Difference]: Finished difference Result 2055 states and 3131 transitions. [2022-04-06 20:42:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:42:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:42:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:06,456 INFO L225 Difference]: With dead ends: 2055 [2022-04-06 20:42:06,457 INFO L226 Difference]: Without dead ends: 2001 [2022-04-06 20:42:06,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=4611, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:42:06,457 INFO L913 BasicCegarLoop]: 170 mSDtfsCounter, 340 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 9485 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 9725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 9485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:06,457 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 327 Invalid, 9725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 9485 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 20:42:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-04-06 20:42:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1293. [2022-04-06 20:42:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1288 states have (on average 1.3175465838509317) internal successors, (1697), 1288 states have internal predecessors, (1697), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1701 transitions. [2022-04-06 20:42:07,589 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1701 transitions. Word has length 50 [2022-04-06 20:42:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:07,589 INFO L478 AbstractCegarLoop]: Abstraction has 1293 states and 1701 transitions. [2022-04-06 20:42:07,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1701 transitions. [2022-04-06 20:42:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:07,590 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:07,591 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:07,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:07,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:07,791 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:07,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:07,791 INFO L85 PathProgramCache]: Analyzing trace with hash -386023784, now seen corresponding path program 59 times [2022-04-06 20:42:07,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:07,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78633123] [2022-04-06 20:42:07,792 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:07,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:07,792 INFO L85 PathProgramCache]: Analyzing trace with hash -386023784, now seen corresponding path program 60 times [2022-04-06 20:42:07,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:07,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842886784] [2022-04-06 20:42:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:07,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:08,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:08,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:08,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842886784] [2022-04-06 20:42:08,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842886784] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:08,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295190836] [2022-04-06 20:42:08,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:08,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:08,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:08,182 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:08,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:42:08,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:42:08,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:08,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:42:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:08,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:09,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295190836] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:09,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:09,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 52 [2022-04-06 20:42:09,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:09,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78633123] [2022-04-06 20:42:09,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78633123] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:09,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:09,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:42:09,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228216280] [2022-04-06 20:42:09,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:09,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:42:09,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:09,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:42:09,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:42:09,343 INFO L87 Difference]: Start difference. First operand 1293 states and 1701 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:17,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:17,594 INFO L93 Difference]: Finished difference Result 1897 states and 2792 transitions. [2022-04-06 20:42:17,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-04-06 20:42:17,595 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:42:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:17,597 INFO L225 Difference]: With dead ends: 1897 [2022-04-06 20:42:17,597 INFO L226 Difference]: Without dead ends: 1753 [2022-04-06 20:42:17,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14047 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5211, Invalid=42969, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 20:42:17,599 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 227 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 10088 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 10863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 10088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:17,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 196 Invalid, 10863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 10088 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:42:17,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2022-04-06 20:42:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1367. [2022-04-06 20:42:18,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1362 states have (on average 1.3223201174743024) internal successors, (1801), 1362 states have internal predecessors, (1801), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1805 transitions. [2022-04-06 20:42:18,895 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1805 transitions. Word has length 51 [2022-04-06 20:42:18,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:18,895 INFO L478 AbstractCegarLoop]: Abstraction has 1367 states and 1805 transitions. [2022-04-06 20:42:18,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:18,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1805 transitions. [2022-04-06 20:42:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:18,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:18,896 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:18,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-06 20:42:19,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:19,097 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:19,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1026925128, now seen corresponding path program 61 times [2022-04-06 20:42:19,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:19,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2062303817] [2022-04-06 20:42:19,098 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:19,098 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1026925128, now seen corresponding path program 62 times [2022-04-06 20:42:19,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:19,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829856362] [2022-04-06 20:42:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:19,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:19,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:42:19,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:19,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829856362] [2022-04-06 20:42:19,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829856362] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358110835] [2022-04-06 20:42:19,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:19,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:19,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:19,417 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:19,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:42:19,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:19,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:19,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:42:19,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 20:42:19,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 20:42:19,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358110835] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:19,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:19,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 12] total 36 [2022-04-06 20:42:19,864 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2062303817] [2022-04-06 20:42:19,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2062303817] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:19,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:19,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:42:19,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766876482] [2022-04-06 20:42:19,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:19,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:42:19,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:19,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:42:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1182, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:42:19,865 INFO L87 Difference]: Start difference. First operand 1367 states and 1805 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:23,679 INFO L93 Difference]: Finished difference Result 1683 states and 2251 transitions. [2022-04-06 20:42:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:42:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:42:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:23,681 INFO L225 Difference]: With dead ends: 1683 [2022-04-06 20:42:23,681 INFO L226 Difference]: Without dead ends: 1442 [2022-04-06 20:42:23,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=508, Invalid=8998, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:42:23,682 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 130 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3122 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 3320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 3122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:23,682 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 162 Invalid, 3320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 3122 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:42:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2022-04-06 20:42:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1368. [2022-04-06 20:42:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1363 states have (on average 1.318415260454879) internal successors, (1797), 1363 states have internal predecessors, (1797), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1801 transitions. [2022-04-06 20:42:25,052 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1801 transitions. Word has length 51 [2022-04-06 20:42:25,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:25,053 INFO L478 AbstractCegarLoop]: Abstraction has 1368 states and 1801 transitions. [2022-04-06 20:42:25,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:25,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1801 transitions. [2022-04-06 20:42:25,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:25,054 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:25,054 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:25,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:25,254 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 20:42:25,254 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:25,255 INFO L85 PathProgramCache]: Analyzing trace with hash 142395417, now seen corresponding path program 79 times [2022-04-06 20:42:25,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:25,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [190197776] [2022-04-06 20:42:25,256 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:25,256 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash 142395417, now seen corresponding path program 80 times [2022-04-06 20:42:25,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:25,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238055973] [2022-04-06 20:42:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:25,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:25,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 20:42:25,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:25,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238055973] [2022-04-06 20:42:25,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238055973] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:25,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104310752] [2022-04-06 20:42:25,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:25,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:25,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:25,491 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:25,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:42:25,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:25,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:25,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:42:25,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:42:25,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:42:26,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104310752] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:26,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:26,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 32, 32] total 64 [2022-04-06 20:42:26,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:26,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [190197776] [2022-04-06 20:42:26,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [190197776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:26,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:26,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:42:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759959922] [2022-04-06 20:42:26,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:26,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:42:26,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:26,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:42:26,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:42:26,957 INFO L87 Difference]: Start difference. First operand 1368 states and 1801 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:29,640 INFO L93 Difference]: Finished difference Result 1606 states and 2086 transitions. [2022-04-06 20:42:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:42:29,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:42:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:29,642 INFO L225 Difference]: With dead ends: 1606 [2022-04-06 20:42:29,642 INFO L226 Difference]: Without dead ends: 1576 [2022-04-06 20:42:29,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1056, Invalid=6084, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:42:29,643 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 166 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:29,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 163 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2323 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:42:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-04-06 20:42:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1368. [2022-04-06 20:42:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1363 states have (on average 1.317681584739545) internal successors, (1796), 1363 states have internal predecessors, (1796), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1800 transitions. [2022-04-06 20:42:30,987 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1800 transitions. Word has length 51 [2022-04-06 20:42:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:30,987 INFO L478 AbstractCegarLoop]: Abstraction has 1368 states and 1800 transitions. [2022-04-06 20:42:30,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1800 transitions. [2022-04-06 20:42:30,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:42:30,989 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:30,989 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:31,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 20:42:31,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:31,190 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:31,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:31,190 INFO L85 PathProgramCache]: Analyzing trace with hash 758198056, now seen corresponding path program 81 times [2022-04-06 20:42:31,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:31,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1229466063] [2022-04-06 20:42:31,191 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:31,191 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:31,191 INFO L85 PathProgramCache]: Analyzing trace with hash 758198056, now seen corresponding path program 82 times [2022-04-06 20:42:31,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:31,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414168317] [2022-04-06 20:42:31,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:31,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:31,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:31,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:31,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414168317] [2022-04-06 20:42:31,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414168317] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:31,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319548901] [2022-04-06 20:42:31,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:31,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:31,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:31,781 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:31,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:42:31,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:31,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:31,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:42:31,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:32,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:33,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319548901] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:33,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:33,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:42:33,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:33,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1229466063] [2022-04-06 20:42:33,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1229466063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:33,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:33,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:42:33,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692945078] [2022-04-06 20:42:33,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:33,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:42:33,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:33,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:42:33,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1104, Invalid=3726, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:42:33,478 INFO L87 Difference]: Start difference. First operand 1368 states and 1800 transitions. Second operand has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:39,186 INFO L93 Difference]: Finished difference Result 2194 states and 3333 transitions. [2022-04-06 20:42:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:42:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 20:42:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:39,190 INFO L225 Difference]: With dead ends: 2194 [2022-04-06 20:42:39,190 INFO L226 Difference]: Without dead ends: 2140 [2022-04-06 20:42:39,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2306, Invalid=8406, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:42:39,193 INFO L913 BasicCegarLoop]: 176 mSDtfsCounter, 354 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 10142 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 10391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 10142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:39,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 338 Invalid, 10391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 10142 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 20:42:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-04-06 20:42:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1409. [2022-04-06 20:42:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1404 states have (on average 1.3205128205128205) internal successors, (1854), 1404 states have internal predecessors, (1854), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1858 transitions. [2022-04-06 20:42:40,452 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1858 transitions. Word has length 51 [2022-04-06 20:42:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:40,452 INFO L478 AbstractCegarLoop]: Abstraction has 1409 states and 1858 transitions. [2022-04-06 20:42:40,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1858 transitions. [2022-04-06 20:42:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:40,454 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:40,454 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:40,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:40,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:40,654 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:40,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1040841212, now seen corresponding path program 63 times [2022-04-06 20:42:40,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:40,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1937097845] [2022-04-06 20:42:40,655 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:40,656 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1040841212, now seen corresponding path program 64 times [2022-04-06 20:42:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:40,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271460781] [2022-04-06 20:42:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:40,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:41,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:42:41,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271460781] [2022-04-06 20:42:41,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271460781] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370867289] [2022-04-06 20:42:41,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:41,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:41,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:41,013 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:41,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:42:41,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:41,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:41,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:42:41,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 30 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-04-06 20:42:41,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 30 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-04-06 20:42:41,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370867289] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:41,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:41,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13, 13] total 38 [2022-04-06 20:42:41,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:41,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1937097845] [2022-04-06 20:42:41,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1937097845] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:41,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:41,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:42:41,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818378440] [2022-04-06 20:42:41,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:41,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:42:41,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:42:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1323, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:42:41,518 INFO L87 Difference]: Start difference. First operand 1409 states and 1858 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:45,334 INFO L93 Difference]: Finished difference Result 1631 states and 2212 transitions. [2022-04-06 20:42:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:42:45,334 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 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 52 [2022-04-06 20:42:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:45,336 INFO L225 Difference]: With dead ends: 1631 [2022-04-06 20:42:45,336 INFO L226 Difference]: Without dead ends: 1484 [2022-04-06 20:42:45,337 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2302 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=569, Invalid=10773, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:42:45,337 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 130 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:45,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 142 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:42:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-04-06 20:42:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 1410. [2022-04-06 20:42:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1405 states have (on average 1.3202846975088969) internal successors, (1855), 1405 states have internal predecessors, (1855), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:46,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1859 transitions. [2022-04-06 20:42:46,646 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1859 transitions. Word has length 52 [2022-04-06 20:42:46,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:46,646 INFO L478 AbstractCegarLoop]: Abstraction has 1410 states and 1859 transitions. [2022-04-06 20:42:46,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1859 transitions. [2022-04-06 20:42:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:46,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:46,648 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:46,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:46,848 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,SelfDestructingSolverStorable86 [2022-04-06 20:42:46,848 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:46,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1404528741, now seen corresponding path program 83 times [2022-04-06 20:42:46,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:46,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1631296215] [2022-04-06 20:42:46,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:46,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:46,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1404528741, now seen corresponding path program 84 times [2022-04-06 20:42:46,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:46,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121069408] [2022-04-06 20:42:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:46,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:47,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-06 20:42:47,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:47,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121069408] [2022-04-06 20:42:47,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121069408] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:47,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950154167] [2022-04-06 20:42:47,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:47,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:47,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:47,124 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:47,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:42:47,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:42:47,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:47,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:42:47,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-06 20:42:47,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-06 20:42:48,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950154167] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:48,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:48,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:42:48,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1631296215] [2022-04-06 20:42:48,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1631296215] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:48,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:48,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:42:48,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657680027] [2022-04-06 20:42:48,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:48,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:42:48,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:48,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:42:48,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:42:48,397 INFO L87 Difference]: Start difference. First operand 1410 states and 1859 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:50,902 INFO L93 Difference]: Finished difference Result 1622 states and 2117 transitions. [2022-04-06 20:42:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:42:50,902 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:42:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:50,904 INFO L225 Difference]: With dead ends: 1622 [2022-04-06 20:42:50,904 INFO L226 Difference]: Without dead ends: 1590 [2022-04-06 20:42:50,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=793, Invalid=3239, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:42:50,905 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 151 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2058 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:50,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 151 Invalid, 2172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2058 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:42:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2022-04-06 20:42:52,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1410. [2022-04-06 20:42:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1405 states have (on average 1.3195729537366547) internal successors, (1854), 1405 states have internal predecessors, (1854), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1858 transitions. [2022-04-06 20:42:52,298 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1858 transitions. Word has length 52 [2022-04-06 20:42:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:52,298 INFO L478 AbstractCegarLoop]: Abstraction has 1410 states and 1858 transitions. [2022-04-06 20:42:52,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1858 transitions. [2022-04-06 20:42:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:42:52,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:52,299 INFO L499 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:52,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:52,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:52,500 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1869640773, now seen corresponding path program 85 times [2022-04-06 20:42:52,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:52,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390897237] [2022-04-06 20:42:52,501 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:52,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:52,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1869640773, now seen corresponding path program 86 times [2022-04-06 20:42:52,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:52,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470735261] [2022-04-06 20:42:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:52,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:53,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:53,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:53,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470735261] [2022-04-06 20:42:53,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470735261] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934858252] [2022-04-06 20:42:53,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:53,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:53,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:53,098 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:53,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:42:53,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:53,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:53,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:42:53,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:53,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:42:54,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934858252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:54,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:54,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:42:54,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:54,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390897237] [2022-04-06 20:42:54,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390897237] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:54,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:54,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:42:54,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309817009] [2022-04-06 20:42:54,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:54,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:42:54,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:42:54,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1171, Invalid=3941, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:42:54,870 INFO L87 Difference]: Start difference. First operand 1410 states and 1858 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 36 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:00,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:00,691 INFO L93 Difference]: Finished difference Result 2259 states and 3436 transitions. [2022-04-06 20:43:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:43:00,692 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 36 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:43:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:00,694 INFO L225 Difference]: With dead ends: 2259 [2022-04-06 20:43:00,694 INFO L226 Difference]: Without dead ends: 2205 [2022-04-06 20:43:00,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2443, Invalid=8899, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:43:00,695 INFO L913 BasicCegarLoop]: 182 mSDtfsCounter, 368 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 10821 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 11079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 10821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:00,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 349 Invalid, 11079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 10821 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:43:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2022-04-06 20:43:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1451. [2022-04-06 20:43:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1446 states have (on average 1.322268326417704) internal successors, (1912), 1446 states have internal predecessors, (1912), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1916 transitions. [2022-04-06 20:43:01,995 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1916 transitions. Word has length 52 [2022-04-06 20:43:01,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:01,995 INFO L478 AbstractCegarLoop]: Abstraction has 1451 states and 1916 transitions. [2022-04-06 20:43:01,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 36 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:01,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1916 transitions. [2022-04-06 20:43:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:01,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:01,997 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:02,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:02,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:02,199 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:02,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:02,200 INFO L85 PathProgramCache]: Analyzing trace with hash -43081415, now seen corresponding path program 11 times [2022-04-06 20:43:02,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:02,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [162030677] [2022-04-06 20:43:02,200 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:02,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:02,200 INFO L85 PathProgramCache]: Analyzing trace with hash -43081415, now seen corresponding path program 12 times [2022-04-06 20:43:02,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:02,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458485744] [2022-04-06 20:43:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:02,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:02,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 20:43:02,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:02,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458485744] [2022-04-06 20:43:02,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458485744] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:02,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200488309] [2022-04-06 20:43:02,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:02,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:02,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:02,369 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:02,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:43:02,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:43:02,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:02,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:43:02,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:43:02,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:43:02,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200488309] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:02,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:02,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 14 [2022-04-06 20:43:02,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:02,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [162030677] [2022-04-06 20:43:02,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [162030677] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:02,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:02,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:43:02,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269212192] [2022-04-06 20:43:02,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:02,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:43:02,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:43:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:43:02,705 INFO L87 Difference]: Start difference. First operand 1451 states and 1916 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:06,866 INFO L93 Difference]: Finished difference Result 3013 states and 3754 transitions. [2022-04-06 20:43:06,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:43:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:43:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:06,869 INFO L225 Difference]: With dead ends: 3013 [2022-04-06 20:43:06,869 INFO L226 Difference]: Without dead ends: 2664 [2022-04-06 20:43:06,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:43:06,870 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 53 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:06,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 97 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:43:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-04-06 20:43:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 1414. [2022-04-06 20:43:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1409 states have (on average 1.3165365507452094) internal successors, (1855), 1409 states have internal predecessors, (1855), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1859 transitions. [2022-04-06 20:43:08,192 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1859 transitions. Word has length 53 [2022-04-06 20:43:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:08,192 INFO L478 AbstractCegarLoop]: Abstraction has 1414 states and 1859 transitions. [2022-04-06 20:43:08,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1859 transitions. [2022-04-06 20:43:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:08,193 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:08,194 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:08,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 20:43:08,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 20:43:08,394 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash 739717144, now seen corresponding path program 65 times [2022-04-06 20:43:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:08,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1465569779] [2022-04-06 20:43:08,395 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:08,395 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:08,395 INFO L85 PathProgramCache]: Analyzing trace with hash 739717144, now seen corresponding path program 66 times [2022-04-06 20:43:08,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:08,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768269814] [2022-04-06 20:43:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:08,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:08,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:43:08,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:08,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768269814] [2022-04-06 20:43:08,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768269814] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:08,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986545262] [2022-04-06 20:43:08,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:08,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:08,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:08,723 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:08,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:43:08,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:43:08,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:43:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:43:09,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-04-06 20:43:09,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986545262] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:09,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:09,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 30 [2022-04-06 20:43:09,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:09,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1465569779] [2022-04-06 20:43:09,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1465569779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:09,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:09,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:43:09,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111192696] [2022-04-06 20:43:09,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:09,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:43:09,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:43:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:43:09,252 INFO L87 Difference]: Start difference. First operand 1414 states and 1859 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:14,875 INFO L93 Difference]: Finished difference Result 3291 states and 4134 transitions. [2022-04-06 20:43:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:43:14,877 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 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 53 [2022-04-06 20:43:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:14,880 INFO L225 Difference]: With dead ends: 3291 [2022-04-06 20:43:14,880 INFO L226 Difference]: Without dead ends: 3134 [2022-04-06 20:43:14,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=491, Invalid=1765, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:43:14,881 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 147 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:14,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 100 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:43:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2022-04-06 20:43:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 1478. [2022-04-06 20:43:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1473 states have (on average 1.3109300746775288) internal successors, (1931), 1473 states have internal predecessors, (1931), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 1935 transitions. [2022-04-06 20:43:16,257 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 1935 transitions. Word has length 53 [2022-04-06 20:43:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:16,258 INFO L478 AbstractCegarLoop]: Abstraction has 1478 states and 1935 transitions. [2022-04-06 20:43:16,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:16,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 1935 transitions. [2022-04-06 20:43:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:16,260 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:16,260 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:16,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:16,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:16,464 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:16,465 INFO L85 PathProgramCache]: Analyzing trace with hash -717088312, now seen corresponding path program 67 times [2022-04-06 20:43:16,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:16,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [743336234] [2022-04-06 20:43:16,466 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:16,466 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:16,466 INFO L85 PathProgramCache]: Analyzing trace with hash -717088312, now seen corresponding path program 68 times [2022-04-06 20:43:16,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:16,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140413577] [2022-04-06 20:43:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:16,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:16,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:43:16,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140413577] [2022-04-06 20:43:16,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140413577] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064301745] [2022-04-06 20:43:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:16,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:16,856 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:16,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:43:16,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:16,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:43:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 22 proven. 121 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-04-06 20:43:17,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 22 proven. 121 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-04-06 20:43:17,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064301745] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:17,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:17,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 14, 14] total 40 [2022-04-06 20:43:17,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:17,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [743336234] [2022-04-06 20:43:17,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [743336234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:17,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:17,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:43:17,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602255161] [2022-04-06 20:43:17,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:17,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:43:17,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:43:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1472, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:43:17,373 INFO L87 Difference]: Start difference. First operand 1478 states and 1935 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:21,467 INFO L93 Difference]: Finished difference Result 1719 states and 2324 transitions. [2022-04-06 20:43:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:43:21,467 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:43:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:21,469 INFO L225 Difference]: With dead ends: 1719 [2022-04-06 20:43:21,469 INFO L226 Difference]: Without dead ends: 1560 [2022-04-06 20:43:21,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=584, Invalid=11406, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:43:21,470 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 111 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3516 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 3516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:21,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 167 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 3516 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:43:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-04-06 20:43:22,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1479. [2022-04-06 20:43:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1474 states have (on average 1.310719131614654) internal successors, (1932), 1474 states have internal predecessors, (1932), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 1936 transitions. [2022-04-06 20:43:22,824 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 1936 transitions. Word has length 53 [2022-04-06 20:43:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:22,824 INFO L478 AbstractCegarLoop]: Abstraction has 1479 states and 1936 transitions. [2022-04-06 20:43:22,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 1936 transitions. [2022-04-06 20:43:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:22,825 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:22,825 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:22,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 20:43:23,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:23,026 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:23,026 INFO L85 PathProgramCache]: Analyzing trace with hash -888704729, now seen corresponding path program 87 times [2022-04-06 20:43:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:23,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1675489989] [2022-04-06 20:43:23,027 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:23,027 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:23,027 INFO L85 PathProgramCache]: Analyzing trace with hash -888704729, now seen corresponding path program 88 times [2022-04-06 20:43:23,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:23,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874906733] [2022-04-06 20:43:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:23,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:23,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:43:23,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:23,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874906733] [2022-04-06 20:43:23,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874906733] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:23,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174145728] [2022-04-06 20:43:23,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:23,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:23,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:23,270 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:23,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:43:23,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:23,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:23,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:43:23,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:43:23,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:43:23,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174145728] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:23,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:23,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:43:23,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:23,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1675489989] [2022-04-06 20:43:23,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1675489989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:23,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:23,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:43:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63537268] [2022-04-06 20:43:23,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:23,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:43:23,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:43:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:43:23,973 INFO L87 Difference]: Start difference. First operand 1479 states and 1936 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:26,844 INFO L93 Difference]: Finished difference Result 1761 states and 2273 transitions. [2022-04-06 20:43:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:43:26,845 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 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 53 [2022-04-06 20:43:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:26,847 INFO L225 Difference]: With dead ends: 1761 [2022-04-06 20:43:26,847 INFO L226 Difference]: Without dead ends: 1730 [2022-04-06 20:43:26,847 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=3210, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:43:26,847 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 166 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2888 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:26,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 181 Invalid, 2995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2888 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:43:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2022-04-06 20:43:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1479. [2022-04-06 20:43:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1474 states have (on average 1.3100407055630936) internal successors, (1931), 1474 states have internal predecessors, (1931), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 1935 transitions. [2022-04-06 20:43:28,226 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 1935 transitions. Word has length 53 [2022-04-06 20:43:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:28,226 INFO L478 AbstractCegarLoop]: Abstraction has 1479 states and 1935 transitions. [2022-04-06 20:43:28,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 1935 transitions. [2022-04-06 20:43:28,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:43:28,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:28,228 INFO L499 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:28,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 20:43:28,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:28,429 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:28,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:28,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1964626632, now seen corresponding path program 89 times [2022-04-06 20:43:28,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1176703313] [2022-04-06 20:43:28,430 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:28,430 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:28,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1964626632, now seen corresponding path program 90 times [2022-04-06 20:43:28,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:28,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062197962] [2022-04-06 20:43:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:28,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:29,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:43:29,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062197962] [2022-04-06 20:43:29,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062197962] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58388055] [2022-04-06 20:43:29,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:29,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:29,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:29,047 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:29,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:43:29,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:43:29,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:29,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:43:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 20:43:29,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2022-04-06 20:43:29,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58388055] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:29,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:29,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 6, 5] total 45 [2022-04-06 20:43:29,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:29,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1176703313] [2022-04-06 20:43:29,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1176703313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:29,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:29,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:43:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119410826] [2022-04-06 20:43:29,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:29,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:43:29,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:29,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:43:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1877, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:43:29,446 INFO L87 Difference]: Start difference. First operand 1479 states and 1935 transitions. Second operand has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 37 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:35,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:35,723 INFO L93 Difference]: Finished difference Result 2464 states and 3771 transitions. [2022-04-06 20:43:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:43:35,723 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 37 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:43:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:35,725 INFO L225 Difference]: With dead ends: 2464 [2022-04-06 20:43:35,725 INFO L226 Difference]: Without dead ends: 2404 [2022-04-06 20:43:35,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=266, Invalid=6214, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:43:35,726 INFO L913 BasicCegarLoop]: 185 mSDtfsCounter, 364 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 11389 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 11649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 11389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:35,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 357 Invalid, 11649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 11389 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:43:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-04-06 20:43:37,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1521. [2022-04-06 20:43:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1516 states have (on average 1.312664907651715) internal successors, (1990), 1516 states have internal predecessors, (1990), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1994 transitions. [2022-04-06 20:43:37,151 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1994 transitions. Word has length 53 [2022-04-06 20:43:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:37,151 INFO L478 AbstractCegarLoop]: Abstraction has 1521 states and 1994 transitions. [2022-04-06 20:43:37,151 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 37 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1994 transitions. [2022-04-06 20:43:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:43:37,152 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:37,152 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:37,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 20:43:37,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-04-06 20:43:37,353 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:37,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:37,353 INFO L85 PathProgramCache]: Analyzing trace with hash 729316996, now seen corresponding path program 69 times [2022-04-06 20:43:37,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:37,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1454143953] [2022-04-06 20:43:37,354 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:37,354 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:37,354 INFO L85 PathProgramCache]: Analyzing trace with hash 729316996, now seen corresponding path program 70 times [2022-04-06 20:43:37,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:37,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299022200] [2022-04-06 20:43:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:37,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:37,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:37,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:37,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299022200] [2022-04-06 20:43:37,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299022200] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:37,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422668283] [2022-04-06 20:43:37,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:37,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:37,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:37,787 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:37,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:43:37,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:37,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:37,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:43:37,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:43:38,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:43:38,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422668283] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:38,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:38,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15, 15] total 43 [2022-04-06 20:43:38,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:38,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1454143953] [2022-04-06 20:43:38,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1454143953] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:38,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:38,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:43:38,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683839104] [2022-04-06 20:43:38,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:38,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:43:38,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:38,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:43:38,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:43:38,394 INFO L87 Difference]: Start difference. First operand 1521 states and 1994 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:49,294 INFO L93 Difference]: Finished difference Result 2222 states and 3268 transitions. [2022-04-06 20:43:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-04-06 20:43:49,295 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:43:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:49,297 INFO L225 Difference]: With dead ends: 2222 [2022-04-06 20:43:49,297 INFO L226 Difference]: Without dead ends: 2059 [2022-04-06 20:43:49,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18744 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1400, Invalid=55006, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 20:43:49,299 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 226 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 12229 mSolverCounterSat, 844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 13073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 12229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:49,299 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 211 Invalid, 13073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [844 Valid, 12229 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 20:43:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-04-06 20:43:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1602. [2022-04-06 20:43:51,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1597 states have (on average 1.3174702567313714) internal successors, (2104), 1597 states have internal predecessors, (2104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2108 transitions. [2022-04-06 20:43:51,033 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2108 transitions. Word has length 54 [2022-04-06 20:43:51,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:51,033 INFO L478 AbstractCegarLoop]: Abstraction has 1602 states and 2108 transitions. [2022-04-06 20:43:51,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2108 transitions. [2022-04-06 20:43:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:43:51,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:51,036 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:51,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-04-06 20:43:51,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:51,237 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:51,238 INFO L85 PathProgramCache]: Analyzing trace with hash -986983626, now seen corresponding path program 71 times [2022-04-06 20:43:51,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:51,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [94576135] [2022-04-06 20:43:51,238 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:51,239 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:51,239 INFO L85 PathProgramCache]: Analyzing trace with hash -986983626, now seen corresponding path program 72 times [2022-04-06 20:43:51,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:51,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87596530] [2022-04-06 20:43:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:51,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:51,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:43:51,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:51,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87596530] [2022-04-06 20:43:51,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87596530] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:51,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615703762] [2022-04-06 20:43:51,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:51,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:51,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:51,605 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:51,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:43:51,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:43:51,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:43:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:43:52,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 20:43:53,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615703762] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:53,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:53,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 24] total 61 [2022-04-06 20:43:53,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:53,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [94576135] [2022-04-06 20:43:53,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [94576135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:53,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:53,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:43:53,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593876362] [2022-04-06 20:43:53,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:53,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:43:53,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:53,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:43:53,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=3247, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:43:53,152 INFO L87 Difference]: Start difference. First operand 1602 states and 2108 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:57,616 INFO L93 Difference]: Finished difference Result 1977 states and 2635 transitions. [2022-04-06 20:43:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:43:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:43:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:57,618 INFO L225 Difference]: With dead ends: 1977 [2022-04-06 20:43:57,618 INFO L226 Difference]: Without dead ends: 1688 [2022-04-06 20:43:57,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1493, Invalid=15537, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 20:43:57,619 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 131 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3186 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 3186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:57,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 152 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 3186 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:43:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2022-04-06 20:43:59,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1603. [2022-04-06 20:43:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1598 states have (on average 1.3135168961201502) internal successors, (2099), 1598 states have internal predecessors, (2099), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2103 transitions. [2022-04-06 20:43:59,370 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2103 transitions. Word has length 54 [2022-04-06 20:43:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:59,370 INFO L478 AbstractCegarLoop]: Abstraction has 1603 states and 2103 transitions. [2022-04-06 20:43:59,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2103 transitions. [2022-04-06 20:43:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:43:59,372 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:59,372 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:59,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 20:43:59,572 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:59,572 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:59,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:59,573 INFO L85 PathProgramCache]: Analyzing trace with hash 862055989, now seen corresponding path program 91 times [2022-04-06 20:43:59,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:59,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180358648] [2022-04-06 20:43:59,574 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:59,574 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:59,574 INFO L85 PathProgramCache]: Analyzing trace with hash 862055989, now seen corresponding path program 92 times [2022-04-06 20:43:59,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:59,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605618259] [2022-04-06 20:43:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:59,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:59,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 20:43:59,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:59,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605618259] [2022-04-06 20:43:59,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605618259] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:59,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290202625] [2022-04-06 20:43:59,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:59,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:59,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:59,818 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:59,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:43:59,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:59,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:43:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:44:00,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:44:01,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290202625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:01,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:01,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 32, 32] total 64 [2022-04-06 20:44:01,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180358648] [2022-04-06 20:44:01,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180358648] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:01,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:01,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:44:01,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994310701] [2022-04-06 20:44:01,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:01,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:44:01,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:01,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:44:01,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:44:01,240 INFO L87 Difference]: Start difference. First operand 1603 states and 2103 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:04,573 INFO L93 Difference]: Finished difference Result 1857 states and 2411 transitions. [2022-04-06 20:44:04,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:44:04,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 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 54 [2022-04-06 20:44:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:04,575 INFO L225 Difference]: With dead ends: 1857 [2022-04-06 20:44:04,575 INFO L226 Difference]: Without dead ends: 1824 [2022-04-06 20:44:04,576 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1192, Invalid=6640, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:44:04,576 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 153 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:04,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 174 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2718 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:44:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2022-04-06 20:44:06,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1603. [2022-04-06 20:44:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1598 states have (on average 1.3128911138923653) internal successors, (2098), 1598 states have internal predecessors, (2098), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2102 transitions. [2022-04-06 20:44:06,313 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2102 transitions. Word has length 54 [2022-04-06 20:44:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:06,313 INFO L478 AbstractCegarLoop]: Abstraction has 1603 states and 2102 transitions. [2022-04-06 20:44:06,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2102 transitions. [2022-04-06 20:44:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:44:06,315 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:06,315 INFO L499 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:06,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:06,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:06,515 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash 614220965, now seen corresponding path program 93 times [2022-04-06 20:44:06,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:06,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [359219748] [2022-04-06 20:44:06,518 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:06,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:06,518 INFO L85 PathProgramCache]: Analyzing trace with hash 614220965, now seen corresponding path program 94 times [2022-04-06 20:44:06,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:06,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077015535] [2022-04-06 20:44:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:06,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:07,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:44:07,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:07,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077015535] [2022-04-06 20:44:07,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077015535] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:07,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24389353] [2022-04-06 20:44:07,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:07,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:07,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:07,162 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:07,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:44:07,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:07,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:07,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:44:07,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:44:07,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 0 proven. 562 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:44:09,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24389353] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:09,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:09,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:44:09,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:09,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [359219748] [2022-04-06 20:44:09,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [359219748] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:09,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:09,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:44:09,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162971631] [2022-04-06 20:44:09,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:09,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:44:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:44:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1311, Invalid=4389, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:44:09,111 INFO L87 Difference]: Start difference. First operand 1603 states and 2102 transitions. Second operand has 39 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 38 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:16,184 INFO L93 Difference]: Finished difference Result 2616 states and 3992 transitions. [2022-04-06 20:44:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:44:16,184 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 38 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 20:44:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:16,187 INFO L225 Difference]: With dead ends: 2616 [2022-04-06 20:44:16,187 INFO L226 Difference]: Without dead ends: 2556 [2022-04-06 20:44:16,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2729, Invalid=9927, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:44:16,188 INFO L913 BasicCegarLoop]: 191 mSDtfsCounter, 377 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 12456 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 12725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 12456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:16,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 373 Invalid, 12725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 12456 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 20:44:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-04-06 20:44:17,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1647. [2022-04-06 20:44:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1642 states have (on average 1.315468940316687) internal successors, (2160), 1642 states have internal predecessors, (2160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2164 transitions. [2022-04-06 20:44:17,918 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2164 transitions. Word has length 54 [2022-04-06 20:44:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:17,918 INFO L478 AbstractCegarLoop]: Abstraction has 1647 states and 2164 transitions. [2022-04-06 20:44:17,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 38 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2164 transitions. [2022-04-06 20:44:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:44:17,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:17,920 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:17,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:18,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:18,120 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1398042664, now seen corresponding path program 73 times [2022-04-06 20:44:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:18,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [186433582] [2022-04-06 20:44:18,121 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:18,121 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1398042664, now seen corresponding path program 74 times [2022-04-06 20:44:18,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:18,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838809452] [2022-04-06 20:44:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:18,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:18,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:44:18,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838809452] [2022-04-06 20:44:18,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838809452] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772724406] [2022-04-06 20:44:18,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:18,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:18,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:18,520 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:18,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:44:18,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:18,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:44:18,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 33 proven. 121 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 20:44:19,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 33 proven. 121 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-04-06 20:44:19,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772724406] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:19,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:19,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14, 14] total 41 [2022-04-06 20:44:19,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:19,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [186433582] [2022-04-06 20:44:19,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [186433582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:19,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:19,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:44:19,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082168284] [2022-04-06 20:44:19,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:19,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:44:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:19,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:44:19,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1550, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:44:19,094 INFO L87 Difference]: Start difference. First operand 1647 states and 2164 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:24,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:24,273 INFO L93 Difference]: Finished difference Result 1899 states and 2570 transitions. [2022-04-06 20:44:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:44:24,274 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 55 [2022-04-06 20:44:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:24,275 INFO L225 Difference]: With dead ends: 1899 [2022-04-06 20:44:24,275 INFO L226 Difference]: Without dead ends: 1733 [2022-04-06 20:44:24,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2876 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=636, Invalid=13170, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:44:24,276 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 133 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4568 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 4797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 4568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:24,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 200 Invalid, 4797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 4568 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:44:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-04-06 20:44:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1648. [2022-04-06 20:44:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1643 states have (on average 1.3152769324406572) internal successors, (2161), 1643 states have internal predecessors, (2161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2165 transitions. [2022-04-06 20:44:26,025 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2165 transitions. Word has length 55 [2022-04-06 20:44:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:26,025 INFO L478 AbstractCegarLoop]: Abstraction has 1648 states and 2165 transitions. [2022-04-06 20:44:26,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2165 transitions. [2022-04-06 20:44:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:44:26,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:26,027 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:26,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-04-06 20:44:26,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-04-06 20:44:26,228 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1795926759, now seen corresponding path program 95 times [2022-04-06 20:44:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:26,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [417613175] [2022-04-06 20:44:26,229 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:26,229 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:26,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1795926759, now seen corresponding path program 96 times [2022-04-06 20:44:26,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:26,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723155893] [2022-04-06 20:44:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:26,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:26,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 20:44:26,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:26,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723155893] [2022-04-06 20:44:26,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723155893] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:26,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439711208] [2022-04-06 20:44:26,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:26,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:26,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:26,502 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:26,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:44:27,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:44:27,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:27,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:44:27,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 50 proven. 14 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-04-06 20:44:27,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-04-06 20:44:27,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439711208] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:27,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:27,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9, 8] total 33 [2022-04-06 20:44:27,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:27,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [417613175] [2022-04-06 20:44:27,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [417613175] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:27,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:27,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:44:27,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96405349] [2022-04-06 20:44:27,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:27,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:44:27,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:44:27,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:44:27,454 INFO L87 Difference]: Start difference. First operand 1648 states and 2165 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:30,850 INFO L93 Difference]: Finished difference Result 1942 states and 2516 transitions. [2022-04-06 20:44:30,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:44:30,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:44:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:30,852 INFO L225 Difference]: With dead ends: 1942 [2022-04-06 20:44:30,852 INFO L226 Difference]: Without dead ends: 1910 [2022-04-06 20:44:30,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=223, Invalid=2857, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:44:30,853 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 184 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2936 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:30,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 182 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2936 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:44:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-04-06 20:44:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1648. [2022-04-06 20:44:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1643 states have (on average 1.314668289713938) internal successors, (2160), 1643 states have internal predecessors, (2160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2164 transitions. [2022-04-06 20:44:32,629 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2164 transitions. Word has length 55 [2022-04-06 20:44:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:32,629 INFO L478 AbstractCegarLoop]: Abstraction has 1648 states and 2164 transitions. [2022-04-06 20:44:32,629 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:32,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2164 transitions. [2022-04-06 20:44:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:44:32,630 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:32,630 INFO L499 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:32,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 20:44:32,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 20:44:32,831 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:32,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1701318248, now seen corresponding path program 97 times [2022-04-06 20:44:32,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:32,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1256516837] [2022-04-06 20:44:32,832 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:32,832 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1701318248, now seen corresponding path program 98 times [2022-04-06 20:44:32,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:32,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638409989] [2022-04-06 20:44:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:32,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:33,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:44:33,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:33,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638409989] [2022-04-06 20:44:33,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638409989] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:33,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131933483] [2022-04-06 20:44:33,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:33,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:33,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:33,515 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:33,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:44:33,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:33,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:33,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:44:33,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:44:33,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:44:35,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131933483] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:35,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:35,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 20:44:35,535 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:35,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1256516837] [2022-04-06 20:44:35,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1256516837] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:35,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:35,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:44:35,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424564400] [2022-04-06 20:44:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:35,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:44:35,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:44:35,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=4622, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:44:35,537 INFO L87 Difference]: Start difference. First operand 1648 states and 2164 transitions. Second operand has 40 states, 40 states have (on average 1.275) internal successors, (51), 39 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:42,791 INFO L93 Difference]: Finished difference Result 2687 states and 4105 transitions. [2022-04-06 20:44:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:44:42,792 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 39 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:44:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:42,794 INFO L225 Difference]: With dead ends: 2687 [2022-04-06 20:44:42,794 INFO L226 Difference]: Without dead ends: 2627 [2022-04-06 20:44:42,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2878, Invalid=10462, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:44:42,795 INFO L913 BasicCegarLoop]: 197 mSDtfsCounter, 392 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 12849 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 13127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 12849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:42,795 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 379 Invalid, 13127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 12849 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 20:44:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2022-04-06 20:44:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 1692. [2022-04-06 20:44:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1687 states have (on average 1.3171310017783047) internal successors, (2222), 1687 states have internal predecessors, (2222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 2226 transitions. [2022-04-06 20:44:44,599 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 2226 transitions. Word has length 55 [2022-04-06 20:44:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:44,599 INFO L478 AbstractCegarLoop]: Abstraction has 1692 states and 2226 transitions. [2022-04-06 20:44:44,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 39 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 2226 transitions. [2022-04-06 20:44:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:44:44,601 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:44,601 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:44,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 20:44:44,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-06 20:44:44,801 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:44,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1255970954, now seen corresponding path program 75 times [2022-04-06 20:44:44,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:44,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1118989283] [2022-04-06 20:44:44,802 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:44,802 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1255970954, now seen corresponding path program 76 times [2022-04-06 20:44:44,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:44,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343526299] [2022-04-06 20:44:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:44,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:45,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:44:45,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:45,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343526299] [2022-04-06 20:44:45,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343526299] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:45,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369608443] [2022-04-06 20:44:45,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:45,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:45,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:45,211 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:45,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:44:45,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:45,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:45,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:44:45,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 24 proven. 144 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 20:44:45,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 24 proven. 144 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 20:44:45,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369608443] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:45,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:45,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15, 15] total 43 [2022-04-06 20:44:45,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:45,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1118989283] [2022-04-06 20:44:45,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1118989283] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:45,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:45,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:44:45,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232863237] [2022-04-06 20:44:45,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:45,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:44:45,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:45,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:44:45,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1711, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:44:45,829 INFO L87 Difference]: Start difference. First operand 1692 states and 2226 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:51,010 INFO L93 Difference]: Finished difference Result 1947 states and 2637 transitions. [2022-04-06 20:44:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:44:51,010 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:44:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:51,012 INFO L225 Difference]: With dead ends: 1947 [2022-04-06 20:44:51,012 INFO L226 Difference]: Without dead ends: 1778 [2022-04-06 20:44:51,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3430 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=697, Invalid=15305, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:44:51,013 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 126 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4092 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 4339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 4092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:51,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 170 Invalid, 4339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 4092 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:44:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-04-06 20:44:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1693. [2022-04-06 20:44:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1688 states have (on average 1.3169431279620853) internal successors, (2223), 1688 states have internal predecessors, (2223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 2227 transitions. [2022-04-06 20:44:52,874 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 2227 transitions. Word has length 56 [2022-04-06 20:44:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:52,874 INFO L478 AbstractCegarLoop]: Abstraction has 1693 states and 2227 transitions. [2022-04-06 20:44:52,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:52,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 2227 transitions. [2022-04-06 20:44:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:44:52,875 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:52,875 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:52,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:53,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:53,075 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:53,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1373284612, now seen corresponding path program 77 times [2022-04-06 20:44:53,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:53,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [144588670] [2022-04-06 20:44:53,076 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:53,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:53,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1373284612, now seen corresponding path program 78 times [2022-04-06 20:44:53,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:53,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90817293] [2022-04-06 20:44:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:53,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:53,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:44:53,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90817293] [2022-04-06 20:44:53,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90817293] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295521050] [2022-04-06 20:44:53,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:53,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:53,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:53,475 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:53,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:44:54,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:44:54,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:54,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:44:54,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:54,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:55,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295521050] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:55,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:55,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 32] total 64 [2022-04-06 20:44:55,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:55,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [144588670] [2022-04-06 20:44:55,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [144588670] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:55,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:55,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:44:55,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228332769] [2022-04-06 20:44:55,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:55,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:44:55,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:55,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:44:55,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=3440, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:44:55,564 INFO L87 Difference]: Start difference. First operand 1693 states and 2227 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:00,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:00,405 INFO L93 Difference]: Finished difference Result 2085 states and 2777 transitions. [2022-04-06 20:45:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:45:00,406 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 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 56 [2022-04-06 20:45:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:00,408 INFO L225 Difference]: With dead ends: 2085 [2022-04-06 20:45:00,408 INFO L226 Difference]: Without dead ends: 1783 [2022-04-06 20:45:00,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3222 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3037, Invalid=16145, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:45:00,409 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 148 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4343 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 4575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 4343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:00,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 190 Invalid, 4575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 4343 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:45:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-04-06 20:45:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1694. [2022-04-06 20:45:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1689 states have (on average 1.3132030787448195) internal successors, (2218), 1689 states have internal predecessors, (2218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:02,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2222 transitions. [2022-04-06 20:45:02,253 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2222 transitions. Word has length 56 [2022-04-06 20:45:02,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:02,254 INFO L478 AbstractCegarLoop]: Abstraction has 1694 states and 2222 transitions. [2022-04-06 20:45:02,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:02,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2222 transitions. [2022-04-06 20:45:02,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:45:02,255 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:02,255 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:02,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-04-06 20:45:02,456 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 20:45:02,457 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:02,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1915952933, now seen corresponding path program 99 times [2022-04-06 20:45:02,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:02,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [586170641] [2022-04-06 20:45:02,458 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:02,458 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:02,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1915952933, now seen corresponding path program 100 times [2022-04-06 20:45:02,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:02,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869635103] [2022-04-06 20:45:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:02,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:02,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 20:45:02,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869635103] [2022-04-06 20:45:02,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869635103] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099538338] [2022-04-06 20:45:02,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:02,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:02,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:02,720 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:02,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:45:02,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:02,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:02,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:45:02,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 20:45:02,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 20:45:03,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099538338] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:03,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:03,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 20:45:03,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:03,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [586170641] [2022-04-06 20:45:03,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [586170641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:03,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:03,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:45:03,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336960831] [2022-04-06 20:45:03,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:03,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:45:03,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:45:03,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:45:03,496 INFO L87 Difference]: Start difference. First operand 1694 states and 2222 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:06,980 INFO L93 Difference]: Finished difference Result 1959 states and 2543 transitions. [2022-04-06 20:45:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:45:06,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:45:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:06,983 INFO L225 Difference]: With dead ends: 1959 [2022-04-06 20:45:06,983 INFO L226 Difference]: Without dead ends: 1925 [2022-04-06 20:45:06,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=949, Invalid=3881, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:45:06,983 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 169 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 3198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:06,983 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 185 Invalid, 3198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3079 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:45:06,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2022-04-06 20:45:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1694. [2022-04-06 20:45:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1689 states have (on average 1.3126110124333925) internal successors, (2217), 1689 states have internal predecessors, (2217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2221 transitions. [2022-04-06 20:45:08,769 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2221 transitions. Word has length 56 [2022-04-06 20:45:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:08,769 INFO L478 AbstractCegarLoop]: Abstraction has 1694 states and 2221 transitions. [2022-04-06 20:45:08,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:08,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2221 transitions. [2022-04-06 20:45:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:45:08,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:08,771 INFO L499 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:08,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-06 20:45:08,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 20:45:08,972 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:08,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1041595653, now seen corresponding path program 101 times [2022-04-06 20:45:08,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:08,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [166855081] [2022-04-06 20:45:08,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:08,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1041595653, now seen corresponding path program 102 times [2022-04-06 20:45:08,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:08,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088548401] [2022-04-06 20:45:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:08,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:09,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:09,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088548401] [2022-04-06 20:45:09,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088548401] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:09,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050092394] [2022-04-06 20:45:09,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:09,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:09,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:09,675 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:09,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:45:09,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:45:09,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:09,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:45:09,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2022-04-06 20:45:09,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2022-04-06 20:45:09,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050092394] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:09,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:09,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 4, 4] total 43 [2022-04-06 20:45:09,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:09,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [166855081] [2022-04-06 20:45:09,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [166855081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:09,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:09,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:45:09,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39402573] [2022-04-06 20:45:09,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:09,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:45:09,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:45:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1719, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:45:09,915 INFO L87 Difference]: Start difference. First operand 1694 states and 2221 transitions. Second operand has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 40 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:17,583 INFO L93 Difference]: Finished difference Result 2759 states and 4213 transitions. [2022-04-06 20:45:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:45:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 40 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:45:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:17,586 INFO L225 Difference]: With dead ends: 2759 [2022-04-06 20:45:17,586 INFO L226 Difference]: Without dead ends: 2699 [2022-04-06 20:45:17,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=255, Invalid=6387, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:45:17,587 INFO L913 BasicCegarLoop]: 203 mSDtfsCounter, 405 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 13982 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 14269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 13982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:17,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 395 Invalid, 14269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 13982 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 20:45:17,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-04-06 20:45:19,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 1738. [2022-04-06 20:45:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1733 states have (on average 1.315060588574726) internal successors, (2279), 1733 states have internal predecessors, (2279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2283 transitions. [2022-04-06 20:45:19,450 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2283 transitions. Word has length 56 [2022-04-06 20:45:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:19,450 INFO L478 AbstractCegarLoop]: Abstraction has 1738 states and 2283 transitions. [2022-04-06 20:45:19,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 40 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2283 transitions. [2022-04-06 20:45:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:45:19,452 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:19,452 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:19,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:19,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:19,653 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:19,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1629438969, now seen corresponding path program 79 times [2022-04-06 20:45:19,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:19,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [329225290] [2022-04-06 20:45:19,654 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:19,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:19,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1629438969, now seen corresponding path program 80 times [2022-04-06 20:45:19,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:19,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91384016] [2022-04-06 20:45:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:19,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:19,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:19,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:19,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91384016] [2022-04-06 20:45:19,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91384016] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:19,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278679415] [2022-04-06 20:45:19,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:19,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:19,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:19,955 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:19,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:45:20,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:20,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:20,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:45:20,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:20,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:20,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278679415] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:20,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:20,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 33 [2022-04-06 20:45:20,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:20,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [329225290] [2022-04-06 20:45:20,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [329225290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:20,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:20,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:45:20,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027613581] [2022-04-06 20:45:20,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:20,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:45:20,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:20,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:45:20,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:45:20,345 INFO L87 Difference]: Start difference. First operand 1738 states and 2283 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:23,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 20:45:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:31,656 INFO L93 Difference]: Finished difference Result 4284 states and 5312 transitions. [2022-04-06 20:45:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:45:31,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 57 [2022-04-06 20:45:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:31,660 INFO L225 Difference]: With dead ends: 4284 [2022-04-06 20:45:31,660 INFO L226 Difference]: Without dead ends: 4105 [2022-04-06 20:45:31,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:45:31,661 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 159 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 152 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:31,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 111 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1093 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 20:45:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4105 states. [2022-04-06 20:45:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4105 to 1809. [2022-04-06 20:45:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1804 states have (on average 1.3098669623059866) internal successors, (2363), 1804 states have internal predecessors, (2363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2367 transitions. [2022-04-06 20:45:33,633 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2367 transitions. Word has length 57 [2022-04-06 20:45:33,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:33,633 INFO L478 AbstractCegarLoop]: Abstraction has 1809 states and 2367 transitions. [2022-04-06 20:45:33,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2367 transitions. [2022-04-06 20:45:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:45:33,635 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:33,635 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:33,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-04-06 20:45:33,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:33,835 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:33,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1146715240, now seen corresponding path program 81 times [2022-04-06 20:45:33,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:33,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111227217] [2022-04-06 20:45:33,836 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:33,836 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:33,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1146715240, now seen corresponding path program 82 times [2022-04-06 20:45:33,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:33,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023834946] [2022-04-06 20:45:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:33,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:34,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:34,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:34,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023834946] [2022-04-06 20:45:34,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023834946] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:34,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280282981] [2022-04-06 20:45:34,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:34,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:34,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:34,326 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:34,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:45:34,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:34,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:45:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 13 proven. 169 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:45:34,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 13 proven. 169 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-04-06 20:45:34,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280282981] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:34,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:34,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16, 16] total 46 [2022-04-06 20:45:34,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:34,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111227217] [2022-04-06 20:45:34,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111227217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:34,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:34,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:45:34,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139127786] [2022-04-06 20:45:34,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:34,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:45:34,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:34,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:45:34,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:45:34,984 INFO L87 Difference]: Start difference. First operand 1809 states and 2367 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:48,991 INFO L93 Difference]: Finished difference Result 2604 states and 3820 transitions. [2022-04-06 20:45:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-04-06 20:45:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:45:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:48,994 INFO L225 Difference]: With dead ends: 2604 [2022-04-06 20:45:48,994 INFO L226 Difference]: Without dead ends: 2431 [2022-04-06 20:45:48,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24773 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1605, Invalid=71025, Unknown=0, NotChecked=0, Total=72630 [2022-04-06 20:45:48,997 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 272 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 15600 mSolverCounterSat, 1050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 16650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1050 IncrementalHoareTripleChecker+Valid, 15600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:48,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 230 Invalid, 16650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1050 Valid, 15600 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-04-06 20:45:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2022-04-06 20:45:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1897. [2022-04-06 20:45:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1892 states have (on average 1.3144820295983086) internal successors, (2487), 1892 states have internal predecessors, (2487), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2491 transitions. [2022-04-06 20:45:51,358 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2491 transitions. Word has length 57 [2022-04-06 20:45:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:51,358 INFO L478 AbstractCegarLoop]: Abstraction has 1897 states and 2491 transitions. [2022-04-06 20:45:51,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2491 transitions. [2022-04-06 20:45:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:45:51,359 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:51,360 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:51,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:51,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-04-06 20:45:51,560 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:51,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1096452344, now seen corresponding path program 83 times [2022-04-06 20:45:51,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:51,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1621886472] [2022-04-06 20:45:51,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:51,561 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:51,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1096452344, now seen corresponding path program 84 times [2022-04-06 20:45:51,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:51,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977663896] [2022-04-06 20:45:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:51,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:51,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:45:51,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:51,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977663896] [2022-04-06 20:45:51,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977663896] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:51,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472530860] [2022-04-06 20:45:51,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:51,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:51,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:51,975 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:51,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 20:45:52,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 20:45:52,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:52,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 20:45:52,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:45:53,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 20:45:54,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472530860] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:54,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:54,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 26] total 66 [2022-04-06 20:45:54,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:54,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1621886472] [2022-04-06 20:45:54,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1621886472] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:54,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:54,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:45:54,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374588804] [2022-04-06 20:45:54,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:54,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:45:54,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:45:54,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=3817, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:45:54,143 INFO L87 Difference]: Start difference. First operand 1897 states and 2491 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:59,943 INFO L93 Difference]: Finished difference Result 2160 states and 2914 transitions. [2022-04-06 20:45:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 20:45:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:45:59,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:59,945 INFO L225 Difference]: With dead ends: 2160 [2022-04-06 20:45:59,945 INFO L226 Difference]: Without dead ends: 1987 [2022-04-06 20:45:59,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5094 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1838, Invalid=20214, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 20:45:59,947 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 143 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4219 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 4478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 4219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:59,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 175 Invalid, 4478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 4219 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:45:59,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2022-04-06 20:46:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1898. [2022-04-06 20:46:02,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1893 states have (on average 1.3143159006867406) internal successors, (2488), 1893 states have internal predecessors, (2488), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2492 transitions. [2022-04-06 20:46:02,203 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2492 transitions. Word has length 57 [2022-04-06 20:46:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:02,203 INFO L478 AbstractCegarLoop]: Abstraction has 1898 states and 2492 transitions. [2022-04-06 20:46:02,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2492 transitions. [2022-04-06 20:46:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:46:02,204 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:02,204 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:02,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-04-06 20:46:02,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:02,405 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:02,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash 81300135, now seen corresponding path program 103 times [2022-04-06 20:46:02,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:02,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1571384726] [2022-04-06 20:46:02,406 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:02,406 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash 81300135, now seen corresponding path program 104 times [2022-04-06 20:46:02,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:02,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350486514] [2022-04-06 20:46:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:02,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:02,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-04-06 20:46:02,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:02,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350486514] [2022-04-06 20:46:02,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350486514] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:02,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663962793] [2022-04-06 20:46:02,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:02,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:02,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:02,695 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:02,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 20:46:02,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:02,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:46:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:46:03,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:46:04,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663962793] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:04,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:04,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 38, 38] total 76 [2022-04-06 20:46:04,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:04,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1571384726] [2022-04-06 20:46:04,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1571384726] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:04,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:04,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:46:04,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811929906] [2022-04-06 20:46:04,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:04,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:46:04,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:04,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:46:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=816, Invalid=4884, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:46:04,678 INFO L87 Difference]: Start difference. First operand 1898 states and 2492 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:09,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:09,004 INFO L93 Difference]: Finished difference Result 2232 states and 2885 transitions. [2022-04-06 20:46:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:46:09,004 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 57 [2022-04-06 20:46:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:09,006 INFO L225 Difference]: With dead ends: 2232 [2022-04-06 20:46:09,007 INFO L226 Difference]: Without dead ends: 2199 [2022-04-06 20:46:09,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1419, Invalid=8481, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:46:09,007 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 197 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3650 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 3650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:09,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 203 Invalid, 3778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 3650 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:46:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2022-04-06 20:46:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 1898. [2022-04-06 20:46:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1893 states have (on average 1.3137876386687797) internal successors, (2487), 1893 states have internal predecessors, (2487), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2491 transitions. [2022-04-06 20:46:11,231 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2491 transitions. Word has length 57 [2022-04-06 20:46:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:11,231 INFO L478 AbstractCegarLoop]: Abstraction has 1898 states and 2491 transitions. [2022-04-06 20:46:11,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2491 transitions. [2022-04-06 20:46:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:46:11,232 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:11,232 INFO L499 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:11,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:11,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:11,433 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:11,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2065031688, now seen corresponding path program 105 times [2022-04-06 20:46:11,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:11,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265663447] [2022-04-06 20:46:11,434 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:11,434 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:11,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2065031688, now seen corresponding path program 106 times [2022-04-06 20:46:11,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:11,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174884273] [2022-04-06 20:46:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:11,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:12,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 667 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:12,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:12,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174884273] [2022-04-06 20:46:12,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174884273] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:12,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364570619] [2022-04-06 20:46:12,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:12,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:12,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:12,182 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:12,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 20:46:12,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:12,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:46:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 667 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:12,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 667 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:14,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364570619] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:14,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:14,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 20:46:14,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:14,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265663447] [2022-04-06 20:46:14,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265663447] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:14,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:14,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:46:14,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52863843] [2022-04-06 20:46:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:14,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:46:14,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:46:14,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1536, Invalid=5106, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:46:14,435 INFO L87 Difference]: Start difference. First operand 1898 states and 2491 transitions. Second operand has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 41 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:22,895 INFO L93 Difference]: Finished difference Result 3041 states and 4625 transitions. [2022-04-06 20:46:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:46:22,896 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 41 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 20:46:22,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:22,898 INFO L225 Difference]: With dead ends: 3041 [2022-04-06 20:46:22,899 INFO L226 Difference]: Without dead ends: 2979 [2022-04-06 20:46:22,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3188, Invalid=11574, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:46:22,899 INFO L913 BasicCegarLoop]: 209 mSDtfsCounter, 420 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 14397 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 14693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 14397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:22,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 401 Invalid, 14693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 14397 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-04-06 20:46:22,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2022-04-06 20:46:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 1946. [2022-04-06 20:46:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1941 states have (on average 1.3163317877382792) internal successors, (2555), 1941 states have internal predecessors, (2555), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2559 transitions. [2022-04-06 20:46:25,208 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2559 transitions. Word has length 57 [2022-04-06 20:46:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:25,208 INFO L478 AbstractCegarLoop]: Abstraction has 1946 states and 2559 transitions. [2022-04-06 20:46:25,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 41 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2559 transitions. [2022-04-06 20:46:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:46:25,210 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:25,210 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:25,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-06 20:46:25,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-04-06 20:46:25,410 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:25,411 INFO L85 PathProgramCache]: Analyzing trace with hash -348886652, now seen corresponding path program 85 times [2022-04-06 20:46:25,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:25,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1898295878] [2022-04-06 20:46:25,411 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:25,411 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:25,411 INFO L85 PathProgramCache]: Analyzing trace with hash -348886652, now seen corresponding path program 86 times [2022-04-06 20:46:25,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:25,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135072212] [2022-04-06 20:46:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:25,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:25,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:46:25,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135072212] [2022-04-06 20:46:25,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135072212] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219436587] [2022-04-06 20:46:25,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:25,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:25,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:25,859 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:25,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 20:46:25,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:25,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:46:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 36 proven. 144 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 20:46:26,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 36 proven. 144 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 20:46:26,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219436587] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:26,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:26,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15, 15] total 44 [2022-04-06 20:46:26,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:26,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1898295878] [2022-04-06 20:46:26,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1898295878] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:26,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:26,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:46:26,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725986114] [2022-04-06 20:46:26,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:26,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:46:26,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:26,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:46:26,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1795, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:46:26,486 INFO L87 Difference]: Start difference. First operand 1946 states and 2559 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:32,419 INFO L93 Difference]: Finished difference Result 2212 states and 2987 transitions. [2022-04-06 20:46:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 20:46:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 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 58 [2022-04-06 20:46:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:32,421 INFO L225 Difference]: With dead ends: 2212 [2022-04-06 20:46:32,421 INFO L226 Difference]: Without dead ends: 2036 [2022-04-06 20:46:32,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4033 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=749, Invalid=17341, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:46:32,422 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 143 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3983 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 4262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 3983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:32,422 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 155 Invalid, 4262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 3983 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:46:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2022-04-06 20:46:34,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1947. [2022-04-06 20:46:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1942 states have (on average 1.3161688980432544) internal successors, (2556), 1942 states have internal predecessors, (2556), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2560 transitions. [2022-04-06 20:46:34,681 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2560 transitions. Word has length 58 [2022-04-06 20:46:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:34,681 INFO L478 AbstractCegarLoop]: Abstraction has 1947 states and 2560 transitions. [2022-04-06 20:46:34,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2560 transitions. [2022-04-06 20:46:34,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:46:34,683 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:34,683 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:34,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-04-06 20:46:34,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:34,883 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:34,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:34,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1746478859, now seen corresponding path program 107 times [2022-04-06 20:46:34,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:34,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [466977866] [2022-04-06 20:46:34,884 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:34,884 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:34,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1746478859, now seen corresponding path program 108 times [2022-04-06 20:46:34,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:34,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169673036] [2022-04-06 20:46:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:34,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:35,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 20:46:35,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:35,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169673036] [2022-04-06 20:46:35,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169673036] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:35,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138044975] [2022-04-06 20:46:35,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:35,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:35,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:35,178 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:35,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 20:46:36,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:46:36,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:46:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 20:46:36,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 20:46:37,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138044975] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:37,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:37,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:46:37,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:37,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [466977866] [2022-04-06 20:46:37,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [466977866] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:37,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:37,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:46:37,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800933366] [2022-04-06 20:46:37,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:37,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:46:37,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:46:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:46:37,075 INFO L87 Difference]: Start difference. First operand 1947 states and 2560 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:41,179 INFO L93 Difference]: Finished difference Result 2250 states and 2921 transitions. [2022-04-06 20:46:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:46:41,180 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 58 [2022-04-06 20:46:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:41,182 INFO L225 Difference]: With dead ends: 2250 [2022-04-06 20:46:41,182 INFO L226 Difference]: Without dead ends: 2215 [2022-04-06 20:46:41,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1033, Invalid=4223, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:46:41,183 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 182 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:41,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 186 Invalid, 3278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 3144 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:46:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2022-04-06 20:46:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1947. [2022-04-06 20:46:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1942 states have (on average 1.315653964984552) internal successors, (2555), 1942 states have internal predecessors, (2555), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2559 transitions. [2022-04-06 20:46:43,490 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2559 transitions. Word has length 58 [2022-04-06 20:46:43,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:43,490 INFO L478 AbstractCegarLoop]: Abstraction has 1947 states and 2559 transitions. [2022-04-06 20:46:43,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2559 transitions. [2022-04-06 20:46:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:46:43,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:43,492 INFO L499 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:43,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-04-06 20:46:43,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-06 20:46:43,692 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash -568189595, now seen corresponding path program 109 times [2022-04-06 20:46:43,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:43,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [367841929] [2022-04-06 20:46:43,693 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:43,693 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:43,693 INFO L85 PathProgramCache]: Analyzing trace with hash -568189595, now seen corresponding path program 110 times [2022-04-06 20:46:43,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:43,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613822945] [2022-04-06 20:46:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:43,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:44,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:44,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:44,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613822945] [2022-04-06 20:46:44,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613822945] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:44,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821487276] [2022-04-06 20:46:44,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:44,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:44,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:44,462 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:44,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 20:46:44,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:44,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:46:44,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:44,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:46,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821487276] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:46,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:46,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 20:46:46,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:46,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [367841929] [2022-04-06 20:46:46,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [367841929] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:46,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:46,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:46:46,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840988798] [2022-04-06 20:46:46,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:46,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:46:46,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:46:46,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1615, Invalid=5357, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:46:46,830 INFO L87 Difference]: Start difference. First operand 1947 states and 2559 transitions. Second operand has 43 states, 43 states have (on average 1.255813953488372) internal successors, (54), 42 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:55,921 INFO L93 Difference]: Finished difference Result 3117 states and 4746 transitions. [2022-04-06 20:46:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:46:55,921 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.255813953488372) internal successors, (54), 42 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:46:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:55,925 INFO L225 Difference]: With dead ends: 3117 [2022-04-06 20:46:55,925 INFO L226 Difference]: Without dead ends: 3055 [2022-04-06 20:46:55,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3349, Invalid=12151, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:46:55,926 INFO L913 BasicCegarLoop]: 215 mSDtfsCounter, 434 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 15596 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 15901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 15596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:55,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 417 Invalid, 15901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 15596 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-04-06 20:46:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2022-04-06 20:46:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 1995. [2022-04-06 20:46:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1990 states have (on average 1.3180904522613066) internal successors, (2623), 1990 states have internal predecessors, (2623), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 2627 transitions. [2022-04-06 20:46:58,285 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 2627 transitions. Word has length 58 [2022-04-06 20:46:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:58,285 INFO L478 AbstractCegarLoop]: Abstraction has 1995 states and 2627 transitions. [2022-04-06 20:46:58,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.255813953488372) internal successors, (54), 42 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 2627 transitions. [2022-04-06 20:46:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:46:58,286 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:58,286 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:58,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-04-06 20:46:58,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:58,487 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:58,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:58,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1136706394, now seen corresponding path program 13 times [2022-04-06 20:46:58,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:58,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1969561251] [2022-04-06 20:46:58,488 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:58,488 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1136706394, now seen corresponding path program 14 times [2022-04-06 20:46:58,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:58,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032007022] [2022-04-06 20:46:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:58,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:58,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:46:58,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:58,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032007022] [2022-04-06 20:46:58,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032007022] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:58,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137264941] [2022-04-06 20:46:58,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:58,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:58,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:58,661 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:58,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 20:46:58,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:58,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:58,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:46:58,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:46:58,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:46:58,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137264941] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:58,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:58,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 15 [2022-04-06 20:46:58,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:58,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1969561251] [2022-04-06 20:46:58,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1969561251] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:58,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:58,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:46:58,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633170336] [2022-04-06 20:46:58,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:58,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:46:58,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:58,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:46:58,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:46:58,908 INFO L87 Difference]: Start difference. First operand 1995 states and 2627 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:07,272 INFO L93 Difference]: Finished difference Result 4323 states and 5317 transitions. [2022-04-06 20:47:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:47:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 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 59 [2022-04-06 20:47:07,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:07,276 INFO L225 Difference]: With dead ends: 4323 [2022-04-06 20:47:07,276 INFO L226 Difference]: Without dead ends: 3880 [2022-04-06 20:47:07,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:47:07,277 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 60 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:07,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 108 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:47:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2022-04-06 20:47:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 1951. [2022-04-06 20:47:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1946 states have (on average 1.3129496402877698) internal successors, (2555), 1946 states have internal predecessors, (2555), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2559 transitions. [2022-04-06 20:47:09,709 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2559 transitions. Word has length 59 [2022-04-06 20:47:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:09,709 INFO L478 AbstractCegarLoop]: Abstraction has 1951 states and 2559 transitions. [2022-04-06 20:47:09,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2559 transitions. [2022-04-06 20:47:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:47:09,711 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:09,711 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:09,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:09,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-06 20:47:09,911 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:09,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:09,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1350813320, now seen corresponding path program 87 times [2022-04-06 20:47:09,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:09,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1396416436] [2022-04-06 20:47:09,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:09,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:09,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1350813320, now seen corresponding path program 88 times [2022-04-06 20:47:09,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:09,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202911650] [2022-04-06 20:47:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:09,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:10,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:47:10,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:10,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202911650] [2022-04-06 20:47:10,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202911650] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:10,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673042500] [2022-04-06 20:47:10,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:10,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:10,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:10,401 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:10,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 20:47:10,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:10,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:10,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:47:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 26 proven. 169 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-04-06 20:47:10,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 26 proven. 169 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-04-06 20:47:11,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673042500] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:11,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:11,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16, 16] total 46 [2022-04-06 20:47:11,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:11,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1396416436] [2022-04-06 20:47:11,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1396416436] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:11,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:11,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:47:11,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029971607] [2022-04-06 20:47:11,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:11,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:47:11,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:47:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1968, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:47:11,078 INFO L87 Difference]: Start difference. First operand 1951 states and 2559 transitions. Second operand has 32 states, 32 states have (on average 1.3125) internal successors, (42), 31 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:17,459 INFO L93 Difference]: Finished difference Result 2238 states and 3026 transitions. [2022-04-06 20:47:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 20:47:17,459 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 31 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:47:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:17,461 INFO L225 Difference]: With dead ends: 2238 [2022-04-06 20:47:17,461 INFO L226 Difference]: Without dead ends: 2049 [2022-04-06 20:47:17,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4124 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=764, Invalid=18142, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:47:17,463 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 128 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4726 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 4987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 4726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:17,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 180 Invalid, 4987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 4726 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:47:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-04-06 20:47:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1952. [2022-04-06 20:47:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1947 states have (on average 1.312788906009245) internal successors, (2556), 1947 states have internal predecessors, (2556), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2560 transitions. [2022-04-06 20:47:19,831 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2560 transitions. Word has length 59 [2022-04-06 20:47:19,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:19,832 INFO L478 AbstractCegarLoop]: Abstraction has 1952 states and 2560 transitions. [2022-04-06 20:47:19,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 31 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:19,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2560 transitions. [2022-04-06 20:47:19,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:47:19,833 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:19,833 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:19,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-04-06 20:47:20,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 20:47:20,033 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:20,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:20,034 INFO L85 PathProgramCache]: Analyzing trace with hash -41549593, now seen corresponding path program 111 times [2022-04-06 20:47:20,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:20,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2029724678] [2022-04-06 20:47:20,035 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:20,035 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash -41549593, now seen corresponding path program 112 times [2022-04-06 20:47:20,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:20,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426008101] [2022-04-06 20:47:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:20,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:20,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-04-06 20:47:20,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:20,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426008101] [2022-04-06 20:47:20,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426008101] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:20,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250712707] [2022-04-06 20:47:20,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:20,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:20,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:20,321 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:20,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 20:47:20,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:20,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:47:20,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-04-06 20:47:20,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-04-06 20:47:21,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250712707] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:21,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:21,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:47:21,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:21,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2029724678] [2022-04-06 20:47:21,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2029724678] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:21,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:21,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:47:21,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873802778] [2022-04-06 20:47:21,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:21,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:47:21,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:21,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:47:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:47:21,147 INFO L87 Difference]: Start difference. First operand 1952 states and 2560 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:25,242 INFO L93 Difference]: Finished difference Result 2234 states and 2906 transitions. [2022-04-06 20:47:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:47:25,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 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 59 [2022-04-06 20:47:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:25,244 INFO L225 Difference]: With dead ends: 2234 [2022-04-06 20:47:25,244 INFO L226 Difference]: Without dead ends: 2197 [2022-04-06 20:47:25,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1115, Invalid=4737, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:47:25,245 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 158 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2611 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:25,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 164 Invalid, 2738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2611 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:47:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2022-04-06 20:47:27,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1952. [2022-04-06 20:47:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1947 states have (on average 1.3122752953261427) internal successors, (2555), 1947 states have internal predecessors, (2555), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2559 transitions. [2022-04-06 20:47:27,654 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2559 transitions. Word has length 59 [2022-04-06 20:47:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:27,654 INFO L478 AbstractCegarLoop]: Abstraction has 1952 states and 2559 transitions. [2022-04-06 20:47:27,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2559 transitions. [2022-04-06 20:47:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:47:27,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:27,656 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:27,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-04-06 20:47:27,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-04-06 20:47:27,858 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1386004200, now seen corresponding path program 89 times [2022-04-06 20:47:27,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:27,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1757360276] [2022-04-06 20:47:27,859 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:27,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:27,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1386004200, now seen corresponding path program 90 times [2022-04-06 20:47:27,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:27,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730769691] [2022-04-06 20:47:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:27,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:28,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:47:28,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:28,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730769691] [2022-04-06 20:47:28,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730769691] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:28,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223588667] [2022-04-06 20:47:28,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:28,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:28,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:28,307 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:28,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 20:47:29,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:47:29,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:47:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:29,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:30,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223588667] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:30,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:30,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 34] total 68 [2022-04-06 20:47:30,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:30,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1757360276] [2022-04-06 20:47:30,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1757360276] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:30,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:30,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:47:30,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862977281] [2022-04-06 20:47:30,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:30,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:47:30,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:47:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=3893, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:47:30,613 INFO L87 Difference]: Start difference. First operand 1952 states and 2559 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:36,446 INFO L93 Difference]: Finished difference Result 2388 states and 3177 transitions. [2022-04-06 20:47:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:47:36,447 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 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 59 [2022-04-06 20:47:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:36,449 INFO L225 Difference]: With dead ends: 2388 [2022-04-06 20:47:36,449 INFO L226 Difference]: Without dead ends: 2054 [2022-04-06 20:47:36,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3974 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3575, Invalid=19377, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 20:47:36,450 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 151 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4291 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 4547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 4291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:36,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 173 Invalid, 4547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 4291 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:47:36,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-04-06 20:47:38,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1953. [2022-04-06 20:47:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1948 states have (on average 1.3090349075975358) internal successors, (2550), 1948 states have internal predecessors, (2550), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2554 transitions. [2022-04-06 20:47:38,860 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2554 transitions. Word has length 59 [2022-04-06 20:47:38,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:38,860 INFO L478 AbstractCegarLoop]: Abstraction has 1953 states and 2554 transitions. [2022-04-06 20:47:38,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2554 transitions. [2022-04-06 20:47:38,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:47:38,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:38,861 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:38,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-04-06 20:47:39,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-04-06 20:47:39,062 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:39,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:39,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1391841817, now seen corresponding path program 113 times [2022-04-06 20:47:39,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:39,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [697046368] [2022-04-06 20:47:39,063 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:39,063 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:39,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1391841817, now seen corresponding path program 114 times [2022-04-06 20:47:39,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:39,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564432834] [2022-04-06 20:47:39,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:39,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:39,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-04-06 20:47:39,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:39,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564432834] [2022-04-06 20:47:39,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564432834] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:39,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734113508] [2022-04-06 20:47:39,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:39,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:39,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:39,369 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:39,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 20:47:39,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:47:39,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:47:39,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-04-06 20:47:40,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-04-06 20:47:40,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734113508] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:40,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:40,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8, 8] total 34 [2022-04-06 20:47:40,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:40,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [697046368] [2022-04-06 20:47:40,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [697046368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:40,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:40,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:47:40,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903765856] [2022-04-06 20:47:40,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:40,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:47:40,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:40,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:47:40,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:47:40,219 INFO L87 Difference]: Start difference. First operand 1953 states and 2554 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:44,800 INFO L93 Difference]: Finished difference Result 2309 states and 2978 transitions. [2022-04-06 20:47:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:47:44,801 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:47:44,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:44,803 INFO L225 Difference]: With dead ends: 2309 [2022-04-06 20:47:44,803 INFO L226 Difference]: Without dead ends: 2275 [2022-04-06 20:47:44,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=3189, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:47:44,804 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 198 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3979 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 4104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:44,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 211 Invalid, 4104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3979 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:47:44,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2022-04-06 20:47:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1953. [2022-04-06 20:47:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1948 states have (on average 1.3085215605749487) internal successors, (2549), 1948 states have internal predecessors, (2549), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2553 transitions. [2022-04-06 20:47:47,206 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2553 transitions. Word has length 59 [2022-04-06 20:47:47,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:47,206 INFO L478 AbstractCegarLoop]: Abstraction has 1953 states and 2553 transitions. [2022-04-06 20:47:47,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:47,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2553 transitions. [2022-04-06 20:47:47,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:47:47,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:47,208 INFO L499 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:47,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-04-06 20:47:47,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:47,408 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:47,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash -593670744, now seen corresponding path program 115 times [2022-04-06 20:47:47,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:47,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [473030806] [2022-04-06 20:47:47,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:47,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:47,409 INFO L85 PathProgramCache]: Analyzing trace with hash -593670744, now seen corresponding path program 116 times [2022-04-06 20:47:47,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:47,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358304673] [2022-04-06 20:47:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:47,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:48,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:48,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358304673] [2022-04-06 20:47:48,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358304673] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:48,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086640675] [2022-04-06 20:47:48,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:48,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:48,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:48,211 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:48,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 20:47:48,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:48,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:48,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:47:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:48,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:50,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086640675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:50,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:50,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 20:47:50,785 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:50,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [473030806] [2022-04-06 20:47:50,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [473030806] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:50,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:50,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:47:50,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035350552] [2022-04-06 20:47:50,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:50,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:47:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:50,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:47:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1696, Invalid=5614, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:47:50,786 INFO L87 Difference]: Start difference. First operand 1953 states and 2553 transitions. Second operand has 44 states, 44 states have (on average 1.25) internal successors, (55), 43 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:00,301 INFO L93 Difference]: Finished difference Result 3230 states and 4951 transitions. [2022-04-06 20:48:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:48:00,301 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.25) internal successors, (55), 43 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:48:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:00,304 INFO L225 Difference]: With dead ends: 3230 [2022-04-06 20:48:00,304 INFO L226 Difference]: Without dead ends: 3164 [2022-04-06 20:48:00,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3514, Invalid=12742, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:48:00,305 INFO L913 BasicCegarLoop]: 218 mSDtfsCounter, 429 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 15876 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 16183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 15876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:00,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 420 Invalid, 16183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 15876 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-04-06 20:48:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2022-04-06 20:48:02,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 2000. [2022-04-06 20:48:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1995 states have (on average 1.3107769423558897) internal successors, (2615), 1995 states have internal predecessors, (2615), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2619 transitions. [2022-04-06 20:48:02,936 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2619 transitions. Word has length 59 [2022-04-06 20:48:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:02,936 INFO L478 AbstractCegarLoop]: Abstraction has 2000 states and 2619 transitions. [2022-04-06 20:48:02,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.25) internal successors, (55), 43 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2619 transitions. [2022-04-06 20:48:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:48:02,938 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:02,938 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:02,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-04-06 20:48:03,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:03,138 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1793062396, now seen corresponding path program 91 times [2022-04-06 20:48:03,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:03,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [246408820] [2022-04-06 20:48:03,139 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:03,139 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1793062396, now seen corresponding path program 92 times [2022-04-06 20:48:03,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:03,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225184019] [2022-04-06 20:48:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:03,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:03,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:03,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:03,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225184019] [2022-04-06 20:48:03,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225184019] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:03,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365732716] [2022-04-06 20:48:03,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:03,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:03,723 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:03,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 20:48:03,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:03,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 20:48:03,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:48:04,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 14 proven. 196 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:48:04,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365732716] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:04,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:04,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 17, 17] total 49 [2022-04-06 20:48:04,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:04,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [246408820] [2022-04-06 20:48:04,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [246408820] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:04,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:04,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:48:04,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377268922] [2022-04-06 20:48:04,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:04,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:48:04,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:48:04,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:48:04,475 INFO L87 Difference]: Start difference. First operand 2000 states and 2619 transitions. Second operand has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:21,966 INFO L93 Difference]: Finished difference Result 2905 states and 4281 transitions. [2022-04-06 20:48:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2022-04-06 20:48:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:48:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:21,969 INFO L225 Difference]: With dead ends: 2905 [2022-04-06 20:48:21,969 INFO L226 Difference]: Without dead ends: 2712 [2022-04-06 20:48:21,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32166 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1824, Invalid=90288, Unknown=0, NotChecked=0, Total=92112 [2022-04-06 20:48:21,972 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 303 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 18686 mSolverCounterSat, 1177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 19863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1177 IncrementalHoareTripleChecker+Valid, 18686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:21,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 254 Invalid, 19863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1177 Valid, 18686 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-04-06 20:48:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2022-04-06 20:48:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2095. [2022-04-06 20:48:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2090 states have (on average 1.315311004784689) internal successors, (2749), 2090 states have internal predecessors, (2749), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 2753 transitions. [2022-04-06 20:48:25,038 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 2753 transitions. Word has length 60 [2022-04-06 20:48:25,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:25,038 INFO L478 AbstractCegarLoop]: Abstraction has 2095 states and 2753 transitions. [2022-04-06 20:48:25,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 33 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:25,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 2753 transitions. [2022-04-06 20:48:25,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:48:25,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:25,040 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:25,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-04-06 20:48:25,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:25,240 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash -450738698, now seen corresponding path program 93 times [2022-04-06 20:48:25,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:25,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [126656844] [2022-04-06 20:48:25,241 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:25,241 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash -450738698, now seen corresponding path program 94 times [2022-04-06 20:48:25,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:25,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962363560] [2022-04-06 20:48:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:25,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:48:25,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:25,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962363560] [2022-04-06 20:48:25,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962363560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:25,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51092312] [2022-04-06 20:48:25,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:25,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:25,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:25,721 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:25,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 20:48:25,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:25,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:48:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 48 proven. 144 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-04-06 20:48:26,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 48 proven. 144 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-04-06 20:48:26,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51092312] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:26,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:26,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 15, 15] total 45 [2022-04-06 20:48:26,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [126656844] [2022-04-06 20:48:26,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [126656844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:26,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:26,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:48:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245828431] [2022-04-06 20:48:26,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:26,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:48:26,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:48:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1881, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:48:26,361 INFO L87 Difference]: Start difference. First operand 2095 states and 2753 transitions. Second operand has 32 states, 32 states have (on average 1.3125) internal successors, (42), 31 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:33,631 INFO L93 Difference]: Finished difference Result 2390 states and 3232 transitions. [2022-04-06 20:48:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 20:48:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 31 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:48:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:33,634 INFO L225 Difference]: With dead ends: 2390 [2022-04-06 20:48:33,634 INFO L226 Difference]: Without dead ends: 2197 [2022-04-06 20:48:33,635 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4124 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=755, Invalid=17877, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:48:33,635 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 151 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5520 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 5790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 5520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:33,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 208 Invalid, 5790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 5520 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:48:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2022-04-06 20:48:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2096. [2022-04-06 20:48:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2091 states have (on average 1.3151602104256337) internal successors, (2750), 2091 states have internal predecessors, (2750), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2754 transitions. [2022-04-06 20:48:36,821 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2754 transitions. Word has length 60 [2022-04-06 20:48:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:36,821 INFO L478 AbstractCegarLoop]: Abstraction has 2096 states and 2754 transitions. [2022-04-06 20:48:36,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 31 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2754 transitions. [2022-04-06 20:48:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:48:36,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:36,822 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:36,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:37,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:37,023 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:37,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:37,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1769409051, now seen corresponding path program 117 times [2022-04-06 20:48:37,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:37,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267491540] [2022-04-06 20:48:37,024 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:37,024 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1769409051, now seen corresponding path program 118 times [2022-04-06 20:48:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:37,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440905319] [2022-04-06 20:48:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:37,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-04-06 20:48:37,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:37,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440905319] [2022-04-06 20:48:37,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440905319] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:37,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668094046] [2022-04-06 20:48:37,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:37,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:37,399 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:37,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 20:48:37,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:37,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:37,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:48:37,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-04-06 20:48:37,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-04-06 20:48:38,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668094046] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:38,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:38,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:48:38,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:38,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267491540] [2022-04-06 20:48:38,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267491540] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:38,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:38,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:48:38,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808226471] [2022-04-06 20:48:38,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:38,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:48:38,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:38,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:48:38,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1819, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:48:38,312 INFO L87 Difference]: Start difference. First operand 2096 states and 2754 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:43,128 INFO L93 Difference]: Finished difference Result 2420 states and 3145 transitions. [2022-04-06 20:48:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:48:43,128 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:48:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:43,130 INFO L225 Difference]: With dead ends: 2420 [2022-04-06 20:48:43,130 INFO L226 Difference]: Without dead ends: 2384 [2022-04-06 20:48:43,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1121, Invalid=4579, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:48:43,131 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 187 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3284 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 3284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:43,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 189 Invalid, 3418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 3284 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:48:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2022-04-06 20:48:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2096. [2022-04-06 20:48:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2091 states have (on average 1.3146819703491153) internal successors, (2749), 2091 states have internal predecessors, (2749), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2753 transitions. [2022-04-06 20:48:45,988 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2753 transitions. Word has length 60 [2022-04-06 20:48:45,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:45,989 INFO L478 AbstractCegarLoop]: Abstraction has 2096 states and 2753 transitions. [2022-04-06 20:48:45,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2753 transitions. [2022-04-06 20:48:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:48:45,990 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:45,990 INFO L499 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:46,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:46,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:46,191 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:46,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1383586363, now seen corresponding path program 119 times [2022-04-06 20:48:46,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:46,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2098288657] [2022-04-06 20:48:46,192 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:46,192 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:46,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1383586363, now seen corresponding path program 120 times [2022-04-06 20:48:46,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:46,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902347290] [2022-04-06 20:48:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:46,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:47,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 781 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:47,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902347290] [2022-04-06 20:48:47,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902347290] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:47,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115796568] [2022-04-06 20:48:47,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:47,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:47,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:47,052 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:47,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 20:48:47,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:48:47,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:48:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2022-04-06 20:48:47,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2022-04-06 20:48:47,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115796568] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:47,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:47,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 5, 5] total 50 [2022-04-06 20:48:47,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:47,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2098288657] [2022-04-06 20:48:47,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2098288657] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:47,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:47,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:48:47,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051756868] [2022-04-06 20:48:47,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:47,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:48:47,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:48:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2342, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:48:47,407 INFO L87 Difference]: Start difference. First operand 2096 states and 2753 transitions. Second operand has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 44 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:57,973 INFO L93 Difference]: Finished difference Result 3404 states and 5211 transitions. [2022-04-06 20:48:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:48:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 44 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-04-06 20:48:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:57,977 INFO L225 Difference]: With dead ends: 3404 [2022-04-06 20:48:57,977 INFO L226 Difference]: Without dead ends: 3338 [2022-04-06 20:48:57,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=298, Invalid=8258, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:48:57,977 INFO L913 BasicCegarLoop]: 224 mSDtfsCounter, 443 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 17133 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 17449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 17133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:57,978 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 436 Invalid, 17449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 17133 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-04-06 20:48:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2022-04-06 20:49:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2145. [2022-04-06 20:49:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2140 states have (on average 1.316822429906542) internal successors, (2818), 2140 states have internal predecessors, (2818), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 2822 transitions. [2022-04-06 20:49:01,080 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 2822 transitions. Word has length 60 [2022-04-06 20:49:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:01,080 INFO L478 AbstractCegarLoop]: Abstraction has 2145 states and 2822 transitions. [2022-04-06 20:49:01,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 44 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 2822 transitions. [2022-04-06 20:49:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:49:01,082 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:01,082 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:01,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-04-06 20:49:01,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-04-06 20:49:01,283 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2097484104, now seen corresponding path program 95 times [2022-04-06 20:49:01,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:01,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327064875] [2022-04-06 20:49:01,284 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:01,284 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:01,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2097484104, now seen corresponding path program 96 times [2022-04-06 20:49:01,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:01,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514897316] [2022-04-06 20:49:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:01,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:01,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 20:49:01,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:01,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514897316] [2022-04-06 20:49:01,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514897316] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:01,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36524236] [2022-04-06 20:49:01,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:01,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:01,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:01,715 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:01,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 20:49:02,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:49:02,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:49:02,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 20:49:02,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 20:49:02,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36524236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:02,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:02,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14, 14] total 36 [2022-04-06 20:49:02,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:02,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327064875] [2022-04-06 20:49:02,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327064875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:02,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:02,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:49:02,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313988492] [2022-04-06 20:49:02,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:02,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:49:02,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:02,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:49:02,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=970, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:49:02,490 INFO L87 Difference]: Start difference. First operand 2145 states and 2822 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:17,653 INFO L93 Difference]: Finished difference Result 5714 states and 6967 transitions. [2022-04-06 20:49:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:49:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 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 61 [2022-04-06 20:49:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:17,659 INFO L225 Difference]: With dead ends: 5714 [2022-04-06 20:49:17,659 INFO L226 Difference]: Without dead ends: 5501 [2022-04-06 20:49:17,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=709, Invalid=2597, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:49:17,660 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 158 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:17,660 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 127 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:49:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2022-04-06 20:49:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 2224. [2022-04-06 20:49:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2219 states have (on average 1.3123028391167193) internal successors, (2912), 2219 states have internal predecessors, (2912), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 2916 transitions. [2022-04-06 20:49:20,891 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 2916 transitions. Word has length 61 [2022-04-06 20:49:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:20,891 INFO L478 AbstractCegarLoop]: Abstraction has 2224 states and 2916 transitions. [2022-04-06 20:49:20,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 2916 transitions. [2022-04-06 20:49:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:49:20,892 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:20,892 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:20,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:21,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-06 20:49:21,094 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1522279208, now seen corresponding path program 97 times [2022-04-06 20:49:21,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:21,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882408389] [2022-04-06 20:49:21,095 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:21,095 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1522279208, now seen corresponding path program 98 times [2022-04-06 20:49:21,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:21,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072868890] [2022-04-06 20:49:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:21,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:21,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:49:21,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:21,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072868890] [2022-04-06 20:49:21,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072868890] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:21,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499233676] [2022-04-06 20:49:21,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:21,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:21,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:21,603 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:21,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 20:49:21,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:21,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:21,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 20:49:21,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 39 proven. 169 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 20:49:22,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 39 proven. 169 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 20:49:22,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499233676] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:22,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:22,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 16, 16] total 47 [2022-04-06 20:49:22,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:22,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882408389] [2022-04-06 20:49:22,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882408389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:22,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:22,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:49:22,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834363857] [2022-04-06 20:49:22,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:22,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:49:22,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:22,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:49:22,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2058, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:49:22,308 INFO L87 Difference]: Start difference. First operand 2224 states and 2916 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:30,092 INFO L93 Difference]: Finished difference Result 2522 states and 3400 transitions. [2022-04-06 20:49:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 20:49:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 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 61 [2022-04-06 20:49:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:30,095 INFO L225 Difference]: With dead ends: 2522 [2022-04-06 20:49:30,095 INFO L226 Difference]: Without dead ends: 2326 [2022-04-06 20:49:30,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4881 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=824, Invalid=20638, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 20:49:30,096 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 144 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5820 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 5820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:30,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 208 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 5820 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:49:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2022-04-06 20:49:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2225. [2022-04-06 20:49:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2220 states have (on average 1.3121621621621622) internal successors, (2913), 2220 states have internal predecessors, (2913), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:33,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2917 transitions. [2022-04-06 20:49:33,286 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2917 transitions. Word has length 61 [2022-04-06 20:49:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:33,286 INFO L478 AbstractCegarLoop]: Abstraction has 2225 states and 2917 transitions. [2022-04-06 20:49:33,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2917 transitions. [2022-04-06 20:49:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:49:33,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:33,288 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:33,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-04-06 20:49:33,488 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-04-06 20:49:33,488 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:33,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1886975897, now seen corresponding path program 121 times [2022-04-06 20:49:33,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:33,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1953072993] [2022-04-06 20:49:33,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:33,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1886975897, now seen corresponding path program 122 times [2022-04-06 20:49:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:33,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779896541] [2022-04-06 20:49:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:33,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 20:49:33,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:33,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779896541] [2022-04-06 20:49:33,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779896541] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:33,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978443342] [2022-04-06 20:49:33,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:33,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:33,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:33,804 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:33,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 20:49:33,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:33,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:33,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:49:33,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:49:34,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 20:49:35,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978443342] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:35,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:35,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 36, 36] total 72 [2022-04-06 20:49:35,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:35,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1953072993] [2022-04-06 20:49:35,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1953072993] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:35,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:35,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:49:35,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446683409] [2022-04-06 20:49:35,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:35,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:49:35,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:49:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=4375, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:49:35,713 INFO L87 Difference]: Start difference. First operand 2225 states and 2917 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:41,320 INFO L93 Difference]: Finished difference Result 2546 states and 3304 transitions. [2022-04-06 20:49:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:49:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:49:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:41,323 INFO L225 Difference]: With dead ends: 2546 [2022-04-06 20:49:41,323 INFO L226 Difference]: Without dead ends: 2508 [2022-04-06 20:49:41,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1634, Invalid=9078, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:49:41,324 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 167 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3452 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 3452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:41,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 192 Invalid, 3587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 3452 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:49:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2022-04-06 20:49:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2225. [2022-04-06 20:49:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2220 states have (on average 1.3117117117117116) internal successors, (2912), 2220 states have internal predecessors, (2912), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2916 transitions. [2022-04-06 20:49:44,498 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2916 transitions. Word has length 61 [2022-04-06 20:49:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:44,498 INFO L478 AbstractCegarLoop]: Abstraction has 2225 states and 2916 transitions. [2022-04-06 20:49:44,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2916 transitions. [2022-04-06 20:49:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:49:44,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:44,500 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:44,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-04-06 20:49:44,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-06 20:49:44,701 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash 376861735, now seen corresponding path program 123 times [2022-04-06 20:49:44,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:44,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1798504351] [2022-04-06 20:49:44,702 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:44,702 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:44,702 INFO L85 PathProgramCache]: Analyzing trace with hash 376861735, now seen corresponding path program 124 times [2022-04-06 20:49:44,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:44,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559042280] [2022-04-06 20:49:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:44,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:45,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 20:49:45,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559042280] [2022-04-06 20:49:45,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559042280] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267119123] [2022-04-06 20:49:45,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:45,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:45,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:45,037 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:45,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 20:49:45,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:45,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:49:45,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 20:49:45,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 20:49:46,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267119123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:46,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:46,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 20:49:46,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:46,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1798504351] [2022-04-06 20:49:46,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1798504351] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:46,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:46,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:49:46,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098146312] [2022-04-06 20:49:46,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:46,080 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:49:46,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:46,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:49:46,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1941, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:49:46,080 INFO L87 Difference]: Start difference. First operand 2225 states and 2916 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:51,567 INFO L93 Difference]: Finished difference Result 2625 states and 3386 transitions. [2022-04-06 20:49:51,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:49:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 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 61 [2022-04-06 20:49:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:51,570 INFO L225 Difference]: With dead ends: 2625 [2022-04-06 20:49:51,570 INFO L226 Difference]: Without dead ends: 2590 [2022-04-06 20:49:51,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1166, Invalid=4534, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:49:51,571 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 217 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4221 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 4359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:51,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 217 Invalid, 4359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4221 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:49:51,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2022-04-06 20:49:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2225. [2022-04-06 20:49:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2220 states have (on average 1.3112612612612613) internal successors, (2911), 2220 states have internal predecessors, (2911), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2915 transitions. [2022-04-06 20:49:54,835 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2915 transitions. Word has length 61 [2022-04-06 20:49:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:54,835 INFO L478 AbstractCegarLoop]: Abstraction has 2225 states and 2915 transitions. [2022-04-06 20:49:54,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2915 transitions. [2022-04-06 20:49:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:49:54,837 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:54,837 INFO L499 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:54,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-04-06 20:49:55,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:55,038 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:55,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash -101166776, now seen corresponding path program 125 times [2022-04-06 20:49:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:55,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1050827416] [2022-04-06 20:49:55,040 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:55,040 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash -101166776, now seen corresponding path program 126 times [2022-04-06 20:49:55,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:55,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259786679] [2022-04-06 20:49:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:55,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:55,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 0 proven. 821 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:55,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:55,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259786679] [2022-04-06 20:49:55,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259786679] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:55,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279689826] [2022-04-06 20:49:55,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:55,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:55,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:55,973 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:55,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 20:49:56,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:49:56,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:56,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:49:56,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2022-04-06 20:49:56,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2022-04-06 20:49:56,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279689826] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:56,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:56,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 5, 5] total 51 [2022-04-06 20:49:56,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:56,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1050827416] [2022-04-06 20:49:56,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1050827416] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:56,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:56,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:49:56,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245749708] [2022-04-06 20:49:56,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:56,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:49:56,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:49:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2440, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:49:56,350 INFO L87 Difference]: Start difference. First operand 2225 states and 2915 transitions. Second operand has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 45 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:07,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:07,456 INFO L93 Difference]: Finished difference Result 3617 states and 5527 transitions. [2022-04-06 20:50:07,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:50:07,457 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 45 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:50:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:07,460 INFO L225 Difference]: With dead ends: 3617 [2022-04-06 20:50:07,460 INFO L226 Difference]: Without dead ends: 3549 [2022-04-06 20:50:07,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=304, Invalid=8626, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:50:07,461 INFO L913 BasicCegarLoop]: 230 mSDtfsCounter, 458 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 17592 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 17917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 17592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:07,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 442 Invalid, 17917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 17592 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-04-06 20:50:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2022-04-06 20:50:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 2276. [2022-04-06 20:50:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2271 states have (on average 1.313518273888155) internal successors, (2983), 2271 states have internal predecessors, (2983), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 2987 transitions. [2022-04-06 20:50:10,859 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 2987 transitions. Word has length 61 [2022-04-06 20:50:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:10,859 INFO L478 AbstractCegarLoop]: Abstraction has 2276 states and 2987 transitions. [2022-04-06 20:50:10,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 45 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:10,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 2987 transitions. [2022-04-06 20:50:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:50:10,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:10,862 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:10,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-04-06 20:50:11,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:11,074 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash -380296650, now seen corresponding path program 99 times [2022-04-06 20:50:11,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:11,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [401685868] [2022-04-06 20:50:11,075 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:11,075 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash -380296650, now seen corresponding path program 100 times [2022-04-06 20:50:11,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:11,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692209745] [2022-04-06 20:50:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:11,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:11,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:50:11,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:11,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692209745] [2022-04-06 20:50:11,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692209745] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:11,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387707601] [2022-04-06 20:50:11,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:11,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:11,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:11,615 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:11,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 20:50:11,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:11,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:50:11,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 28 proven. 196 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-04-06 20:50:12,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 28 proven. 196 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-04-06 20:50:12,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387707601] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:12,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:12,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 17, 17] total 49 [2022-04-06 20:50:12,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [401685868] [2022-04-06 20:50:12,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [401685868] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:12,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:12,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:50:12,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814436485] [2022-04-06 20:50:12,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:12,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:50:12,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:12,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:50:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2243, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:50:12,402 INFO L87 Difference]: Start difference. First operand 2276 states and 2987 transitions. Second operand has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:20,311 INFO L93 Difference]: Finished difference Result 2577 states and 3476 transitions. [2022-04-06 20:50:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-04-06 20:50:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:50:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:20,314 INFO L225 Difference]: With dead ends: 2577 [2022-04-06 20:50:20,314 INFO L226 Difference]: Without dead ends: 2378 [2022-04-06 20:50:20,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5702 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=893, Invalid=23599, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:50:20,316 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 138 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4919 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 5235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 4919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:20,316 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 163 Invalid, 5235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 4919 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:50:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2022-04-06 20:50:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2277. [2022-04-06 20:50:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2272 states have (on average 1.3133802816901408) internal successors, (2984), 2272 states have internal predecessors, (2984), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 2988 transitions. [2022-04-06 20:50:23,714 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 2988 transitions. Word has length 62 [2022-04-06 20:50:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:23,714 INFO L478 AbstractCegarLoop]: Abstraction has 2277 states and 2988 transitions. [2022-04-06 20:50:23,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 2988 transitions. [2022-04-06 20:50:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:50:23,716 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:23,716 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:23,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-04-06 20:50:23,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-06 20:50:23,917 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:23,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:23,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1717934972, now seen corresponding path program 101 times [2022-04-06 20:50:23,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:23,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [843898916] [2022-04-06 20:50:23,918 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:23,918 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:23,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1717934972, now seen corresponding path program 102 times [2022-04-06 20:50:23,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:23,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572023788] [2022-04-06 20:50:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:23,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:24,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-04-06 20:50:24,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:24,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572023788] [2022-04-06 20:50:24,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572023788] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:24,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614079057] [2022-04-06 20:50:24,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:24,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:24,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:24,447 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:24,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 20:50:25,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 20:50:25,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:50:25,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-04-06 20:50:26,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-04-06 20:50:27,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614079057] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:27,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:27,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:50:27,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:27,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [843898916] [2022-04-06 20:50:27,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [843898916] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:27,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:27,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:50:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382403917] [2022-04-06 20:50:27,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:27,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:50:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:50:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:50:27,214 INFO L87 Difference]: Start difference. First operand 2277 states and 2988 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:34,867 INFO L93 Difference]: Finished difference Result 2761 states and 3662 transitions. [2022-04-06 20:50:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 20:50:34,868 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 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 62 [2022-04-06 20:50:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:34,870 INFO L225 Difference]: With dead ends: 2761 [2022-04-06 20:50:34,870 INFO L226 Difference]: Without dead ends: 2383 [2022-04-06 20:50:34,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5121 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3804, Invalid=22278, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 20:50:34,872 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 161 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5965 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 6262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 5965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:34,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 213 Invalid, 6262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 5965 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:50:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2022-04-06 20:50:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2278. [2022-04-06 20:50:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2273 states have (on average 1.310162780466344) internal successors, (2978), 2273 states have internal predecessors, (2978), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 2982 transitions. [2022-04-06 20:50:38,331 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 2982 transitions. Word has length 62 [2022-04-06 20:50:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:38,331 INFO L478 AbstractCegarLoop]: Abstraction has 2278 states and 2982 transitions. [2022-04-06 20:50:38,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 2982 transitions. [2022-04-06 20:50:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:50:38,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:38,333 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:38,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:38,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-04-06 20:50:38,533 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:38,533 INFO L85 PathProgramCache]: Analyzing trace with hash -590027851, now seen corresponding path program 127 times [2022-04-06 20:50:38,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:38,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [799474529] [2022-04-06 20:50:38,534 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:38,534 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash -590027851, now seen corresponding path program 128 times [2022-04-06 20:50:38,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:38,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780120412] [2022-04-06 20:50:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:38,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:38,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-04-06 20:50:38,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780120412] [2022-04-06 20:50:38,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780120412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539851359] [2022-04-06 20:50:38,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:38,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:38,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:38,889 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:38,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 20:50:38,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:38,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:50:38,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 348 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:50:39,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 348 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 20:50:41,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539851359] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:41,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:41,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 40, 40] total 80 [2022-04-06 20:50:41,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:41,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [799474529] [2022-04-06 20:50:41,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [799474529] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:41,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:41,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:50:41,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678953190] [2022-04-06 20:50:41,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:41,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:50:41,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:41,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:50:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=899, Invalid=5421, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:50:41,143 INFO L87 Difference]: Start difference. First operand 2278 states and 2982 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:46,772 INFO L93 Difference]: Finished difference Result 2644 states and 3417 transitions. [2022-04-06 20:50:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:50:46,773 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 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 62 [2022-04-06 20:50:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:46,775 INFO L225 Difference]: With dead ends: 2644 [2022-04-06 20:50:46,775 INFO L226 Difference]: Without dead ends: 2607 [2022-04-06 20:50:46,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1716, Invalid=10056, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:50:46,776 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 200 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3674 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 3818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:46,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 200 Invalid, 3818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3674 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:50:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2022-04-06 20:50:50,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2278. [2022-04-06 20:50:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2273 states have (on average 1.3097228332600088) internal successors, (2977), 2273 states have internal predecessors, (2977), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 2981 transitions. [2022-04-06 20:50:50,096 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 2981 transitions. Word has length 62 [2022-04-06 20:50:50,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:50,096 INFO L478 AbstractCegarLoop]: Abstraction has 2278 states and 2981 transitions. [2022-04-06 20:50:50,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 2981 transitions. [2022-04-06 20:50:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:50:50,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:50,098 INFO L499 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:50,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:50,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:50,299 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash 999134757, now seen corresponding path program 129 times [2022-04-06 20:50:50,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:50,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2130969159] [2022-04-06 20:50:50,300 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:50,300 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash 999134757, now seen corresponding path program 130 times [2022-04-06 20:50:50,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:50,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764088939] [2022-04-06 20:50:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:50,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:51,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:51,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:51,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764088939] [2022-04-06 20:50:51,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764088939] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:51,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10553770] [2022-04-06 20:50:51,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:51,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:51,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:51,331 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:51,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 20:50:51,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:51,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:50:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:51,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:54,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10553770] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:54,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:54,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 20:50:54,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:54,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2130969159] [2022-04-06 20:50:54,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2130969159] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:54,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:54,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:50:54,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628558425] [2022-04-06 20:50:54,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:54,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:50:54,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:54,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:50:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1951, Invalid=6421, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:50:54,322 INFO L87 Difference]: Start difference. First operand 2278 states and 2981 transitions. Second operand has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 46 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)